Terence Tao, one of the most gifted living mathematicians and a Fields medalist, has evaluated the mathematical abilities of the AI model GPT-o1. Tao described the AI's performance as comparable to that of a 'mediocre, but not completely incompetent, graduate student.' This assessment marks an improvement over previous models, which Tao found to be closer to 'actually incompetent' graduate students. Additionally, GPT-o1 scored 120 on an IQ test. Tao's review suggests that with one or two more iterations, GPT-o1 could become a serious research tool.