Why do some people use both Claude Code AND ChatGPT Codex for one project?
I'm building an app with AI, and Claude Code alone handles the coding fine — but I keep seeing people run ChatGPT Codex alongside it. What's the benefit? Do they do different jobs?
I treat Claude Code as the team that writes the code, and ChatGPT Codex as the team that reviews it. Claude Code does the actual coding plus the commits and pushes; Codex reviews what it wrote and catches things. It's not mandatory. If you're just starting, Claude Code alone is plenty. Add Codex as your reviewer once code quality and review actually start to matter.