You do realize that AI is just a marketing term, right? None of these models learn, have intelligence or create truly original work. As a matter of fact, if people don't continue to create original content, these models would stagnate or enter a feedback loop that would poison themselves with their own erroneous responses.
AIs don't think. They copy with extra steps.
Except that the information it gives you is often objectively incorrect and it makes up sources (this happened to me a lot of times). And no, it can't do what a human can. It doesn't interpret the information it gets and it can't reach new conclusions based on what it "knows".
I honestly don't know how you can even begin to compare an LLM to the human brain.