In March 2026, I made a rule: every piece of non-trivial code I write has to go through at least one AI coding agent before I commit it. Not for autocomplete — for the whole thing. Architecture decisions, test generation, refactoring, debugging. The full workflow.
I used three tools in rotation: Claude Code, OpenCode, and OpenAI Codex CLI. All on the same projects — a Spring Boot microservice, a Flutter mobile app, and a personal side project in Python. Thirty days, 100+ hours of active coding across all three.
A note on scope: I deliberately chose terminal-first agents, not IDE-integrated tools like Cursor or GitHub Copilot. My workflow already lives in the terminal, and I wanted agents that reason about entire codebases rather than just the file I have open. If you're evaluating Cursor, this comparison won't map directly.
Here's what actually happened.
This is a preview. Read the full article on Medium: I Tested Claude Code, OpenCode, and Codex for 30 Days — Here's My Verdict
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