Not only that, but the notion that GPT-5 will answer those questions with only 2% accuracy seems suspect. Those are exactly the kinds of questions that current models are great at.

Nothing about that page makes much sense.

The percentages are added, not averaged. Each category sums to 10%, and the General Knowledge category has 5 equally-weighted subcategories, so 2% is the best possible score you can get in the social science subcategory.

I don't know why they decided to do it this way. It's very confusing.