Benchmark Almanac

FrontierMath

GPT-5.5 Pro 52.4% leads since Apr 2026 Fading

Unpublished research-level math problems with automatically verifiable answers. Tier 4 is the hardest tier.

Problems held privately by Epoch AI.

In the authors’ words

We introduce FrontierMath, a benchmark of hundreds of original, exceptionally challenging mathematics problems crafted and vetted by expert mathematicians. The questions cover most major branches of modern mathematics – from computationally intensive problems in number theory and real analysis to abstract questions in algebraic geometry and category theory. Solving a typical problem requires multiple hours of effort from a researcher in the relevant branch of mathematics, and for the upper end questions, multiple days. FrontierMath uses new, unpublished problems and automated verification to reliably evaluate models while minimizing risk of data contamination. Current state-of-the-art AI models solve under 2% of problems, revealing a vast gap between AI capabilities and the prowess of the mathematical community. As AI systems advance toward expert-level mathematical abilities, FrontierMath offers a rigorous testbed that quantifies their progress.

Abstract of FrontierMath: A Benchmark for Evaluating Advanced Mathematical Reasoning in AI (arXiv:2411.04872, CC0)
Made by Epoch AI Released Nov 2024 Research mathematics Tasks kept private Last in a launch post Jun 2026 , dropped for a newer version Last model added Jun 2026 Scores refreshed 31 Oct 2026
Level
Expert Specialists with years of training, often over hours of work
Scored
Checked automatically A program checks the result against an answer key, unit tests or the expected final state.
Answers
Short answer A number, word or short string matched to a key.
70
Models scored in Epoch AI data
11
Launch posts list it, from 2 labs
1
System card reports it, from 1 lab

GPT-5.5 Pro leads with 52.4% among models released by May 2026

Best score per model in Epoch AI’s data. Where a model ran with several settings or harnesses, we keep its best.

The newest model with a score here came out in May 2026, and nobody has tested a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:

