I Tested 6 AI Coding Assistants for a Month. Here's What Actually Works.

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:

1. Building from scratch — Create a full-stack todo app
2. Debugging — Find and fix bugs in a messy codebase
3. Refactoring — Clean up legacy code
4. Code review — Spot issues in PRs
5. Documentation — Generate docs from code

The Results

🥇 Cursor IDE — Best All-Rounder

Best IDE integration with proper context awareness. Understands your entire codebase, not just the file you're editing. Perfect for daily development work.

🥈 Claude Codex CLI — Best for Complex Refactoring

Terminal-native workflow is surprisingly productive once you get past the learning curve. Handles multi-file refactoring better than any competitor. The reasoning depth is unmatched.

🥉 Windsurf — Fastest Rising

Catching up fast with multi-file editing capabilities. Good polish and reasonable pricing.

GitHub Copilot — Still Solid

The original AI coding assistant remains reliable for inline suggestions. The "Copilot Chat" feature has improved significantly.

Gemini Code Assist — The Surprise

With its 1M token context window, it can process entire codebases in one go. Google's integration with their ecosystem is a nice bonus.

ChatGPT Codex CLI — Good but Not Specialized

Solid all-rounder but doesn't excel in any specific area compared to specialized tools.

The Surprise

The best all-rounder isn't Claude or ChatGPT. Cursor IDE combined the best IDE experience with strong AI capabilities. But for different workflows, different tools win.

My Recommendation

• Daily development: Cursor IDE
• Heavy refactoring: Claude Codex CLI
• Budget option: Windsurf
• Full codebase analysis: Gemini Code Assist

TL;DR

There's no single "best" AI coding assistant — it depends on your workflow. But if I had to pick one for daily use, Cursor wins on polish and context awareness.

---

For detailed breakdowns with test scores and code samples, check out the full reviews at toolsdepth.com.