Work I have access to both Claude Code and Codex. Use them both, typically on the same work. I like to do brainstorming and solution design with Codex GPT 5.5 High, and then have Claude Opus 4.7/4.8 high/medium do the implementation.
So far been quite productive for some greenfield rewrites and refactors of existing code. Though bug fixing our main project it's more hit and miss, though Codex GPT 5.5 High can be very good at spotting subtle issues.