FrontierMath Tier 4 v2
Models solve 43 unpublished research-level math problems and submit answers that code checks automatically. Scored by share correct.
Version 2 corrected 12 problems and removed 7 from the original Tier 4 set.
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 FrontierMath uses new, unpublished problems and automated verification to reliably evaluate models while minimizing risk of data contamination.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.
- Level
- Research frontier Researchers, on open problems or tasks that take days
- 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.
GPT-6.1 Sol leads with 100%
Best score per model in Epoch AI’s data. Where a model ran with several settings or harnesses, we keep its best.
- 100.0 GPT-6.1 Sol
- 97.6 GPT-6 Astra
- 95.0 Claude Opus 5.5
- 92.7 GPT-6.1 Terra
- 90.2 Claude Fable 5
- 90.0 GPT-6 Sol
- 87.8 Claude Fable 5.1
- 82.9 GPT-5.6 Sol
- 80.5 Claude Sonnet 5.5
- 78.0 GPT-5.5 Pro
- 78.0
Gemini 4 Argon
- 75.6
AI Co-Mathematician
- 73.2 Claude Opus 5
- 72.5 GPT-5.5
- 70.7 GPT-5.6 Terra
- 70.7
Muse Wonder
- 61.0 GPT-5.6 Luna
- 58.5 GPT-5.4 Pro
- 56.1 Claude Opus 4.8
- 56.1 GPT-6 Luna
- 49.0 GPT-5.4
- 46.3
Qwen 3.8 Max
- 46.3
Muse Spark 1.3
- 46.3 Claude Haiku 5.5
- 46.3
DeepSeek V4.1 Flash 1017
- 46.0 GPT-5.2 Pro
- 39.0 Kimi K3
- 36.6
Gemini 3.7 Flash
- 34.1
Qwen3.7-Max
- 34.1
Qwen3.8 Max (0902)
- 31.7 Claude Opus 4.7
- 31.7 Grok 4.6
- 31.7
Muse Spark Open
- 31.7 GPT-5.2
- 29.3 GLM-5.2
- 29.3 Claude Sonnet 5
- 29.3 GLM-5.3
- 26.8 Claude Opus 4.6
- 26.8
Gemini 3.1 Pro
- 26.8
Gemini 3.5 Flash
- 26.8
DeepSeek V4 Pro 0813
- 26.8
DeepSeek V4.1 Flash
- 26.8
Mistral Large 4
- 25.6 Kimi K2.6
- 24.4 Grok 4.5
- 24.4
DeepSeek V4 Flash 0731
- 21.9 GPT-5
- 21.9
Gemini 3.6 Flash
- 21.9
Gemini 3.8 Flash
- 19.5 GPT-5 Pro
- 17.1
Gemini 3 Flash
- 17.1 Grok 4.20
- 17.1
Inkling-Small
- 17.1 GLM-5.3-Flash
- 17.1 Grok 4.7
- 14.6 Grok 4.3 Beta
- 12.2 GPT-5 mini
- 12.2 GPT-5.4 Nano
- 12.2 Kimi K2.7 Code
- 9.76 GPT-5.4 Mini
- 4.88 o4-mini
- 4.88 Claude Opus 4.5
- 4.88
Inkling
- 2.44 Claude Opus 4.1
- 2.44 GPT-5 nano
- 2.44 Claude Sonnet 4.5
- 2.44
DeepSeek-V4-Pro
- 2.44 GPT-5.5 Instant
- 0.0 o3-mini
- 0.0
Gemini 2.5 Pro
- 0.0
Gemini 3.5 Flash-Lite
- 1 GPT-6.1 Sol max 100%
- 2 GPT-6 Astra high 97.6%
- 3 Claude Opus 5.5 max 95%
- 4 GPT-6.1 Terra max 92.7%
- 5 Claude Fable 5 max 90.2%
- 6 GPT-6 Sol max 90%
- 7 Claude Fable 5.1 max 87.8%
- 8 GPT-5.6 Sol max 82.9%
- 9 Claude Sonnet 5.5 max 80.5%
- 10 GPT-5.5 Pro xhigh 78%
- 11
Gemini 4 Argon high 78%
- 12
AI Co-Mathematician 75.6%
- 13 Claude Opus 5 max 73.2%
- 14 GPT-5.5 xhigh 72.5%
- 15 GPT-5.6 Terra max 70.7%
- 16
Muse Wonder max 70.7%
- 17 GPT-5.6 Luna max 61%
- 18 GPT-5.4 Pro xhigh 58.5%
- 19 Claude Opus 4.8 max 56.1%
- 20 GPT-6 Luna max 56.1%
- 21 GPT-5.4 xhigh 49%
- 22
Qwen 3.8 Max xhigh 46.3%
- 23
Muse Spark 1.3 max 46.3%
- 24 Claude Haiku 5.5 max 46.3%
- 25
DeepSeek V4.1 Flash 1017 max 46.3%
- 26 GPT-5.2 Pro xhigh 46%
