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Responses

Cancel a response
POST/responses/{response_id}/cancel
Compact a response
POST/responses/compact
Delete a model response
DELETE/responses/{response_id}
Get a model response
GET/responses/{response_id}
ModelsExpand Collapse
CompactedResponse object { id, created_at, object, 2 more }
id: string

The unique identifier for the compacted response.

created_at: number

Unix timestamp (in seconds) when the compacted conversation was created.

formatunixtime
object: "response.compaction"

The object type. Always response.compaction.

output: array of Message { id, content, role, 3 more } or object { id, call_id, code, 2 more } or object { id, call_id, result, 2 more } or 25 more

The compacted list of output items.

One of the following:
Message object { id, content, role, 3 more }

A message to or from the model.

id: string

The unique ID of the message.

content: array of ResponseInputText { text, type, prompt_cache_breakpoint } or ResponseOutputText { annotations, logprobs, text, type } or TextContent { text, type } or 6 more

The content of the message

One of the following:
ResponseInputText object { text, type, prompt_cache_breakpoint }

A text input to the model.

text: string

The text input to the model.

type: "input_text"

The type of the input item. Always input_text.

prompt_cache_breakpoint: optional object { mode }

Marks the exact end of a reusable prompt prefix. The breakpoint inherits its TTL from the request’s prompt_cache_options.ttl; the boundary is not rounded to a token block.

mode: "explicit"

The breakpoint mode. Always explicit.

ResponseOutputText object { annotations, logprobs, text, type }

A text output from the model.

annotations: array of object { file_id, filename, index, type } or object { end_index, start_index, title, 2 more } or object { container_id, end_index, file_id, 3 more } or object { file_id, index, type }

The annotations of the text output.

One of the following:
FileCitation object { file_id, filename, index, type }

A citation to a file.

file_id: string

The ID of the file.

filename: string

The filename of the file cited.

index: number

The index of the file in the list of files.

type: "file_citation"

The type of the file citation. Always file_citation.

URLCitation object { end_index, start_index, title, 2 more }

A citation for a web resource used to generate a model response.

end_index: number

The index of the last character of the URL citation in the message.

start_index: number

The index of the first character of the URL citation in the message.

title: string

The title of the web resource.

type: "url_citation"

The type of the URL citation. Always url_citation.

url: string

The URL of the web resource.

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ContainerFileCitation object { container_id, end_index, file_id, 3 more }

A citation for a container file used to generate a model response.

container_id: string

The ID of the container file.

end_index: number

The index of the last character of the container file citation in the message.

file_id: string

The ID of the file.

filename: string

The filename of the container file cited.

start_index: number

The index of the first character of the container file citation in the message.

type: "container_file_citation"

The type of the container file citation. Always container_file_citation.

FilePath object { file_id, index, type }

A path to a file.

file_id: string

The ID of the file.

index: number

The index of the file in the list of files.

type: "file_path"

The type of the file path. Always file_path.

logprobs: array of object { token, bytes, logprob, top_logprobs }
token: string
bytes: array of number
logprob: number
top_logprobs: array of object { token, bytes, logprob }
token: string
bytes: array of number
logprob: number
text: string

The text output from the model.

type: "output_text"

The type of the output text. Always output_text.

TextContent object { text, type }

A text content.

text: string
type: "text"
SummaryTextContent object { text, type }

A summary text from the model.

text: string

A summary of the reasoning output from the model so far.

type: "summary_text"

The type of the object. Always summary_text.

ReasoningText object { text, type }

Reasoning text from the model.

text: string

The reasoning text from the model.

type: "reasoning_text"

The type of the reasoning text. Always reasoning_text.

ResponseOutputRefusal object { refusal, type }

A refusal from the model.

refusal: string

The refusal explanation from the model.

type: "refusal"

The type of the refusal. Always refusal.

ResponseInputImage object { detail, type, file_id, 2 more }

An image input to the model. Learn about image inputs.

detail: ImageDetail

The detail level of the image to be sent to the model. One of high, low, auto, or original. Defaults to auto.

type: "input_image"

The type of the input item. Always input_image.

file_id: optional string or null

The ID of the file to be sent to the model.

image_url: optional string or null

The URL of the image to be sent to the model. A fully qualified URL or base64 encoded image in a data URL.

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prompt_cache_breakpoint: optional object { mode }

Marks the exact end of a reusable prompt prefix. The breakpoint inherits its TTL from the request’s prompt_cache_options.ttl; the boundary is not rounded to a token block.

mode: "explicit"

The breakpoint mode. Always explicit.

ComputerScreenshotContent object { detail, file_id, image_url, 2 more }

A screenshot of a computer.

detail: ImageDetail

The detail level of the screenshot image to be sent to the model. One of high, low, auto, or original. Defaults to auto.

file_id: string or null

The identifier of an uploaded file that contains the screenshot.

image_url: string or null

The URL of the screenshot image.

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type: "computer_screenshot"

Specifies the event type. For a computer screenshot, this property is always set to computer_screenshot.

prompt_cache_breakpoint: optional object { mode }

Marks the exact end of a reusable prompt prefix. The breakpoint inherits its TTL from the request’s prompt_cache_options.ttl; the boundary is not rounded to a token block.

mode: "explicit"

The breakpoint mode. Always explicit.

ResponseInputFile object { type, detail, file_data, 4 more }

A file input to the model.

type: "input_file"

The type of the input item. Always input_file.

detail: optional "auto" or "low" or "high"

The detail level of the file to be sent to the model. Use auto to let the system select the detail level; for GPT-5.6 and later models, auto uses high-quality rendering, which may increase input token usage. Use low for lower-cost rendering, or high to render the file at higher quality. Defaults to auto.

One of the following:
"auto"
"low"
"high"
file_data: optional string

The content of the file to be sent to the model.

file_id: optional string or null

The ID of the file to be sent to the model.

file_url: optional string

The URL of the file to be sent to the model.

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filename: optional string

The name of the file to be sent to the model.

prompt_cache_breakpoint: optional object { mode }

Marks the exact end of a reusable prompt prefix. The breakpoint inherits its TTL from the request’s prompt_cache_options.ttl; the boundary is not rounded to a token block.

mode: "explicit"

The breakpoint mode. Always explicit.

role: "unknown" or "user" or "assistant" or 5 more

The role of the message. One of unknown, user, assistant, system, critic, discriminator, developer, or tool.

One of the following:
"unknown"
"user"
"assistant"
"system"
"critic"
"discriminator"
"developer"
"tool"
status: "in_progress" or "completed" or "incomplete"

The status of item. One of in_progress, completed, or incomplete. Populated when items are returned via API.

One of the following:
"in_progress"
"completed"
"incomplete"
type: "message"

The type of the message. Always set to message.

phase: optional "commentary" or "final_answer" or null

Labels an assistant message as intermediate commentary (commentary) or the final answer (final_answer). For models like gpt-5.3-codex and beyond, when sending follow-up requests, preserve and resend phase on all assistant messages — dropping it can degrade performance. Not used for user messages.

One of the following:
"commentary"
"final_answer"
Program object { id, call_id, code, 2 more }
id: string

The unique ID of the program item.

call_id: string

The stable call ID of the program item.

code: string

The JavaScript source executed by programmatic tool calling.

fingerprint: string

Opaque program replay fingerprint that must be round-tripped.

type: "program"

The type of the item. Always program.

