My recent experience regarding questions on documentation:

• dovecot: shitty useless responses, totally made up
• Gentoo linux: to be checked twice and mostly wrong or fake
• godot: accurate and correct almost always, maybe examples not always 100% correct
• C++ standard 17: correct, never had a wrong reply from llm, also the exact ples where on point and correct

I think that’s all what I have used it for in the last six months.

Note: I used only Google search AI llm, nothing else.

So it seems that depends on what you ask.