- 27 Kimi K3 max 39%
- 28
Gemini 3.7 Flash high 36.6%
- 29
Qwen3.7-Max 34.1%
- 30
Qwen3.8 Max (0902) xhigh 34.1%
- 31 Claude Opus 4.7 max 31.7%
- 32 Grok 4.6 xhigh 31.7%
- 33
Muse Spark Open xhigh 31.7%
- 34 GPT-5.2 xhigh 31.7%
- 35 GLM-5.2 max 29.3%
- 36 Claude Sonnet 5 max 29.3%
- 37 GLM-5.3 max 29.3%
- 38 Claude Opus 4.6 max 26.8%
- 39
Gemini 3.1 Pro 26.8%
- 40
Gemini 3.5 Flash high 26.8%
- 41
DeepSeek V4 Pro 0813 max 26.8%
- 42
DeepSeek V4.1 Flash max 26.8%
- 43
Mistral Large 4 high 26.8%
- 44 Kimi K2.6 25.6%
- 45 Grok 4.5 high 24.4%
- 46
DeepSeek V4 Flash 0731 max 24.4%
- 47 GPT-5 high 21.9%
- 48
Gemini 3.6 Flash high 21.9%
- 49
Gemini 3.8 Flash high 21.9%
- 50 GPT-5 Pro high 19.5%
- 51
Gemini 3 Flash 17.1%
- 52 Grok 4.20 17.1%
- 53
Inkling-Small xhigh 17.1%
- 54 GLM-5.3-Flash max 17.1%
- 55 Grok 4.7 xhigh 17.1%
- 56 Grok 4.3 Beta high 14.6%
- 57 GPT-5 mini high 12.2%
- 58 GPT-5.4 Nano high 12.2%
- 59 Kimi K2.7 Code 12.2%
- 60 GPT-5.4 Mini xhigh 9.76%
- 61 o4-mini high 4.88%
- 62 Claude Opus 4.5 32k thinking 4.88%
- 63
Inkling xhigh 4.88%
- 64 Claude Opus 4.1 32K 2.44%
- 65 GPT-5 nano high 2.44%
- 66 Claude Sonnet 4.5 32k thinking 2.44%
- 67
DeepSeek-V4-Pro max 2.44%
- 68 GPT-5.5 Instant 2.44%
- 69 o3-mini high 0%
- 70
Gemini 2.5 Pro Jun 2025 0%
- 71
Gemini 3.5 Flash-Lite high 0%
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | GPT-6.1 Sol | 100% | max | Sep 2026 | Epoch AI |
| 2 | GPT-6 Astra | 97.6% | high | Sep 2026 | Epoch AI |
| 3 | Claude Opus 5.5 | 95% | max | Sep 2026 | Epoch AI |
| 4 | GPT-6.1 Terra | 92.7% | max | Oct 2026 | Epoch AI |
| 5 | Claude Fable 5 | 90.2% | max | Jun 2026 | Epoch AI |
| 6 | GPT-6 Sol | 90% | max | Sep 2026 | Epoch AI |
| 7 | Claude Fable 5.1 | 87.8% | max | Sep 2026 | Epoch AI |
| 8 | GPT-5.6 Sol | 82.9% | max | Jul 2026 | Epoch AI |
| 9 | Claude Sonnet 5.5 | 80.5% | max | Sep 2026 | Epoch AI |
| 10 | GPT-5.5 Pro | 78% | xhigh | Apr 2026 | Epoch AI |
| 11 | | 78% | high | Sep 2026 | Epoch AI |
| 12 | | 75.6% | May 2026 | Epoch AI | |
| 13 | Claude Opus 5 | 73.2% | max | Jul 2026 | Epoch AI |
| 14 | GPT-5.5 | 72.5% | xhigh | Apr 2026 | Epoch AI |
| 15 | GPT-5.6 Terra | 70.7% | max | Jul 2026 | Epoch AI |
| 16 | | 70.7% | max | Oct 2026 | Epoch AI |
| 17 | GPT-5.6 Luna | 61% | max | Jul 2026 | Epoch AI |
| 18 | GPT-5.4 Pro | 58.5% | xhigh | Mar 2026 | Epoch AI |
| 19 | Claude Opus 4.8 | 56.1% | max | May 2026 | Epoch AI |
| 20 | GPT-6 Luna | 56.1% | max | Sep 2026 | Epoch AI |
| 21 | GPT-5.4 | 49% | xhigh | Mar 2026 | Epoch AI |
| 22 | | 46.3% | xhigh | Aug 2026 | Epoch AI |
| 23 | | 46.3% | max | Sep 2026 | Epoch AI |
| 24 | Claude Haiku 5.5 | 46.3% | max | Oct 2026 | Epoch AI |
| 25 | | 46.3% | max | Oct 2026 | Epoch AI |
| 26 | GPT-5.2 Pro | 46% | xhigh | Dec 2025 | Epoch AI |
| 27 | Kimi K3 | 39% | max | Jul 2026 | Epoch AI |
| 28 | | 36.6% | high | Aug 2026 | Epoch AI |
| 29 | | 34.1% | May 2026 | Epoch AI | |
| 30 | | 34.1% | xhigh | Sep 2026 | Epoch AI |
