Gary Marcus Calls Out Bubeck's Third Inflated GPT-5 Math Claim
GaryMarcus · x · 2026-09-08
KatieMiller documents the third time SebastienBubeck claimed math credit for OpenAI tasks it didn't complete: an August 2025 claim that GPT-5 Pro produced "new mathematics" improving a stepsize bound from 1/L to 1.5/L (humans had already solved it at a tighter 1.75/L), and an October 2025 claim that GPT-5 solved Erdős problems that were never open. Gary Marcus publicly challenges Bubeck to explain.
Related event: Gary Marcus Presses Bubeck Over Inflated GPT-5 Math Claims(2 posts)→
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