ProgramOutput object { id, call_id, result, 2 more }
id: string

The unique ID of the program output item.

call_id: string

The call ID of the program item.

result: string

The result produced by the program item.

status: "completed" or "incomplete"

The terminal status of the program output item.

One of the following:
"completed"
"incomplete"
type: "program_output"

The type of the item. Always program_output.

FunctionCall object { arguments, call_id, name, 5 more }

A tool call to run a function. See the function calling guide for more information.

arguments: string

A JSON string of the arguments to pass to the function.

call_id: string

The unique ID of the function tool call generated by the model.

name: string

The name of the function to run.

type: "function_call"

The type of the function tool call. Always function_call.

id: optional string

The unique ID of the function tool call.

caller: optional object { type } or object { caller_id, type } or null

The execution context that produced this tool call.

One of the following:
Direct object { type }
type: "direct"
Program object { caller_id, type }
caller_id: string

The call ID of the program item that produced this tool call.

type: "program"
namespace: optional string

The namespace of the function to run.

status: optional "in_progress" or "completed" or "incomplete"

The status of the item. One of in_progress, completed, or incomplete. Populated when items are returned via API.

One of the following:
"in_progress"
"completed"
"incomplete"
ToolSearchCall object { id, arguments, call_id, 4 more }
id: string

The unique ID of the tool search call item.

arguments: unknown

Arguments used for the tool search call.

call_id: string or null

The unique ID of the tool search call generated by the model.

execution: "server" or "client"

Whether tool search was executed by the server or by the client.

One of the following:
"server"
"client"
status: "in_progress" or "completed" or "incomplete"

The status of the tool search call item that was recorded.

One of the following:
"in_progress"
"completed"
"incomplete"
type: "tool_search_call"

The type of the item. Always tool_search_call.

created_by: optional string

The identifier of the actor that created the item.

ToolSearchOutput object { id, call_id, execution, 4 more }
id: string

The unique ID of the tool search output item.

call_id: string or null

The unique ID of the tool search call generated by the model.

execution: "server" or "client"

Whether tool search was executed by the server or by the client.

One of the following:
"server"
"client"
status: "in_progress" or "completed" or "incomplete"

The status of the tool search output item that was recorded.

One of the following:
"in_progress"
"completed"
"incomplete"
tools: array of object { name, parameters, strict, 5 more } or object { type, vector_store_ids, filters, 2 more } or object { type } or 13 more

The loaded tool definitions returned by tool search.

One of the following:
Function object { name, parameters, strict, 5 more }

Defines a function in your own code the model can choose to call. Learn more about function calling.

name: string

The name of the function to call.

parameters: map[unknown] or null

A JSON schema object describing the parameters of the function.

strict: boolean or null

Whether strict parameter validation is enforced for this function tool.

type: "function"

The type of the function tool. Always function.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
defer_loading: optional boolean

Whether this function is deferred and loaded via tool search.

description: optional string or null

A description of the function. Used by the model to determine whether or not to call the function.

output_schema: optional map[unknown] or null

A JSON schema object describing the JSON value encoded in string outputs for this function.

FileSearch object { type, vector_store_ids, filters, 2 more }

A tool that searches for relevant content from uploaded files. Learn more about the file search tool.

type: "file_search"

The type of the file search tool. Always file_search.

vector_store_ids: array of string

The IDs of the vector stores to search.

filters: optional ComparisonFilter { key, type, value } or CompoundFilter { filters, type } or null

A filter to apply.

One of the following:
ComparisonFilter object { key, type, value }

A filter used to compare a specified attribute key to a given value using a defined comparison operation.

key: string

The key to compare against the value.

type: "eq" or "ne" or "gt" or 5 more

Specifies the comparison operator: eq, ne, gt, gte, lt, lte, in, nin.

  • eq: equals
  • ne: not equal
  • gt: greater than
  • gte: greater than or equal
  • lt: less than
  • lte: less than or equal
  • in: in
  • nin: not in
One of the following:
"eq"
"ne"
"gt"
"gte"
"lt"
"lte"
"in"
"nin"
value: string or number or boolean or array of string or number

The value to compare against the attribute key; supports string, number, or boolean types.

One of the following:
string
number
boolean
array of string or number
One of the following:
string
number
CompoundFilter object { filters, type }

Combine multiple filters using and or or.

filters: array of ComparisonFilter { key, type, value } or unknown

Array of filters to combine. Items can be ComparisonFilter or CompoundFilter.

One of the following:
ComparisonFilter object { key, type, value }

A filter used to compare a specified attribute key to a given value using a defined comparison operation.

key: string

The key to compare against the value.

type: "eq" or "ne" or "gt" or 5 more

Specifies the comparison operator: eq, ne, gt, gte, lt, lte, in, nin.

  • eq: equals
  • ne: not equal
  • gt: greater than
  • gte: greater than or equal
  • lt: less than
  • lte: less than or equal
  • in: in
  • nin: not in
One of the following:
"eq"
"ne"
"gt"
"gte"
"lt"
"lte"
"in"
"nin"
value: string or number or boolean or array of string or number

The value to compare against the attribute key; supports string, number, or boolean types.

One of the following:
string
number
boolean
array of string or number
One of the following:
string
number
unknown
type: "and" or "or"

Type of operation: and or or.

One of the following:
"and"
"or"
max_num_results: optional number

The maximum number of results to return. This number should be between 1 and 50 inclusive.

ranking_options: optional object { hybrid_search, ranker, score_threshold }

Ranking options for search.

ranker: optional "auto" or "default-2024-11-15"

The ranker to use for the file search.

One of the following:
"auto"
"default-2024-11-15"
score_threshold: optional number

The score threshold for the file search, a number between 0 and 1. Numbers closer to 1 will attempt to return only the most relevant results, but may return fewer results.

Computer object { type }

A tool that controls a virtual computer. Learn more about the computer tool.

type: "computer"

The type of the computer tool. Always computer.

ComputerUsePreview object { display_height, display_width, environment, type }

A tool that controls a virtual computer. Learn more about the computer tool.

display_height: number

The height of the computer display.

display_width: number

The width of the computer display.

environment: "windows" or "mac" or "linux" or 2 more

The type of computer environment to control.

One of the following:
"windows"
"mac"
"linux"
"ubuntu"
"browser"
type: "computer_use_preview"

The type of the computer use tool. Always computer_use_preview.

WebSearch object { type, external_web_access, filters, 2 more }

Search the Internet for sources related to the prompt. Learn more about the web search tool.

type: "web_search" or "web_search_2025_08_26"

The type of the web search tool. One of web_search or web_search_2025_08_26.

One of the following:
"web_search"
"web_search_2025_08_26"
external_web_access: optional boolean

Allow live internet access for web search. Defaults to true when omitted. When false, the web search tool runs in offline/cache-only mode and will not fetch new external content.

filters: optional object { allowed_domains } or null

Filters for the search.

allowed_domains: optional array of string or null

Allowed domains for the search. If not provided, all domains are allowed. Subdomains of the provided domains are allowed as well.

Example: ["pubmed.ncbi.nlm.nih.gov"]

search_context_size: optional "low" or "medium" or "high"

High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.

