Now if the invention also includes some real world work, or if the AI took a huge amount of tokens/money to reach the conclusion, ok. But otherwise an AI coming up with the idea at low cost should invalidate a patent of that idea (the AI not being trained on the patent of course.)
I think if an AI solves a problem that has been known and unsolved for a substantial period of time dispute attempts then the solution could only be considered non obvious.
If we make AI that can do 6 of these things before breakfast then we should think of them as easy to obtain.
The distinction is that non-obious to a human was a property that denoted a degree of specialness. If AI could do those things with ease then they cease to be special.
It was that factor that led people to be awarded some form of monopoly over the creation. But if it is no longer particularly special, then it should be public domain.