Science & medicine In focus
SI has solved all the hardest FrontierMath problems: the score rose from 5% to 98% in 14 months
SI has outgrown an exam that seemed almost impossible a year ago: now it will have to be measured on problems that no human has solved yet.
Sources 2
Epoch AI announced that Tier 4 of the FrontierMath benchmark — research-level problems from professional mathematicians — is "saturated": each of the 43 problems has been solved by an SI at least once. The last one, written by Jay Panton, was solved by GPT-6 Astra, and without the "unintended workarounds" that the authors noticed in other solutions. When the tier launched in July 2025, the best result was about 5%; now Astra has 97.6% and Claude Fable 5 has 90.2%. Epoch is switching to unsolved problems and formal proof verification.