I agree with this and actually Claude Code agrees with it too. I've had Codex cli (gpt-5-codex high) and claude code 4.5 sonnet (and sometimes opus 4.1) do the same lengthier task with the same prompt in cloned folders about 10x now and then I ask them to review the work in the other folder and determine who did the best job.

100% of the time Codex has done a far better job according to both Codex and Claude Code when reviewing. Meeting all the requirements where Claude would leave things out, do them lazily or badly and lose track overall.

Codex high just feels much smarter and more capable than Claude currently and even though it's quite a bit slower, it's work that I don't have to go over again and again to get it to the standards I want.