+1 Open Codex is very nice. Yesterday I was using it with Gemini APIs and also using a local model using Ollama running on my laptop.

I added a very short chapter on setting this up (direct link to my book online): https://leanpub.com/ollama/read#using-the-open-codex-command...

This morning I tweaked my Open Codex config to also try gemma3:27b-it-qat - and Google’s olen source small is excellent: runs fast enough for a good dev experience, with very good functionality.