AI Solves 2-Year-Old Math Conjecture in Minutes with Legible Proof

abeirami · x · 2026-08-01

A researcher shared a stunning breakthrough in AI reasoning. Two years ago, the author conjectured a tighter upper bound on the KL divergence of best-of-n with the reference model (Conjecture 4.4 in their ICML'25 paper).

After the author and a colleague pondered it for two weeks without success, they recently fed the problem to Fable 5 and GPT-5.6 Sol. Both models returned a legible and sound mathematical proof within minutes, demonstrating the immense potential of frontier models in advanced mathematical reasoning.

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