Most of the time my pushbacks are true improvements, but I've seen a couple of instances where the LLM was happy to downgrade their own good solution.
I've used this a bunch as a suffix to try to prevent that, works OK in most cases, but not always obviously, works better in the system/developer prompt if you have access to those. Seems I've used that about ~1000 times since 2025/08 when I started using codex (- transcription duplications, so maybe 1/2 of that?).
$ rg -a -o "Answer grounded in truth" ~/.codex/sessions | wc -l
1046Although this was more of an issue when using opusplan as Sonnet loves to do this. I only use Opus now if using Claude.
Indeed, it's easy to surface this by sending one model a "Review" of their proposal to another, then bounce them back and forward, ask which one is best and both models will almost always say something like "The other proposal/review is better", I'm guessing because somehow they think it comes from the human, and "human is always right" or something.