  1. 1 GPT-5.5 Pro high 52.4%
  2. 2 GPT-5.5 xhigh 51.7%
  3. 3 GPT-5.4 Pro xhigh 50%
  4. 4 GPT-5.4 xhigh 47.6%
  5. 5 Claude Opus 4.8 max 47.2%
  6. 6 Claude Opus 4.7 xhigh 43.8%
  7. 7 GPT-5.2 xhigh 40.7%
  8. 8 Claude Opus 4.6 max 40.7%
  9. 9 Muse Spark 39%
  10. 10 Kimi K2.6 39%
  11. 11 Gemini 3.5 Flash high 39%
  12. 12 Gemini 3 Pro 37.6%
  13. 13 Gemini 3.1 Pro 36.9%
  14. 14 Gemini 3 Flash 35.6%
  15. 15 GLM-5.1 33.5%
  16. 16 GPT-5 high 32.4%
  17. 17 Claude Sonnet 4.6 16k thinking 32.4%
  18. 18 GPT-5.1 high 31%
  19. 19 Gemini 2.5 Deep Think 29%
  20. 20 GPT-5.4 Mini high 28.3%
  21. 21 Kimi K2.5 Fireworks 27.9%
  22. 22 GPT-5 mini high 27.2%
  23. 23 Qwen 3.6 Plus 2026-04-02 26.2%
  24. 24 GPT-5.4 Nano high 25.9%
  25. 25 o4-mini high 24.8%
  26. 26 Qwen 3.6 Max (Preview) 23.1%
  27. 27 DeepSeek-V3.2 Thinking; Fireworks 22.1%
  28. 28 Kimi K2 Thinking Together 21.4%
  29. 29 Qwen 3.5 Plus (hosted 397B-A17B) 21%
  30. 30 Claude Opus 4.5 no thinking 20.7%
  31. 31 Grok 4 19.7%
  32. 32 o3 high 18.7%
  33. 33 GLM-5 16.4%
  34. 34 Claude Sonnet 4.5 32k thinking 15.2%
  35. 35 Gemini 2.5 Pro Jun 2025 14.1%
  36. 36 o3-mini high 12.4%
  37. 37 Qwen 3.6 Flash 2026-04-16 10.3%
  38. 38 o1 high 9.31%
  39. 39 Qwen3-235B-A22B-Thinking Jul 2025 8.48%
  40. 40 GPT-5 nano high 8.28%
  41. 41 Claude Opus 4.1 27K 7.24%
  42. 42 Qwen 3.5 Flash (hosted 35B-A3B) 6.21%
  43. 43 Claude Haiku 4.5 32K 5.90%
  44. 44 Grok-3 mini high 5.86%
  45. 45 GPT-4.1 5.52%
  46. 46 Gemini 2.5 Flash Jun 2025 4.84%
  47. 47 GPT-4.1 mini 4.48%
  48. 48 Claude Opus 4 4.48%
  49. 49 Claude 3.7 Sonnet 16k thinking 4.14%
  50. 50 Claude Sonnet 4 4.14%
  51. 51 GLM-4.6 Together 3.82%
  52. 52 Grok 3 3.79%
  53. 53 GLM-4.7 Together 2.44%
  54. 54 Claude 3.5 Sonnet (October 2024) 2.07%
  55. 55 o1-mini medium 1.72%
  56. 56 DeepSeek-V3 1.72%
  57. 57 Gemini 2.0 Flash Feb 2025 1.72%
  58. 58 Qwen Plus Apr 2025 1.72%
  59. 59 Claude 3.5 Sonnet Jun 2024 1.03%
  60. 60 Qwen2.5-Max 1.03%
  61. 61 GPT-4.1 nano 1.03%
  62. 62 Grok-2 Dec 2024 0.69%
  63. 63 Llama 4 Maverick FP8 0.69%
  64. 64 Mistral Medium 3 0.35%
  65. 65 GPT-4o Aug 2024 0.34%
  66. 66 Claude 3.5 Haiku Oct 2024 0.34%
  67. 67 Mistral Large 2 Nov 2024 0.34%
  68. 68 GPT-4o Nov 2024 0.34%
  69. 69 Gemini 1.5 Flash Sep 2024 0%
  70. 70 Llama 4 Scout 0%
#ModelScoreSettingDateSource
1 GPT-5.5 Pro 52.4% high Apr 2026 Epoch AI
2 GPT-5.5 51.7% xhigh Apr 2026 Epoch AI
3 GPT-5.4 Pro 50% xhigh Mar 2026 Epoch AI
4 GPT-5.4 47.6% xhigh Mar 2026 Epoch AI
5 Claude Opus 4.8 47.2% max May 2026 Epoch AI
6 Claude Opus 4.7 43.8% xhigh Apr 2026 Epoch AI
7 GPT-5.2 40.7% xhigh Dec 2025 Epoch AI
8 Claude Opus 4.6 40.7% max Feb 2026 Epoch AI
9 Muse Spark 39% Apr 2026 Epoch AI
10 Kimi K2.6 39% Apr 2026 Epoch AI
