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Harnesses

  • GitHub co-pilot (Microsoft)

    • In VS Code
    • CLI
    • GitHub UI to chat
    • GitHub Issues - assign to copilot
    • Available Models (from other vendors)
      • GPT-5.4
      • GPT-5.3-Codex
      • GPT-5.2
      • GPT-5.4 mini
      • GPT-5 mini
      • GPT-4.1
      • Claude Sonnet 4.6
      • Claude Haiku 4.5

  • Cursor

    • A modified version of VS Code. An independent startup.

  • Codex (OpenAI)

    • In VS Code
    • CLI

  • Gemini Code Assist (Google)

    • In VS Code
    • Gemini CLI is deprecated
    • Antigravity CLI

  • Claude Code (Anthropic)

    • CLI - It is a command line tool.
    • It can work as an extension in major IDEs.

  • Windsurf (Codeium)

    • Stand alone editor
    • Plugin to JetBrains, VS Code etc.

  • Tabnine