←Back to NewsAI News/ReasoningnewsReasoningBenchmarksOpenAI's GPT-6 Astra Cracks Epoch's Hardest Math Benchmark in 14 MonthsA math benchmark built to resist AI just fell. GPT-6 Astra cracked the final Tier 4 problem, closing out a 98 percent run in 14 months.SourceEpoch AIPublishedSep 10, 2026, 5:38 PMAuthorAlphaSignal NewsroomRead1 min readA math benchmark built to resist AI just fell. GPT-6 Astra cracked the final Tier 4 problem, closing out a 98 percent run in 14 months.Reporting is indexed from AlphaSignal. Rights remain with the original publisher and cited sources.Read original report ↗Next readsEpoch AI · newsGPT-6 Astra Cracks a Decade-Old Voting Theory Problem Nobody Could SolveVals AI · newsVals AI's MysteryMechanism Benchmark Tests If AI Can Rediscover 222 Scientific LawsTogether AI · newsTogether AI Says Open-Source Kimi K3 Beats Claude Fable 5.1 on Legal Tasks
