I've yet to encounter a robust definition of intelligence which would rule in every human, while ruling out every form of existing AI (noting that we're talking about agents and "reasoning models", where the LLM itself is a component in a larger system). If you can offer such a definition, I'd be eager to hear it.

I personally prefer a practical, behaviorist definition: a feedback loop capable of prediction, modeling, and steering, towards arbitrary goal states. That makes it clear that we're merely talking about degrees of sophistication and capability, rather than a magical leap where mindless mechanism stops, and "real intelligence" begins.