DeepSeek's top-ranked V4 Flash stumbles on real agent tasks as its prices surge

DeepSeek&#x27;s V4 Flash has topped model leaderboards and been hailed by developers as a "total monster" since its rollout. But in real-world testing, it completed just 53.8% of a batch of complex agent tasks. Composio ran the model through eight different agent harnesses , including Claude Code, Codex, and OpenCode, on 30 deliberately difficult, multi-step tasks spanning live tools like Gmail,…