"Database" was not meant in a literal sense. Clearly a lot of knowledge from similar problems is encoded in the model, that is why you can use models as a kind of fuzzy encyclopedia.

It is like an open book exam for humans where they also can lookup similar problems.

The current top comment makes the same point, but in a more diplomatic and sophisticated manner.

I mean strong human contestants would also know a lot of similar problems, I'm not seeing how it's fundamentally different or not a meaningful achievement.