That is a good use-case as well and would definitely require a codex Pro subscription.

I've been doing something like this with the basic Gemini subscription using Antigravity. I end up hitting the Gemini 3 Pro High quota many times but then I can still use Claude Opus 4.5 on it!

I like Pro also for better access to 5.2 Pro which is indispensable for some problems and for producing specs/code samples. I use https://gitingest.com