Comment by simonw

Which is why you run it in a coding agent loop using something like Codex CLI - then it doesn't matter if it imagines a non-existent function because it will correct itself when it tries to run the code.

Can you expand on "cannot figure out basic solutions even when pointed to the original source code of libraries on GitHub"? I have it do that all the time and it works really well for me (at least with modern "reasoning" models like GPT-5 and Claude 4.)