I also highly recommend trying LMStudio. It’s a nice interface for downloading, using, and holding LLMs locally
I asked GPT 4, Claude 1 & 2, and Bard questions about a single documentation page and they all gave both incorrect and hallucinated answers. For example, I asked them to list all functions that accepted integers based on provided documentation. Their responses included functions that didn't accept integers and functions never mentioned in the documentation.