Isn't it the opposite? From the link: Scores range from -100 to 100, where 0 means as many correct as incorrect answers, and negative scores mean more incorrect than correct.

Gemini 3 Flash scored +13 in the test, more correct answers than incorrect.

This model has the best score on that benchmark.

Edit: Huh... It does score highest in "Omniscience", but also very high in Hallucination Rate (where higher score is worse)...