GPT-6 Astra solves final FrontierMath Tier 4 problem, completing the benchmark
Miles_Brundage · x · 2026-09-11
Epoch AI reports that every FrontierMath Tier 4 problem has now been solved by AI, with GPT-6 Astra cracking the last remaining problem. Mathematicians often noted AI found unintended shortcuts on Tier 4 tasks, but this final problem — created by Jay Pantone — was reportedly solved without any such shortcuts.
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