I asked ChatGPT a question about a made up character in a made up work and it came back with "I don’t actually have a reliable answer for that". Perfect.
On the other hand, I can ask it about varnishing a piece of wood and it will give a lovely table with options, tradeoffs, and Good/Ok/Bad ratings for each option, except the ratings can be a little off the mark. Same thing when asking what thickness cable is required to carry 15A in AU electrical work. Depending on the journey and line of questioning, you would either get 2.5mm^2 or 4mm^2.
Not wrong enough to kill someone, but wrong enough that you're forced to use it as a research tool rather than a trusted expert/guru.