It helps a lot that Claude is just better. Codex isn't BAD, and in some narrow technical ways might even be more capable, but I find Claude to be hands-down the best collaborator of all the AI models and it has never been close.
Can you expand on that. I've been wanting to try Claude for a while, but their payment processing wouldn't take any of my credit cards (they work everywhere else, so it's not the cards). I've heard I can work around this by installing their mobile app or something, but it was extra hurdles, so I didn't try very hard. And I've been absolutely amazed with Codex. I started using that with version ChatGPT 5.3-Codex, and…
Claude, IMO, is much better at empathizing with me as a user: It asks better questions, tries harder to understand WHY I'm trying to do something, and is more likely to tell me if there's a better way.
Both have plenty of flaws. Codex might be better if you want to set it loose on a well-defined problem and let it churn overnight. But if you want a back-and-forth collaboration, I find Claude far better.