Math

FrontierMath Tier 4 (v2)

Epoch AI's FrontierMath benchmark, Tier 4 (v2 problem set): exceptionally difficult, original research-level mathematics problems vetted by expert mathematicians. Tier 4 is not comparable to FrontierMath Tiers 1-3, and v2 problem sets are not comparable to v1 results.

How models are tested

Scores are published numbers from the sources below. They are only comparable when the evaluation version, tools, agent harness, and sampling setup match. Missing scores are omitted rather than treated as zero.

Category: Math
Metric: Percent
Direction: Higher is better
Coverage: 5 / 318Models in this catalog with a published score
Updated: 2026-09-29Catalog snapshot date
Source: epoch.ai/benchmarks/frontiermath-tier-4-v2

Scores

1
GPT-6 Astra
OpenAIclosed
97.6%
2
Claude Fable 5.1
Anthropicclosed
87.8%
3
Claude Fable 5
Anthropicclosed
87.8%
4
GPT-5.6 Sol
OpenAIclosed
83.0%
5
Claude Opus 5
Anthropicclosed
73.2%

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