One of the following:
"low"
"medium"
"high"
user_location: optional object { city, country, region, 2 more } or null

The approximate location of the user.

city: optional string or null

Free text input for the city of the user, e.g. San Francisco.

country: optional string or null

The two-letter ISO country code of the user, e.g. US.

region: optional string or null

Free text input for the region of the user, e.g. California.

timezone: optional string or null

The IANA timezone of the user, e.g. America/Los_Angeles.

type: optional "approximate"

The type of location approximation. Always approximate.

Mcp object { server_label, type, allowed_callers, 9 more }

Give the model access to additional tools via remote Model Context Protocol (MCP) servers. Learn more about MCP.

server_label: string

A label for this MCP server, used to identify it in tool calls.

type: "mcp"

The type of the MCP tool. Always mcp.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
allowed_tools: optional array of string or object { read_only, tool_names } or null

List of allowed tool names or a filter object.

One of the following:
McpAllowedTools = array of string

A string array of allowed tool names

McpToolFilter object { read_only, tool_names }

A filter object to specify which tools are allowed.

read_only: optional boolean

Indicates whether or not a tool modifies data or is read-only. If an MCP server is annotated with readOnlyHint, it will match this filter.

tool_names: optional array of string

List of allowed tool names.

authorization: optional string

An OAuth access token that can be used with a remote MCP server, either with a custom MCP server URL or a service connector. Your application must handle the OAuth authorization flow and provide the token here.

connector_id: optional "connector_dropbox" or "connector_gmail" or "connector_googlecalendar" or 5 more

Identifier for service connectors, like those available in ChatGPT. One of server_url, connector_id, or tunnel_id must be provided. Learn more about service connectors here.

Currently supported connector_id values are:

  • Dropbox: connector_dropbox
  • Gmail: connector_gmail
  • Google Calendar: connector_googlecalendar
  • Google Drive: connector_googledrive
  • Microsoft Teams: connector_microsoftteams
  • Outlook Calendar: connector_outlookcalendar
  • Outlook Email: connector_outlookemail
  • SharePoint: connector_sharepoint
One of the following:
"connector_dropbox"
"connector_gmail"
"connector_googlecalendar"
"connector_googledrive"
"connector_microsoftteams"
"connector_outlookcalendar"
"connector_outlookemail"
"connector_sharepoint"
defer_loading: optional boolean

Whether this MCP tool is deferred and discovered via tool search.

headers: optional map[string] or null

Optional HTTP headers to send to the MCP server. Use for authentication or other purposes.

require_approval: optional object { always, never } or "always" or "never" or null

Specify which of the MCP server’s tools require approval.

One of the following:
McpToolApprovalFilter object { always, never }

Specify which of the MCP server’s tools require approval. Can be always, never, or a filter object associated with tools that require approval.

always: optional object { read_only, tool_names }

A filter object to specify which tools are allowed.

read_only: optional boolean

Indicates whether or not a tool modifies data or is read-only. If an MCP server is annotated with readOnlyHint, it will match this filter.

tool_names: optional array of string

List of allowed tool names.

never: optional object { read_only, tool_names }

A filter object to specify which tools are allowed.

read_only: optional boolean

Indicates whether or not a tool modifies data or is read-only. If an MCP server is annotated with readOnlyHint, it will match this filter.

tool_names: optional array of string

List of allowed tool names.

McpToolApprovalSetting = "always" or "never"

Specify a single approval policy for all tools. One of always or never. When set to always, all tools will require approval. When set to never, all tools will not require approval.

One of the following:
"always"
"never"
server_description: optional string

Optional description of the MCP server, used to provide more context.

server_url: optional string

The URL for the MCP server. One of server_url, connector_id, or tunnel_id must be provided.

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tunnel_id: optional string

The Secure MCP Tunnel ID to use instead of a direct server URL. One of server_url, connector_id, or tunnel_id must be provided.

CodeInterpreter object { container, type, allowed_callers }

A tool that runs Python code to help generate a response to a prompt.

container: string or object { type, file_ids, memory_limit, network_policy }

The code interpreter container. Can be a container ID or an object that specifies uploaded file IDs to make available to your code, along with an optional memory_limit setting.

One of the following:
string

The container ID.

CodeInterpreterToolAuto object { type, file_ids, memory_limit, network_policy }

Configuration for a code interpreter container. Optionally specify the IDs of the files to run the code on.

type: "auto"

Always auto.

file_ids: optional array of string

An optional list of uploaded files to make available to your code.

memory_limit: optional "1g" or "4g" or "16g" or "64g" or null

The memory limit for the code interpreter container.

One of the following:
"1g"
"4g"
"16g"
"64g"
network_policy: optional ContainerNetworkPolicyDisabled { type } or ContainerNetworkPolicyAllowlist { allowed_domains, type, domain_secrets }

Network access policy for the container.

One of the following:
ContainerNetworkPolicyDisabled object { type }
type: "disabled"

Disable outbound network access. Always disabled.

ContainerNetworkPolicyAllowlist object { allowed_domains, type, domain_secrets }
allowed_domains: array of string

A list of allowed domains when type is allowlist.

type: "allowlist"

Allow outbound network access only to specified domains. Always allowlist.

domain_secrets: optional array of ContainerNetworkPolicyDomainSecret { domain, name, value }

Optional domain-scoped secrets for allowlisted domains.

domain: string

The domain associated with the secret.

minLength1
name: string

The name of the secret to inject for the domain.

minLength1
value: string

The secret value to inject for the domain.

minLength1
maxLength10485760
type: "code_interpreter"

The type of the code interpreter tool. Always code_interpreter.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
ProgrammaticToolCalling object { type }
type: "programmatic_tool_calling"

The type of the tool. Always programmatic_tool_calling.

ImageGeneration object { type, action, background, 9 more }

A tool that generates images using the GPT image models.

type: "image_generation"

The type of the image generation tool. Always image_generation.

action: optional "generate" or "edit" or "auto"

Whether to generate a new image or edit an existing image. Default: auto.

One of the following:
"generate"
"edit"
"auto"
background: optional "transparent" or "opaque" or "auto"

Background type for the generated image. One of transparent, opaque, or auto. Default: auto.

One of the following:
"transparent"
"opaque"
"auto"
input_fidelity: optional "high" or "low" or null

Control how much effort the model will exert to match the style and features, especially facial features, of input images. This parameter is only supported for gpt-image-1 and gpt-image-1.5 and later models, unsupported for gpt-image-1-mini. Supports high and low. Defaults to low.

One of the following:
"high"
"low"
input_image_mask: optional object { file_id, image_url }

Optional mask for inpainting. Contains image_url (string, optional) and file_id (string, optional).

file_id: optional string

File ID for the mask image.

image_url: optional string

Base64-encoded mask image.

model: optional string or "gpt-image-1" or "gpt-image-1-mini" or "gpt-image-1.5"

The image generation model to use. Default: gpt-image-1.

One of the following:
string
"gpt-image-1" or "gpt-image-1-mini" or "gpt-image-1.5"

The image generation model to use. Default: gpt-image-1.

One of the following:
"gpt-image-1"
"gpt-image-1-mini"
"gpt-image-1.5"
moderation: optional "auto" or "low"

Moderation level for the generated image. Default: auto.

