I spent a month testing Claude Codex, ChatGPT Codex, Cursor, Windsurf, GitHub Copilot, and Gemini...
Six AI coding assistants tested over a month on five real tasks found no universal winner. Cursor leads for daily dev, Claude Codex CLI for multi-file refactoring, Gemini for full-codebase analysis (1M-token context): stack choice should be workflow-driven.
I spent a month testing Claude Codex, ChatGPT Codex, Cursor, Windsurf, GitHub Copilot, and Gemini Code Assist side by side.
Why This Matters
Developers are drowning in AI tool choices. Every week there's a new "game-changing" coding assistant. But which ones actually save time versus look cool in demos?
I put 6 leading AI coding assistants through 5 real-world development tasks:
Building from scratch — Create a full-stack todo app
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