GitHub Copilot vs Codex CLI: Which Is Better in 2026
Last month, I spent three hours debugging a nasty race condition in a Rust codebase. I had two terminals open—Codex CLI on the left, GitHub Copilot CLI on the right—and I kept bouncing between them like some kind of AI-powered ping-pong match. By the end of that session, I had a clear winner, but probably not for the reasons you'd expect.
Here's the thing: both tools have matured significantly since their 2025 releases. But they're solving