One of the following:
"auto"
"low"
output_compression: optional number

Compression level for the output image. Default: 100.

minimum0
maximum100
output_format: optional "png" or "webp" or "jpeg"

The output format of the generated image. One of png, webp, or jpeg. Default: png.

One of the following:
"png"
"webp"
"jpeg"
partial_images: optional number

Number of partial images to generate in streaming mode, from 0 (default value) to 3.

minimum0
maximum3
quality: optional "low" or "medium" or "high" or "auto"

The quality of the generated image. One of low, medium, high, or auto. Default: auto.

One of the following:
"low"
"medium"
"high"
"auto"
size: optional string or "1024x1024" or "1024x1536" or "1536x1024" or "auto"

The size of the generated images. For gpt-image-2 and gpt-image-2-2026-04-21, arbitrary resolutions are supported as WIDTHxHEIGHT strings, for example 1536x864. Width and height must both be divisible by 16 and the requested aspect ratio must be between 1:3 and 3:1. Resolutions above 2560x1440 are experimental, and the maximum supported resolution is 3840x2160. The requested size must also satisfy the model’s current pixel and edge limits. The standard sizes 1024x1024, 1536x1024, and 1024x1536 are supported by the GPT image models; auto is supported for models that allow automatic sizing. For dall-e-2, use one of 256x256, 512x512, or 1024x1024. For dall-e-3, use one of 1024x1024, 1792x1024, or 1024x1792.

One of the following:
string
"1024x1024" or "1024x1536" or "1536x1024" or "auto"

The size of the generated images. For gpt-image-2 and gpt-image-2-2026-04-21, arbitrary resolutions are supported as WIDTHxHEIGHT strings, for example 1536x864. Width and height must both be divisible by 16 and the requested aspect ratio must be between 1:3 and 3:1. Resolutions above 2560x1440 are experimental, and the maximum supported resolution is 3840x2160. The requested size must also satisfy the model’s current pixel and edge limits. The standard sizes 1024x1024, 1536x1024, and 1024x1536 are supported by the GPT image models; auto is supported for models that allow automatic sizing. For dall-e-2, use one of 256x256, 512x512, or 1024x1024. For dall-e-3, use one of 1024x1024, 1792x1024, or 1024x1792.

One of the following:
"1024x1024"
"1024x1536"
"1536x1024"
"auto"
LocalShell object { type }

A tool that allows the model to execute shell commands in a local environment.

type: "local_shell"

The type of the local shell tool. Always local_shell.

Shell object { type, allowed_callers, environment }

A tool that allows the model to execute shell commands.

type: "shell"

The type of the shell tool. Always shell.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
environment: optional ContainerAuto { type, file_ids, memory_limit, 2 more } or LocalEnvironment { type, skills } or ContainerReference { container_id, type } or null
One of the following:
ContainerAuto object { type, file_ids, memory_limit, 2 more }
type: "container_auto"

Automatically creates a container for this request

file_ids: optional array of string

An optional list of uploaded files to make available to your code.

memory_limit: optional "1g" or "4g" or "16g" or "64g" or null

The memory limit for the container.

One of the following:
"1g"
"4g"
"16g"
"64g"
network_policy: optional ContainerNetworkPolicyDisabled { type } or ContainerNetworkPolicyAllowlist { allowed_domains, type, domain_secrets }

Network access policy for the container.

One of the following:
ContainerNetworkPolicyDisabled object { type }
type: "disabled"

Disable outbound network access. Always disabled.

ContainerNetworkPolicyAllowlist object { allowed_domains, type, domain_secrets }
allowed_domains: array of string

A list of allowed domains when type is allowlist.

type: "allowlist"

Allow outbound network access only to specified domains. Always allowlist.

domain_secrets: optional array of ContainerNetworkPolicyDomainSecret { domain, name, value }

Optional domain-scoped secrets for allowlisted domains.

domain: string

The domain associated with the secret.

minLength1
name: string

The name of the secret to inject for the domain.

minLength1
value: string

The secret value to inject for the domain.

minLength1
maxLength10485760
skills: optional array of SkillReference { skill_id, type, version } or InlineSkill { description, name, source, type }

An optional list of skills referenced by id or inline data.

One of the following:
SkillReference object { skill_id, type, version }
skill_id: string

The ID of the referenced skill.

minLength1
maxLength64
type: "skill_reference"

References a skill created with the /v1/skills endpoint.

version: optional string

Optional skill version. Use a positive integer or ‘latest’. Omit for default.

InlineSkill object { description, name, source, type }
description: string

The description of the skill.

name: string

The name of the skill.

source: InlineSkillSource { data, media_type, type }

Inline skill payload

type: "inline"

Defines an inline skill for this request.

LocalEnvironment object { type, skills }
type: "local"

Use a local computer environment.

skills: optional array of LocalSkill { description, name, path }

An optional list of skills.

description: string

The description of the skill.

name: string

The name of the skill.

path: string

The path to the directory containing the skill.

ContainerReference object { container_id, type }
container_id: string

The ID of the referenced container.

type: "container_reference"

References a container created with the /v1/containers endpoint

Custom object { name, type, allowed_callers, 3 more }

A custom tool that processes input using a specified format. Learn more about custom tools

name: string

The name of the custom tool, used to identify it in tool calls.

type: "custom"

The type of the custom tool. Always custom.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
defer_loading: optional boolean

Whether this tool should be deferred and discovered via tool search.

description: optional string

Optional description of the custom tool, used to provide more context.

format: optional CustomToolInputFormat

The input format for the custom tool. Default is unconstrained text.

Namespace object { description, name, tools, type }

Groups function/custom tools under a shared namespace.

description: string

A description of the namespace shown to the model.

name: string

The namespace name used in tool calls (for example, crm).

minLength1
tools: array of object { name, type, allowed_callers, 5 more } or object { name, type, allowed_callers, 3 more }

The function/custom tools available inside this namespace.

One of the following:
Function object { name, type, allowed_callers, 5 more }
name: string
minLength1
maxLength128
type: "function"
allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
defer_loading: optional boolean

Whether this function should be deferred and discovered via tool search.

description: optional string or null
output_schema: optional map[unknown] or null

A JSON Schema describing the JSON value encoded in string outputs for this function tool. This does not describe content-array outputs.

parameters: optional unknown or null
strict: optional boolean or null

Whether to enforce strict parameter validation. If omitted, Responses attempts to use strict validation when the schema is compatible, and falls back to non-strict validation otherwise.

Custom object { name, type, allowed_callers, 3 more }

A custom tool that processes input using a specified format. Learn more about custom tools

name: string

The name of the custom tool, used to identify it in tool calls.

type: "custom"

The type of the custom tool. Always custom.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
defer_loading: optional boolean

Whether this tool should be deferred and discovered via tool search.

description: optional string

Optional description of the custom tool, used to provide more context.

format: optional CustomToolInputFormat

The input format for the custom tool. Default is unconstrained text.

type: "namespace"

The type of the tool. Always namespace.

ToolSearch object { type, description, execution, parameters }

Hosted or BYOT tool search configuration for deferred tools.

type: "tool_search"

The type of the tool. Always tool_search.

description: optional string or null

Description shown to the model for a client-executed tool search tool.

execution: optional "server" or "client"

Whether tool search is executed by the server or by the client.