11 Gemini 3.5 Flash 39% high May 2026 Epoch AI
12 Gemini 3 Pro 37.6% Nov 2025 Epoch AI
13 Gemini 3.1 Pro 36.9% Feb 2026 Epoch AI
14 Gemini 3 Flash 35.6% Dec 2025 Epoch AI
15 GLM-5.1 33.5% Apr 2026 Epoch AI
16 GPT-5 32.4% high Aug 2025 Epoch AI
17 Claude Sonnet 4.6 32.4% 16k thinking Feb 2026 Epoch AI
18 GPT-5.1 31% high Nov 2025 Epoch AI
19 Gemini 2.5 Deep Think 29% Aug 2025 Epoch AI
20 GPT-5.4 Mini 28.3% high Mar 2026 Epoch AI
21 Kimi K2.5 27.9% Fireworks Jan 2026 Epoch AI
22 GPT-5 mini 27.2% high Aug 2025 Epoch AI
23 Qwen 3.6 Plus 26.2% 2026-04-02 Mar 2026 Epoch AI
24 GPT-5.4 Nano 25.9% high Mar 2026 Epoch AI
25 o4-mini 24.8% high Apr 2025 Epoch AI
26 Qwen 3.6 Max (Preview) 23.1% Apr 2026 Epoch AI
27 DeepSeek-V3.2 22.1% Thinking; Fireworks Dec 2025 Epoch AI
28 Kimi K2 Thinking 21.4% Together Nov 2025 Epoch AI
29 Qwen 3.5 Plus (hosted 397B-A17B) 21% Feb 2026 Epoch AI
30 Claude Opus 4.5 20.7% no thinking Nov 2025 Epoch AI
31 Grok 4 19.7% Jul 2025 Epoch AI
32 o3 18.7% high Apr 2025 Epoch AI
33 GLM-5 16.4% Feb 2026 Epoch AI
34 Claude Sonnet 4.5 15.2% 32k thinking Sep 2025 Epoch AI
35 Gemini 2.5 Pro Jun 2025 14.1% Jun 2025 Epoch AI
36 o3-mini 12.4% high Jan 2025 Epoch AI
37 Qwen 3.6 Flash 10.3% 2026-04-16 Apr 2026 Epoch AI
38 o1 9.31% high Dec 2024 Epoch AI
39 Qwen3-235B-A22B-Thinking Jul 2025 8.48% Jul 2025 Epoch AI
40 GPT-5 nano 8.28% high Aug 2025 Epoch AI
41 Claude Opus 4.1 7.24% 27K Aug 2025 Epoch AI
42 Qwen 3.5 Flash (hosted 35B-A3B) 6.21% Feb 2026 Epoch AI
43 Claude Haiku 4.5 5.90% 32K Oct 2025 Epoch AI
44 Grok-3 mini 5.86% high Apr 2025 Epoch AI
45 GPT-4.1 5.52% Apr 2025 Epoch AI
46 Gemini 2.5 Flash Jun 2025 4.84% Jun 2025 Epoch AI
47 GPT-4.1 mini 4.48% Apr 2025 Epoch AI
48 Claude Opus 4 4.48% May 2025 Epoch AI
49 Claude 3.7 Sonnet 4.14% 16k thinking Feb 2025 Epoch AI
50 Claude Sonnet 4 4.14% May 2025 Epoch AI
51 GLM-4.6 3.82% Together Sep 2025 Epoch AI
52 Grok 3 3.79% Apr 2025 Epoch AI
53 GLM-4.7 2.44% Together Dec 2025 Epoch AI
54 Claude 3.5 Sonnet (October 2024) 2.07% Oct 2024 Epoch AI
55 o1-mini 1.72% medium Sep 2024 Epoch AI
56 DeepSeek-V3 1.72% Dec 2024 Epoch AI
57 Gemini 2.0 Flash Feb 2025 1.72% Feb 2025 Epoch AI
58 Qwen Plus Apr 2025 1.72% Apr 2025 Epoch AI
59 Claude 3.5 Sonnet 1.03% Jun 2024 Jun 2024 Epoch AI
60 Qwen2.5-Max 1.03% Jan 2025 Epoch AI
61 GPT-4.1 nano 1.03% Apr 2025 Epoch AI
62 Grok-2 Dec 2024 0.69% Dec 2024 Epoch AI
63 Llama 4 Maverick 0.69% FP8 Apr 2025 Epoch AI
64 Mistral Medium 3 0.35% May 2025 Epoch AI
65 GPT-4o Aug 2024 0.34% Aug 2024 Epoch AI
66 Claude 3.5 Haiku 0.34% Oct 2024 Oct 2024 Epoch AI
67 Mistral Large 2 Nov 2024 0.34% Nov 2024 Epoch AI
68 GPT-4o Nov 2024 0.34% Nov 2024 Epoch AI
69 Gemini 1.5 Flash Sep 2024 0% Sep 2024 Epoch AI
70 Llama 4 Scout 0% Apr 2025 Epoch AI

