There's a systematic marketing campaign from oai on reddit and HN - there's a huge uptick of "codex is better than claude code" comments and posts this last week which is perfectly timed with the claude code increased limits
To be fair, GPT 5.4 is mostly a better model than Opus 4.6 in terms of quality of work. The tradeoff is it's less autonomous and it takes longer to complete equivalent tasks.
Thing is, Codex 5.3 is a better and more consistent model than anything Anthropic have come out with. It can deal with larger codebases, has compaction that works, and has much less of a tendency to resort to sycophantic hallucination as it runs out of ideas. I also appreciate their approach to third party harnesses like opencode, which is obviously the complete opposite to Anthropic and their scramble to keep their crumbling garden walls upright.
Which makes it even more of a shame that Sam Altman is such a psychopathic jackass.
Go to /r/codex and see how pissed off people are by the new Codex Plus plan 5-hour limits (they're a sliver of what they were a week ago). Whatever OpenAI is doing to market on Reddit isn't working.