I've been on the codex train for a few months now for personal stuff, but have Claude at work. I always tell people it's as good if not better than CC, but it has different strengths and weaknesses.
Claude was more autonomous and still is a little, but I think GPT 5.5 closed that gap a lot. Claude is far better at front end design. I think it's still better at big picture planning.
Codex is far better at code review and catching bugs that actually matter. I think it's better at following directions, although I think that regressed a bit with 5.5 (flip side of the autonomy I mentioned earlier). A lot of CC users claim to not like Codex's personality (or lack of), but personally I prefer it.
Claude was more autonomous and still is a little, but I think GPT 5.5 closed that gap a lot. Claude is far better at front end design. I think it's still better at big picture planning.
Codex is far better at code review and catching bugs that actually matter. I think it's better at following directions, although I think that regressed a bit with 5.5 (flip side of the autonomy I mentioned earlier). A lot of CC users claim to not like Codex's personality (or lack of), but personally I prefer it.