Labs report scores for 11 models in their cards. We plot every source in the charts below.

10 models have held number one since its release in Nov 2024

Lab claims count from the day the card came out, independent runs from the model’s release. We draw one row each for Epoch AI’s runs and what labs claim in their cards.

Anthropic OpenAI Google DeepMind
Epoch AI runs Replaced by Tiers 1-3 v2, Jun 2026
GPT-5.5 Pro 52.4%
Lab claims Replaced by Tiers 1-3 v2, Jun 2026
GPT-5.5 52.4%

Scores over time

All the scores we have, one dot each, so a model tested at several settings appears more than once.

Run or collected by Epoch AI Reported by the lab in its model card Best so far
0% 20% 40% 60% 80% 100% 2024 2025 2026 Near the ceiling (85%) Highest possible score GPT-5.5 Pro GPT-5.2 GPT-5 ChatGPT agent o3-mini Claude 3.5 Sonnet (October 2024) 0% 20% 40% 60% 80% 100% 2024 2025 2026 Near the ceiling (85%) Highest possible score GPT-5.5 Pro GPT-5.2

Labs headline it less often now, last in Jun 2026

Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.

OpenAI
Microsoft
DateLaunch postScoreAs the post writes it
2 Jun 2026 MAI-Code-1-Flash 6.3 Frontier Math (Tier 1-3)
23 Apr 2026 GPT-5.5 Pro 52.4 FrontierMath Tier 1-3
23 Apr 2026 GPT-5.5 52.4 FrontierMath Tier 1–3 (GPT-5.5 Pro)
5 Mar 2026 GPT-5.4 Pro 50 FrontierMath Tier 1-3
11 Dec 2025 GPT-5.2 40.3 FrontierMath (Tier 1–3) Advanced mathematics
13 Nov 2025 GPT-5.1 26.7 FrontierMath (with Python tool)
7 Aug 2025 GPT-5 nano 9.6 FrontierMath (with python tool only)
7 Aug 2025 GPT-5 mini 22.1 FrontierMath (with python tool only)
7 Aug 2025 GPT-5 32.1 FrontierMath, Tier 1-3, GPT-5 pro (python)
17 Jul 2025 ChatGPT agent 27.4 FrontierMath Tier 1-3, with tools (text)
31 Jan 2025 o3-mini 9.2 FrontierMath Pass@1

One system card reports it

Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.

DateDocumentScoreAs the document writes itSection
2 Jun 2026 MAI-Code-1-Flash model card 6.3 Frontier Math Tier 1-3, Acc, version not stated (Core reasoning table) Capabilities

Versions

We switch the top row to each new version when it comes out. Open it for one row per version. An old version stays in play while people still test it, so whoever first takes it past 85% gets credit for closing it out.

Anthropic OpenAI Google DeepMind
FrontierMath Tiers 1-3 v2 Passed 85% in Jun 2026, by GPT-5.5 Pro
GPT-6 Astra 93.7%
FrontierMath Replaced by Tiers 1-3 v2, Jun 2026
GPT-5.5 Pro 52.4%
FrontierMath Tiers 1-3 v2 Passed 85% in Jun 2026, by GPT-5.5 Pro
GPT-6 Astra 93.7%

More in Math

All 105 in Math
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  • AIME 2026 In use Models solve the 30 integer-answer problems from the 2026 AIME I and II math competitions. Scored by exact answer match. GPT-5.5 100%
  • HMMT 2026 In use Models solve the 33 final-answer problems from the February 2026 Harvard-MIT Mathematics Tournament. Scored by exact answer match. GPT-5.5 98.5%
  • MathArena (Apex, IMO, USAMO) In use Evaluates models on newly released math competitions after release. Final-answer or human/LLM-judged proof scores. Claude Opus 4.8 81.3%
  • PolyMath In use Models solve 9,000 parallel math problems in 18 languages across four difficulty levels, from school math to frontier math. Final answers are checked. Qwen3.7-Max 86.5%
  • USAMO 2026 In use Models write full proofs for the six problems of the 2026 USA Mathematical Olympiad. Judges grade each proof from 0 to 7 against rubrics. GPT-5.5 98.2%