One of the following:
"server"
"client"
parameters: optional unknown or null

Parameter schema for a client-executed tool search tool.

WebSearchPreview object { type, search_content_types, search_context_size, user_location }

This tool searches the web for relevant results to use in a response. Learn more about the web search tool.

type: "web_search_preview" or "web_search_preview_2025_03_11"

The type of the web search tool. One of web_search_preview or web_search_preview_2025_03_11.

One of the following:
"web_search_preview"
"web_search_preview_2025_03_11"
search_content_types: optional array of "text" or "image"
One of the following:
"text"
"image"
search_context_size: optional "low" or "medium" or "high"

High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.

One of the following:
"low"
"medium"
"high"
user_location: optional object { type, city, country, 2 more } or null

The user’s location.

type: "approximate"

The type of location approximation. Always approximate.

city: optional string or null

Free text input for the city of the user, e.g. San Francisco.

country: optional string or null

The two-letter ISO country code of the user, e.g. US.

region: optional string or null

Free text input for the region of the user, e.g. California.

timezone: optional string or null

The IANA timezone of the user, e.g. America/Los_Angeles.

ApplyPatch object { type, allowed_callers }

Allows the assistant to create, delete, or update files using unified diffs.

type: "apply_patch"

The type of the tool. Always apply_patch.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
type: "tool_search_output"

The type of the item. Always tool_search_output.

created_by: optional string

The identifier of the actor that created the item.

AdditionalTools object { id, role, tools, type }
id: string

The unique ID of the additional tools item.

role: "unknown" or "user" or "assistant" or 5 more

The role that provided the additional tools.

One of the following:
"unknown"
"user"
"assistant"
"system"
"critic"
"discriminator"
"developer"
"tool"
tools: array of object { name, parameters, strict, 5 more } or object { type, vector_store_ids, filters, 2 more } or object { type } or 13 more

The additional tool definitions made available at this item.

One of the following:
Function object { name, parameters, strict, 5 more }

Defines a function in your own code the model can choose to call. Learn more about function calling.

name: string

The name of the function to call.

parameters: map[unknown] or null

A JSON schema object describing the parameters of the function.

strict: boolean or null

Whether strict parameter validation is enforced for this function tool.

type: "function"

The type of the function tool. Always function.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
defer_loading: optional boolean

Whether this function is deferred and loaded via tool search.

description: optional string or null

A description of the function. Used by the model to determine whether or not to call the function.

output_schema: optional map[unknown] or null

A JSON schema object describing the JSON value encoded in string outputs for this function.

FileSearch object { type, vector_store_ids, filters, 2 more }

A tool that searches for relevant content from uploaded files. Learn more about the file search tool.

type: "file_search"

The type of the file search tool. Always file_search.

vector_store_ids: array of string

The IDs of the vector stores to search.

filters: optional ComparisonFilter { key, type, value } or CompoundFilter { filters, type } or null

A filter to apply.

One of the following:
ComparisonFilter object { key, type, value }

A filter used to compare a specified attribute key to a given value using a defined comparison operation.

key: string

The key to compare against the value.

type: "eq" or "ne" or "gt" or 5 more

Specifies the comparison operator: eq, ne, gt, gte, lt, lte, in, nin.

  • eq: equals
  • ne: not equal
  • gt: greater than
  • gte: greater than or equal
  • lt: less than
  • lte: less than or equal
  • in: in
  • nin: not in
One of the following:
"eq"
"ne"
"gt"
"gte"
"lt"
"lte"
"in"
"nin"
value: string or number or boolean or array of string or number

The value to compare against the attribute key; supports string, number, or boolean types.

One of the following:
string
number
boolean
array of string or number
One of the following:
string
number
CompoundFilter object { filters, type }

Combine multiple filters using and or or.

filters: array of ComparisonFilter { key, type, value } or unknown

Array of filters to combine. Items can be ComparisonFilter or CompoundFilter.

One of the following:
ComparisonFilter object { key, type, value }

A filter used to compare a specified attribute key to a given value using a defined comparison operation.

key: string

The key to compare against the value.

type: "eq" or "ne" or "gt" or 5 more

Specifies the comparison operator: eq, ne, gt, gte, lt, lte, in, nin.

  • eq: equals
  • ne: not equal
  • gt: greater than
  • gte: greater than or equal
  • lt: less than
  • lte: less than or equal
  • in: in
  • nin: not in
One of the following:
"eq"
"ne"
"gt"
"gte"
"lt"
"lte"
"in"
"nin"
value: string or number or boolean or array of string or number

The value to compare against the attribute key; supports string, number, or boolean types.

One of the following:
string
number
boolean
array of string or number
One of the following:
string
number
unknown
type: "and" or "or"

Type of operation: and or or.

One of the following:
"and"
"or"
max_num_results: optional number

The maximum number of results to return. This number should be between 1 and 50 inclusive.

ranking_options: optional object { hybrid_search, ranker, score_threshold }

Ranking options for search.

ranker: optional "auto" or "default-2024-11-15"

The ranker to use for the file search.

One of the following:
"auto"
"default-2024-11-15"
score_threshold: optional number

The score threshold for the file search, a number between 0 and 1. Numbers closer to 1 will attempt to return only the most relevant results, but may return fewer results.

Computer object { type }

A tool that controls a virtual computer. Learn more about the computer tool.

type: "computer"

The type of the computer tool. Always computer.

ComputerUsePreview object { display_height, display_width, environment, type }

A tool that controls a virtual computer. Learn more about the computer tool.

display_height: number

The height of the computer display.

display_width: number

The width of the computer display.

environment: "windows" or "mac" or "linux" or 2 more

The type of computer environment to control.

One of the following:
"windows"
"mac"
"linux"
"ubuntu"
"browser"
type: "computer_use_preview"

The type of the computer use tool. Always computer_use_preview.

WebSearch object { type, external_web_access, filters, 2 more }

Search the Internet for sources related to the prompt. Learn more about the web search tool.

type: "web_search" or "web_search_2025_08_26"

The type of the web search tool. One of web_search or web_search_2025_08_26.

One of the following:
"web_search"
"web_search_2025_08_26"
external_web_access: optional boolean

Allow live internet access for web search. Defaults to true when omitted. When false, the web search tool runs in offline/cache-only mode and will not fetch new external content.

filters: optional object { allowed_domains } or null

Filters for the search.

allowed_domains: optional array of string or null

Allowed domains for the search. If not provided, all domains are allowed. Subdomains of the provided domains are allowed as well.

Example: ["pubmed.ncbi.nlm.nih.gov"]

search_context_size: optional "low" or "medium" or "high"

High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.

One of the following:
"low"
"medium"
"high"
user_location: optional object { city, country, region, 2 more } or null

The approximate location of the user.

city: optional string or null

Free text input for the city of the user, e.g. San Francisco.

country: optional string or null

The two-letter ISO country code of the user, e.g. US.

region: optional string or null

Free text input for the region of the user, e.g. California.

timezone: optional string or null

The IANA timezone of the user, e.g. America/Los_Angeles.

type: optional "approximate"

The type of location approximation. Always approximate.

