If you mean Codex is better at planning, I've heard the exact opposite. I'm told it's a beast if you tell it exactly what you need as it will execute it to the T whereas Claude will push back or do its own thing either because it thinks it's wrong or because it's feeling lazy

gpt-5.4 xhigh is a beast you only wanna unleash on your most complex tasks or spend 30 minutes watching the model reasoning how to do a git commit. For everything else i'd happily use a saner model like sonnet.

I use superpowers with both and have found the plan generation in codex to be a bit more thorough, so it's not the native planning mode necessarily

[dead]