evals.report
BenchmarksLabsCompareRun guidesIn the wild
BenchmarksReasoning

FrontierMath Tier 4

FrontierMath Tier 4 is Epoch AI's expansion set of 50 exceptionally difficult, original research-level mathematics problems—crafted and vetted by expert mathematicians—that can take a specialist days to solve, measuring an AI model's advanced mathematical reasoning by exact-answer accuracy.

ReasoningaccuracyHigher is better
ScoresAboutRun this benchmark

What is FrontierMath Tier 4?

FrontierMath Tier 4 is Epoch AI's expansion set of 50 exceptionally difficult, original research-level mathematics problems—crafted and vetted by expert mathematicians—that can take a specialist days to solve, measuring an AI model's advanced mathematical reasoning by exact-answer accuracy. evals.report tracks reported FrontierMath Tier 4 scores with the model, source, status, date, and run caveats attached — official leaderboard scores, vendor-reported launches, and clearly labeled community runs.

Top reported FrontierMath Tier 4 score: GPT-5.5 Pro — 39.6% (accuracy).

ModelLabScore↓Source modelStatusDate
GPT-5.5 ProOpenAI39.6%—OfficialApr 23, 2026Details
GPT-5.4 ProOpenAI37.5%—OfficialMar 5, 2026Details
GPT-5.5OpenAI35.4%—OfficialApr 23, 2026Details
GPT-5.4OpenAI27.1%—OfficialMar 5, 2026Details
Claude Opus 4.7Anthropic22.9%—OfficialApr 16, 2026Details
Claude Opus 4.6Anthropic22.9%—OfficialFeb 5, 2026Details
GPT-5.2OpenAI18.8%—OfficialDec 11, 2025Details
Gemini 3 ProGoogle DeepMind18.8%—OfficialNov 18, 2025Details
Gemini 3.1 Pro PreviewGoogle DeepMind16.7%—OfficialFeb 19, 2026Details
Muse SparkMeta14.6%—OfficialApr 8, 2026Details
Gemini 3.5 FlashGoogle DeepMind14.6%—OfficialMay 19, 2026Details
Kimi K2.6OpenMoonshot AI14.6%—OfficialApr 20, 2026Details
GLM-5.1OpenZ.ai12.5%—OfficialApr 7, 2026Details
GPT-5.1OpenAI12.5%—OfficialNov 12, 2025Details
GPT-5OpenAI12.5%—OfficialAug 7, 2025Details
Qwen 3.6 PlusAlibaba / Qwen8.3%—OfficialApr 2, 2026Details
Claude Sonnet 4.6Anthropic8.3%—OfficialFeb 17, 2026Details
GPT-5 miniOpenAI6.3%—OfficialAug 7, 2025Details
o4-miniOpenAI6.3%—OfficialApr 16, 2025Details
Kimi K2.5OpenMoonshot AI4.2%—OfficialJan 27, 2026Details
Qwen 3.6 Max PreviewAlibaba / Qwen4.2%—OfficialApr 20, 2026Details
Gemini 2.5 FlashGoogle DeepMind4.2%—OfficialApr 17, 2025Details
Gemini 3 FlashGoogle DeepMind4.2%—OfficialDec 17, 2025Details
Claude Opus 4.5Anthropic4.2%—OfficialNov 24, 2025Details
Claude Sonnet 4.5Anthropic4.2%—OfficialSep 29, 2025Details
Claude Opus 4.1Anthropic4.2%—OfficialAug 5, 2025Details
Gemini 2.5 ProGoogle DeepMind4.2%—OfficialMar 25, 2025Details
Claude Opus 4Anthropic4.2%—OfficialMay 22, 2025Details
GLM-4.6OpenZ.ai2.1%—OfficialSep 30, 2025Details
GLM-5OpenZ.ai2.1%—OfficialFeb 11, 2026Details
DeepSeek V3.2OpenDeepSeek2.1%—OfficialDec 1, 2025Details
Qwen3.5-397B-A17BOpenAlibaba / Qwen2.1%—OfficialFeb 16, 2026Details
Claude Haiku 4.5Anthropic2.1%—OfficialOct 15, 2025Details
Grok 4xAI2.1%—OfficialJul 9, 2025Details
o3OpenAI2.1%—OfficialApr 16, 2025Details

Each row reports the model’s accuracy on FrontierMath Tier 4. Click a row for the full run context.