Mcp object { server_label, type, allowed_callers, 9 more }

Give the model access to additional tools via remote Model Context Protocol (MCP) servers. Learn more about MCP.

server_label: string

A label for this MCP server, used to identify it in tool calls.

type: "mcp"

The type of the MCP tool. Always mcp.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
allowed_tools: optional array of string or object { read_only, tool_names } or null

List of allowed tool names or a filter object.

One of the following:
McpAllowedTools = array of string

A string array of allowed tool names

McpToolFilter object { read_only, tool_names }

A filter object to specify which tools are allowed.

read_only: optional boolean

Indicates whether or not a tool modifies data or is read-only. If an MCP server is annotated with readOnlyHint, it will match this filter.

tool_names: optional array of string

List of allowed tool names.

authorization: optional string

An OAuth access token that can be used with a remote MCP server, either with a custom MCP server URL or a service connector. Your application must handle the OAuth authorization flow and provide the token here.

connector_id: optional "connector_dropbox" or "connector_gmail" or "connector_googlecalendar" or 5 more

Identifier for service connectors, like those available in ChatGPT. One of server_url, connector_id, or tunnel_id must be provided. Learn more about service connectors here.

Currently supported connector_id values are:

  • Dropbox: connector_dropbox
  • Gmail: connector_gmail
  • Google Calendar: connector_googlecalendar
  • Google Drive: connector_googledrive
  • Microsoft Teams: connector_microsoftteams
  • Outlook Calendar: connector_outlookcalendar
  • Outlook Email: connector_outlookemail
  • SharePoint: connector_sharepoint
One of the following:
"connector_dropbox"
"connector_gmail"
"connector_googlecalendar"
"connector_googledrive"
"connector_microsoftteams"
"connector_outlookcalendar"
"connector_outlookemail"
"connector_sharepoint"
defer_loading: optional boolean

Whether this MCP tool is deferred and discovered via tool search.

headers: optional map[string] or null

Optional HTTP headers to send to the MCP server. Use for authentication or other purposes.

require_approval: optional object { always, never } or "always" or "never" or null

Specify which of the MCP server’s tools require approval.

One of the following:
McpToolApprovalFilter object { always, never }

Specify which of the MCP server’s tools require approval. Can be always, never, or a filter object associated with tools that require approval.

always: optional object { read_only, tool_names }

A filter object to specify which tools are allowed.

read_only: optional boolean

Indicates whether or not a tool modifies data or is read-only. If an MCP server is annotated with readOnlyHint, it will match this filter.

tool_names: optional array of string

List of allowed tool names.

never: optional object { read_only, tool_names }

A filter object to specify which tools are allowed.

read_only: optional boolean

Indicates whether or not a tool modifies data or is read-only. If an MCP server is annotated with readOnlyHint, it will match this filter.

tool_names: optional array of string

List of allowed tool names.

McpToolApprovalSetting = "always" or "never"

Specify a single approval policy for all tools. One of always or never. When set to always, all tools will require approval. When set to never, all tools will not require approval.

One of the following:
"always"
"never"
server_description: optional string

Optional description of the MCP server, used to provide more context.

server_url: optional string

The URL for the MCP server. One of server_url, connector_id, or tunnel_id must be provided.

formaturi
tunnel_id: optional string

The Secure MCP Tunnel ID to use instead of a direct server URL. One of server_url, connector_id, or tunnel_id must be provided.

CodeInterpreter object { container, type, allowed_callers }

A tool that runs Python code to help generate a response to a prompt.

container: string or object { type, file_ids, memory_limit, network_policy }

The code interpreter container. Can be a container ID or an object that specifies uploaded file IDs to make available to your code, along with an optional memory_limit setting.

One of the following:
string

The container ID.

CodeInterpreterToolAuto object { type, file_ids, memory_limit, network_policy }

Configuration for a code interpreter container. Optionally specify the IDs of the files to run the code on.

type: "auto"

Always auto.

file_ids: optional array of string

An optional list of uploaded files to make available to your code.

memory_limit: optional "1g" or "4g" or "16g" or "64g" or null

The memory limit for the code interpreter container.

One of the following:
"1g"
"4g"
"16g"
"64g"
network_policy: optional ContainerNetworkPolicyDisabled { type } or ContainerNetworkPolicyAllowlist { allowed_domains, type, domain_secrets }

Network access policy for the container.

One of the following:
ContainerNetworkPolicyDisabled object { type }
type: "disabled"

Disable outbound network access. Always disabled.

ContainerNetworkPolicyAllowlist object { allowed_domains, type, domain_secrets }
allowed_domains: array of string

A list of allowed domains when type is allowlist.

type: "allowlist"

Allow outbound network access only to specified domains. Always allowlist.

domain_secrets: optional array of ContainerNetworkPolicyDomainSecret { domain, name, value }

Optional domain-scoped secrets for allowlisted domains.

domain: string

The domain associated with the secret.

minLength1
name: string

The name of the secret to inject for the domain.

minLength1
value: string

The secret value to inject for the domain.

minLength1
maxLength10485760
type: "code_interpreter"

The type of the code interpreter tool. Always code_interpreter.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
ProgrammaticToolCalling object { type }
type: "programmatic_tool_calling"

The type of the tool. Always programmatic_tool_calling.

ImageGeneration object { type, action, background, 9 more }

A tool that generates images using the GPT image models.

type: "image_generation"

The type of the image generation tool. Always image_generation.

action: optional "generate" or "edit" or "auto"

Whether to generate a new image or edit an existing image. Default: auto.

One of the following:
"generate"
"edit"
"auto"
background: optional "transparent" or "opaque" or "auto"

Background type for the generated image. One of transparent, opaque, or auto. Default: auto.

One of the following:
"transparent"
"opaque"
"auto"
input_fidelity: optional "high" or "low" or null

Control how much effort the model will exert to match the style and features, especially facial features, of input images. This parameter is only supported for gpt-image-1 and gpt-image-1.5 and later models, unsupported for gpt-image-1-mini. Supports high and low. Defaults to low.

One of the following:
"high"
"low"
input_image_mask: optional object { file_id, image_url }

Optional mask for inpainting. Contains image_url (string, optional) and file_id (string, optional).

file_id: optional string

File ID for the mask image.

image_url: optional string

Base64-encoded mask image.

model: optional string or "gpt-image-1" or "gpt-image-1-mini" or "gpt-image-1.5"

The image generation model to use. Default: gpt-image-1.

One of the following:
string
"gpt-image-1" or "gpt-image-1-mini" or "gpt-image-1.5"

The image generation model to use. Default: gpt-image-1.

One of the following:
"gpt-image-1"
"gpt-image-1-mini"
"gpt-image-1.5"
moderation: optional "auto" or "low"

Moderation level for the generated image. Default: auto.

One of the following:
"auto"
"low"
output_compression: optional number

Compression level for the output image. Default: 100.

minimum0
maximum100
output_format: optional "png" or "webp" or "jpeg"

The output format of the generated image. One of png, webp, or jpeg. Default: png.

One of the following:
"png"
"webp"
"jpeg"
partial_images: optional number

Number of partial images to generate in streaming mode, from 0 (default value) to 3.

minimum0
maximum3
quality: optional "low" or "medium" or "high" or "auto"

The quality of the generated image. One of low, medium, high, or auto. Default: auto.

