> Humans create new, spontaneous thoughts.

The compatibility of determinism and freedom of will is still controversially debated. There is a good chance that Humans don’t „create“.

> There’s no deliberation behind AI, just statistical probabilities. There’s no new or spontaneous thoughts, at most pseudorandomness introduced by the author of the model interface.

You can say exactly the same about deterministic humans since it is often argued that the randomness of thermodynamic or quantum mechanical processes is irrelevant to the question of whether free will is possible. This is justified by the fact that our concept of freedom means a decision that is self-determined by reasons and not a sequence of events determined by chance.