Comparing AI Harnesses: OpenCode, Ollama, LM Studio, Claude Code, Open WebUI, and VS Code

Every week there’s a new AI coding tool. I’ve been testing the ones that actually matter: OpenCode , Ollama , LM Studio , Claude Code , Open WebUI , and VS Code with Copilot . They all take different approaches and honestly some of them aren’t even the same kind of thing. Let me explain. The quick version Open Source Runs Offline Has Agent Tools Cost OpenCode Yes (MIT) Yes Yes, 15 built-in Free…