One of the following:
"low"
"medium"
"high"
"auto"
size: optional string or "1024x1024" or "1024x1536" or "1536x1024" or "auto"

The size of the generated images. For gpt-image-2 and gpt-image-2-2026-04-21, arbitrary resolutions are supported as WIDTHxHEIGHT strings, for example 1536x864. Width and height must both be divisible by 16 and the requested aspect ratio must be between 1:3 and 3:1. Resolutions above 2560x1440 are experimental, and the maximum supported resolution is 3840x2160. The requested size must also satisfy the model’s current pixel and edge limits. The standard sizes 1024x1024, 1536x1024, and 1024x1536 are supported by the GPT image models; auto is supported for models that allow automatic sizing. For dall-e-2, use one of 256x256, 512x512, or 1024x1024. For dall-e-3, use one of 1024x1024, 1792x1024, or 1024x1792.

One of the following:
string
"1024x1024" or "1024x1536" or "1536x1024" or "auto"

The size of the generated images. For gpt-image-2 and gpt-image-2-2026-04-21, arbitrary resolutions are supported as WIDTHxHEIGHT strings, for example 1536x864. Width and height must both be divisible by 16 and the requested aspect ratio must be between 1:3 and 3:1. Resolutions above 2560x1440 are experimental, and the maximum supported resolution is 3840x2160. The requested size must also satisfy the model’s current pixel and edge limits. The standard sizes 1024x1024, 1536x1024, and 1024x1536 are supported by the GPT image models; auto is supported for models that allow automatic sizing. For dall-e-2, use one of 256x256, 512x512, or 1024x1024. For dall-e-3, use one of 1024x1024, 1792x1024, or 1024x1792.

One of the following:
"1024x1024"
"1024x1536"
"1536x1024"
"auto"
LocalShell object { type }

A tool that allows the model to execute shell commands in a local environment.

type: "local_shell"

The type of the local shell tool. Always local_shell.

Shell object { type, allowed_callers, environment }

A tool that allows the model to execute shell commands.

type: "shell"

The type of the shell tool. Always shell.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
environment: optional ContainerAuto { type, file_ids, memory_limit, 2 more } or LocalEnvironment { type, skills } or ContainerReference { container_id, type } or null
One of the following:
ContainerAuto object { type, file_ids, memory_limit, 2 more }
type: "container_auto"

Automatically creates a container for this request

file_ids: optional array of string

An optional list of uploaded files to make available to your code.

memory_limit: optional "1g" or "4g" or "16g" or "64g" or null

The memory limit for the container.

One of the following:
"1g"
"4g"
"16g"
"64g"
network_policy: optional ContainerNetworkPolicyDisabled { type } or ContainerNetworkPolicyAllowlist { allowed_domains, type, domain_secrets }

Network access policy for the container.

One of the following:
ContainerNetworkPolicyDisabled object { type }
type: "disabled"

Disable outbound network access. Always disabled.

ContainerNetworkPolicyAllowlist object { allowed_domains, type, domain_secrets }
allowed_domains: array of string

A list of allowed domains when type is allowlist.

type: "allowlist"

Allow outbound network access only to specified domains. Always allowlist.

domain_secrets: optional array of ContainerNetworkPolicyDomainSecret { domain, name, value }

Optional domain-scoped secrets for allowlisted domains.

domain: string

The domain associated with the secret.

minLength1
name: string

The name of the secret to inject for the domain.

minLength1
value: string

The secret value to inject for the domain.

minLength1
maxLength10485760
skills: optional array of SkillReference { skill_id, type, version } or InlineSkill { description, name, source, type }

An optional list of skills referenced by id or inline data.

One of the following:
SkillReference object { skill_id, type, version }
skill_id: string

The ID of the referenced skill.

minLength1
maxLength64
type: "skill_reference"

References a skill created with the /v1/skills endpoint.

version: optional string

Optional skill version. Use a positive integer or ‘latest’. Omit for default.

InlineSkill object { description, name, source, type }
description: string

The description of the skill.

name: string

The name of the skill.

source: InlineSkillSource { data, media_type, type }

Inline skill payload

type: "inline"

Defines an inline skill for this request.

LocalEnvironment object { type, skills }
type: "local"

Use a local computer environment.

skills: optional array of LocalSkill { description, name, path }

An optional list of skills.

description: string

The description of the skill.

name: string

The name of the skill.

path: string

The path to the directory containing the skill.

ContainerReference object { container_id, type }
container_id: string

The ID of the referenced container.

type: "container_reference"

References a container created with the /v1/containers endpoint

Custom object { name, type, allowed_callers, 3 more }

A custom tool that processes input using a specified format. Learn more about custom tools

name: string

The name of the custom tool, used to identify it in tool calls.

type: "custom"

The type of the custom tool. Always custom.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
defer_loading: optional boolean

Whether this tool should be deferred and discovered via tool search.

description: optional string

Optional description of the custom tool, used to provide more context.

format: optional CustomToolInputFormat

The input format for the custom tool. Default is unconstrained text.

Namespace object { description, name, tools, type }

Groups function/custom tools under a shared namespace.

description: string

A description of the namespace shown to the model.

name: string

The namespace name used in tool calls (for example, crm).

minLength1
tools: array of object { name, type, allowed_callers, 5 more } or object { name, type, allowed_callers, 3 more }

The function/custom tools available inside this namespace.

One of the following:
Function object { name, type, allowed_callers, 5 more }
name: string
minLength1
maxLength128
type: "function"
allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
defer_loading: optional boolean

Whether this function should be deferred and discovered via tool search.

description: optional string or null
output_schema: optional map[unknown] or null

A JSON Schema describing the JSON value encoded in string outputs for this function tool. This does not describe content-array outputs.

parameters: optional unknown or null
strict: optional boolean or null

Whether to enforce strict parameter validation. If omitted, Responses attempts to use strict validation when the schema is compatible, and falls back to non-strict validation otherwise.

Custom object { name, type, allowed_callers, 3 more }

A custom tool that processes input using a specified format. Learn more about custom tools

name: string

The name of the custom tool, used to identify it in tool calls.

type: "custom"

The type of the custom tool. Always custom.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
defer_loading: optional boolean

Whether this tool should be deferred and discovered via tool search.

description: optional string

Optional description of the custom tool, used to provide more context.

format: optional CustomToolInputFormat

The input format for the custom tool. Default is unconstrained text.

type: "namespace"

The type of the tool. Always namespace.

ToolSearch object { type, description, execution, parameters }

Hosted or BYOT tool search configuration for deferred tools.

type: "tool_search"

The type of the tool. Always tool_search.

description: optional string or null

Description shown to the model for a client-executed tool search tool.

execution: optional "server" or "client"

Whether tool search is executed by the server or by the client.

One of the following:
"server"
"client"
parameters: optional unknown or null

Parameter schema for a client-executed tool search tool.

WebSearchPreview object { type, search_content_types, search_context_size, user_location }

This tool searches the web for relevant results to use in a response. Learn more about the web search tool.

type: "web_search_preview" or "web_search_preview_2025_03_11"

The type of the web search tool. One of web_search_preview or web_search_preview_2025_03_11.

One of the following:
"web_search_preview"
"web_search_preview_2025_03_11"
search_content_types: optional array of "text" or "image"
One of the following:
"text"
"image"
search_context_size: optional "low" or "medium" or "high"

High level guidance for the amount of context window space to use for the search. One of low, medium, or high. medium is the default.

