It's highly task specific.

I've been refactoring a ton of my Pandas code into Polars and using ChatGPT on the side as a documentation search and debugging tool.

It keeps hallucinating things about the docs, methods, and args for methods, even after changing my prompt to be explicit about doing it only with Polars.

I've noticed similar behavior with other libraries that aren't the major ones. I can't imagine how much it gets wrong with a less popular language.