GPT-5.6 Breaks Record on Math Problem
jasondeanlee · x · 2026-07-13
Sebastien Bubeck shared a math problem he uses to track reasoning progress in models: how long a gradient flow path can be under the unit Euclidean ball constraint.
The shared post notes that the previous human record was 2.29, but @jasondeanlee pushed it to 2.28 using a "double-loop cover" prompt. Afterward, GPT-5.6 pondered for 8 hours, reducing the result to 2.26 and reportedly even writing a paper on it. Ultimately, the post showcases how model reasoning capabilities continue to advance on a single, fixed problem.
Related event: GPT-5.6 Rumored to Achieve New Breakthroughs in Math Reasoning(4 posts)→
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