Claude Code or Codex is the wrong question.You can (actually) run both.Ask these 4 questions instead:Both read your repo, edit files and run commands.The defaults are what actually separate them.1. Where do you want to work?Claude Code centres on the terminal.Codex spans app, IDE, cloud and GitHub by default.Pick the surface you already work in.2. How do you split up the work?Both can run agents in parallel.Claude Code delegates to subagents in one session.Codex fans work out to threads you supe