When Epoch launched FM Tier 4 on July 11th, 2025, the top score

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When Epoch launched FM Tier 4 on July 11th, 2025, the top score was 5%. GPT-6 Astra has now solved the last problem standing. FrontierMath Tier 4 is saturated. https://x.com/AndrewCurran_/status/20981…

Epoch AI@EpochAIResearch5h ago

Every FrontierMath Tier 4 problem has now been solved by AI, with GPT-6 Astra solving the last problem standing. Mathematicians often commented that AI found unintended shortcuts when solving their Tier 4 problems. Not so for this last one, which was created by Jay Pantone.