In my experience, Codex is better than Claude Code in every way and GPT-5.4 is on par or better than Opus 4.6 at every coding task I ask of it.

You're really not going to miss CC. And OpenAI actually had some foresight to invest massively in compute so they don't run into usage and rate limits like Anthropic does constantly. I couldn't even use CC for more than a couple complex tasks before I was out of extra usage or session usage. It was a maddening productivity killer and I just switched to Codex full time.