First experience is not great. Here are the issues to start using codex:
1. Default model used doesn't work and you get error: system OpenAI rejected the request (request ID: req_06727eaf1c5d1e3f900760d10ca565a7). Please verify your settings and try again.
2. You have to switch to model o4-mini-2025-04-16 or some other model using /model. Now if you exit codex, you are back to default model and again have to switch everytime.
3. Crashed the first time with NodeJS error.
But after initial hickups seems to work and still checking how good/bad it is compared to claude code (which I love except for context size limits)