One of the following:
"low"
"medium"
"high"
user_location: optional object { type, city, country, 2 more } or null

The user’s location.

type: "approximate"

The type of location approximation. Always approximate.

city: optional string or null

Free text input for the city of the user, e.g. San Francisco.

country: optional string or null

The two-letter ISO country code of the user, e.g. US.

region: optional string or null

Free text input for the region of the user, e.g. California.

timezone: optional string or null

The IANA timezone of the user, e.g. America/Los_Angeles.

ApplyPatch object { type, allowed_callers }

Allows the assistant to create, delete, or update files using unified diffs.

type: "apply_patch"

The type of the tool. Always apply_patch.

allowed_callers: optional array of "direct" or "programmatic" or null

The tool invocation context(s).

One of the following:
"direct"
"programmatic"
type: "additional_tools"

The type of the item. Always additional_tools.

FunctionCallOutput object { output, type, id, 5 more }

The output of a function tool call.

output: string or array of ResponseInputText { text, type, prompt_cache_breakpoint } or ResponseInputImage { detail, type, file_id, 2 more } or ResponseInputFile { type, detail, file_data, 4 more }

The output from the function call generated by your code. Can be a string or an list of output content.

One of the following:
StringOutput = string

A string of the output of the function call.

OutputContentList = array of ResponseInputText { text, type, prompt_cache_breakpoint } or ResponseInputImage { detail, type, file_id, 2 more } or ResponseInputFile { type, detail, file_data, 4 more }

Text, image, or file output of the function call.

One of the following:
ResponseInputText object { text, type, prompt_cache_breakpoint }

A text input to the model.

text: string

The text input to the model.

type: "input_text"

The type of the input item. Always input_text.

prompt_cache_breakpoint: optional object { mode }

Marks the exact end of a reusable prompt prefix. The breakpoint inherits its TTL from the request’s prompt_cache_options.ttl; the boundary is not rounded to a token block.

mode: "explicit"

The breakpoint mode. Always explicit.

ResponseInputImage object { detail, type, file_id, 2 more }

An image input to the model. Learn about image inputs.

detail: ImageDetail

The detail level of the image to be sent to the model. One of high, low, auto, or original. Defaults to auto.

type: "input_image"

The type of the input item. Always input_image.

file_id: optional string or null

The ID of the file to be sent to the model.

image_url: optional string or null

The URL of the image to be sent to the model. A fully qualified URL or base64 encoded image in a data URL.

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prompt_cache_breakpoint: optional object { mode }

Marks the exact end of a reusable prompt prefix. The breakpoint inherits its TTL from the request’s prompt_cache_options.ttl; the boundary is not rounded to a token block.

mode: "explicit"

The breakpoint mode. Always explicit.

ResponseInputFile object { type, detail, file_data, 4 more }

A file input to the model.

type: "input_file"

The type of the input item. Always input_file.

detail: optional "auto" or "low" or "high"

The detail level of the file to be sent to the model. Use auto to let the system select the detail level; for GPT-5.6 and later models, auto uses high-quality rendering, which may increase input token usage. Use low for lower-cost rendering, or high to render the file at higher quality. Defaults to auto.

One of the following:
"auto"
"low"
"high"
file_data: optional string

The content of the file to be sent to the model.

file_id: optional string or null

The ID of the file to be sent to the model.

file_url: optional string

The URL of the file to be sent to the model.

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filename: optional string

The name of the file to be sent to the model.

prompt_cache_breakpoint: optional object { mode }

Marks the exact end of a reusable prompt prefix. The breakpoint inherits its TTL from the request’s prompt_cache_options.ttl; the boundary is not rounded to a token block.

mode: "explicit"

The breakpoint mode. Always explicit.

type: "function_call_output"

The type of the function tool call output. Always function_call_output.

id: optional string

The unique ID of the function tool call output. Populated when this item is returned via API.

call_id: optional string

The unique ID of the function tool call generated by the model.

caller: optional object { type } or object { caller_id, type } or null

The execution context that produced this tool call.

One of the following:
Direct object { type }
type: "direct"

The caller type. Always direct.

Program object { caller_id, type }
caller_id: string

The call ID of the program item that produced this tool call.

minLength1
maxLength64
type: "program"

The caller type. Always program.

name: optional string

The name of the tool that produced the output.

namespace: optional string

The namespace of the tool that produced the output.

status: optional "in_progress" or "completed" or "incomplete"

The status of the item. One of in_progress, completed, or incomplete. Populated when items are returned via API.

One of the following:
"in_progress"
"completed"
"incomplete"
FileSearchCall object { id, queries, status, 2 more }

The results of a file search tool call. See the file search guide for more information.

id: string

The unique ID of the file search tool call.

queries: array of string

The queries used to search for files.

status: "in_progress" or "searching" or "completed" or 2 more

The status of the file search tool call. One of in_progress, searching, incomplete or failed,

One of the following:
"in_progress"
"searching"
"completed"
"incomplete"
"failed"
type: "file_search_call"

The type of the file search tool call. Always file_search_call.

results: optional array of object { attributes, file_id, filename, 2 more } or null

The results of the file search tool call.

attributes: optional map[string or number or boolean] or null

Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format, and querying for objects via API or the dashboard. Keys are strings with a maximum length of 64 characters. Values are strings with a maximum length of 512 characters, booleans, or numbers.

One of the following:
string
number
boolean
file_id: optional string

The unique ID of the file.

filename: optional string

The name of the file.

score: optional number

The relevance score of the file - a value between 0 and 1.

formatfloat
text: optional string

The text that was retrieved from the file.

WebSearchCall object { id, action, status, type }

The results of a web search tool call. See the web search guide for more information.

id: string

The unique ID of the web search tool call.

action: object { type, queries, query, sources } or object { type, url } or object { pattern, type, url }

An object describing the specific action taken in this web search call. Includes details on how the model used the web (search, open_page, find_in_page).

One of the following:
Search object { type, queries, query, sources }

Action type “search” - Performs a web search query.

type: "search"

The action type.

queries: optional array of string

The search queries.

Deprecatedquery: optional string

The search query.

sources: optional array of object { type, url }

The sources used in the search.

type: "url"

The type of source. Always url.

url: string

The URL of the source.

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OpenPage object { type, url }

Action type “open_page” - Opens a specific URL from search results.

type: "open_page"

The action type.

url: optional string or null

The URL opened by the model.

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FindInPage object { pattern, type, url }

Action type “find_in_page”: Searches for a pattern within a loaded page.

pattern: string

The pattern or text to search for within the page.

type: "find_in_page"

The action type.

url: string

The URL of the page searched for the pattern.

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status: "in_progress" or "searching" or "completed" or "failed"

The status of the web search tool call.

One of the following:
"in_progress"
"searching"
"completed"
"failed"
type: "web_search_call"

The type of the web search tool call. Always web_search_call.

ImageGenerationCall object { id, result, status, type }

An image generation request made by the model.

id: string

The unique ID of the image generation call.

result: string or null

The generated image encoded in base64.

status: "in_progress" or "completed" or "generating" or "failed"

The status of the image generation call.

One of the following:
"in_progress"
"completed"
"generating"