I guess it depends a lot on what kind of programming you are doing. Claude Opus, even Sonnet, are significantly better at frontend development than Codex.

Claude seems to write the exact code that you expect, about 90% of the time, and consistently follows project standards; while Codex goes on wild goose chases creating unnecessary indirection and abstractions – they work correctly, but add cruft. I can spot both with decent confidence in the project I’m currently working.