[autop0ietic]

I would think GPT5 is great at high school level math but what high school level math problems are not in the training data?

I think the problem is that GPT5 is not "memorising" but conversely that doesn't automatically mean it is "reasoning". These are human attributes that we are trying to equate to machines and it just causes confusion.

[simianwords]

Make up one yourself and try it?