Epoch AI releases a revised FrontierMath
Released a revised FrontierMath — in Tier 4, 12 problems revised and 7 removed (in Tiers 1–3, 123 problems revised and 5 removed)
Why it matters
Large-scale errors were found even in a top-difficulty benchmark, raising doubts about the reliability of its review once again
Source — Primary sources first; secondary reports are labelled “Press”
Officialepoch.aihttps://epoch.ai/benchmarks/frontiermath-tier-4-v2Added in Week 35, 2026 · See that week