| 31 | Claude Opus 4.7 | 31.7% | max | Apr 2026 | Epoch AI |
| 32 | Grok 4.6 | 31.7% | xhigh | Aug 2026 | Epoch AI |
| 33 | | 31.7% | xhigh | Oct 2026 | Epoch AI |
| 34 | GPT-5.2 | 31.7% | xhigh | Dec 2025 | Epoch AI |
| 35 | GLM-5.2 | 29.3% | max | Jun 2026 | Epoch AI |
| 36 | Claude Sonnet 5 | 29.3% | max | Jun 2026 | Epoch AI |
| 37 | GLM-5.3 | 29.3% | max | Aug 2026 | Epoch AI |
| 38 | Claude Opus 4.6 | 26.8% | max | Feb 2026 | Epoch AI |
| 39 | | 26.8% | Feb 2026 | Epoch AI | |
| 40 | | 26.8% | high | May 2026 | Epoch AI |
| 41 | | 26.8% | max | Aug 2026 | Epoch AI |
| 42 | | 26.8% | max | Sep 2026 | Epoch AI |
| 43 | | 26.8% | high | Oct 2026 | Epoch AI |
| 44 | Kimi K2.6 | 25.6% | Apr 2026 | Epoch AI | |
| 45 | Grok 4.5 | 24.4% | high | Jul 2026 | Epoch AI |
| 46 | | 24.4% | max | Jul 2026 | Epoch AI |
| 47 | GPT-5 | 21.9% | high | Aug 2025 | Epoch AI |
| 48 | | 21.9% | high | Jul 2026 | Epoch AI |
| 49 | | 21.9% | high | Sep 2026 | Epoch AI |
| 50 | GPT-5 Pro | 19.5% | high | Oct 2025 | Epoch AI |
| 51 | | 17.1% | Dec 2025 | Epoch AI | |
| 52 | Grok 4.20 | 17.1% | Feb 2026 | Epoch AI | |
| 53 | | 17.1% | xhigh | Jul 2026 | Epoch AI |
| 54 | GLM-5.3-Flash | 17.1% | max | Aug 2026 | Epoch AI |
| 55 | Grok 4.7 | 17.1% | xhigh | Sep 2026 | Epoch AI |
| 56 | Grok 4.3 Beta | 14.6% | high | Apr 2026 | Epoch AI |
| 57 | GPT-5 mini | 12.2% | high | Aug 2025 | Epoch AI |
| 58 | GPT-5.4 Nano | 12.2% | high | Mar 2026 | Epoch AI |
| 59 | Kimi K2.7 Code | 12.2% | Jun 2026 | Epoch AI | |
| 60 | GPT-5.4 Mini | 9.76% | xhigh | Mar 2026 | Epoch AI |
| 61 | o4-mini | 4.88% | high | Apr 2025 | Epoch AI |
| 62 | Claude Opus 4.5 | 4.88% | 32k thinking | Nov 2025 | Epoch AI |
| 63 | | 4.88% | xhigh | Jul 2026 | Epoch AI |
| 64 | Claude Opus 4.1 | 2.44% | 32K | Aug 2025 | Epoch AI |
| 65 | GPT-5 nano | 2.44% | high | Aug 2025 | Epoch AI |
| 66 | Claude Sonnet 4.5 | 2.44% | 32k thinking | Sep 2025 | Epoch AI |
| 67 | | 2.44% | max | Apr 2026 | Epoch AI |
| 68 | GPT-5.5 Instant | 2.44% | May 2026 | Epoch AI | |
| 69 | o3-mini | 0% | high | Jan 2025 | Epoch AI |
| 70 | | 0% | Jun 2025 | Epoch AI | |
| 71 | | 0% | high | Jul 2026 | Epoch AI |
Labs report scores for 2 models in their cards. We plot every source in the charts below.
4 models have held number one since its release in Jun 2026
Lab claims count from the day the card came out, independent runs from the model’s release.
The best score passed 85% in Jun 2026
All the scores we have, one dot each, so a model tested at several settings appears more than once.
One lab put it in a launch post in the last six months
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.
| Date | Launch post | Score | As the post writes it |
|---|---|---|---|
| 9 Jul 2026 | GPT-5.6 Luna | 58.5 | FrontierMath Tier 4 (v2) |
| 9 Jul 2026 | GPT-5.6 Terra | 68.3 | FrontierMath Tier 4 (v2) |
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.
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