AI BriefingExperience Using ChatGPT 5.5 Pro (28-minute session)
Key point
ChatGPT 5.5 Pro's mathematical capability has improved to the point of performing PhD-level mathematical research without human intervention.
Details
Evaluations of LLMs' mathematical capabilities continue to be revised upward. Recent testing of ChatGPT 5.5 Pro showed remarkable performance, carrying out PhD-level research in about an hour without substantial human mathematical intervention.
In the past, LLMs were criticized for merely finding answers from existing literature or simply deriving already-known results. But recent LLMs have reached a stage where they can find arguments that human mathematicians have not yet discovered, or solve problems by skillfully combining existing knowledge.
As a result, the bar for mathematical research is rising. Simply posing a problem is no longer enough; it has become important to present problems difficult enough that the LLM cannot solve them.
The author sought to verify ChatGPT 5.5 Pro's actual performance using problems related to Additive Number Theory covered in a paper by Mel Nathanson.
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