If you ask something longer than 20 lines, there’s a very high probability that it won’t work on the 15th round of corrections.

Try Claude by Anthropic. I noticed Copilot and Google getting hung up much faster than Claude.

Also, I find that if you encourage a good architecture, like a formalized system of variables with Atomic / Mutexed access and getter/setter functions, that seems to give a project more legs than letting the AI work out fiddly access protection schemes one by one.