Beyond AIME
Seed2.1 Pro 87% leads since June 2026 Models answer 100 original competition-style math problems at or above the hardest AIME level. Each answer is a positive integer checked by exact match.
ByteDance rewrote each problem from existing contests to reduce contamination.
- Made by
- ByteDance Seed
- Released
- April 2025
- Kind
- Competition problems with answers
- Level
- Competition
- Scored
- Checked automatically
- Answers
- Short answer
- Tasks
- All public
- Strongest model tested
-
Mistral Medium 3.5 #114 on the capability index - Last in a launch post
- June 2026, dropped after it saturated
- Last model added
- June 2026
Seed2.1 Pro leads with 87% among models released by June 2026
Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.
The newest model with a score here came out in June 2026, and nobody has reported a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:
- Claude Fable 5.2
-
Gemini 4 Carbon - GPT-6 Astra
- Claude Opus 5.5
- and 16 more
- 1 Seed2.1 Pro 87%
- 2 Seed2.0 Pro 86.5%
- 3 Seed2.0 Lite (0428) 79%
- 4 Seed1.8 77%
- 5
LongCat-Flash-Thinking 69.5% - 6 Sarvam 105B 69.1%
- 7 Mistral Medium 3.5 66.9%
- 8 seed-oss-36b-instruct 65%
- 9
STEP3-VL-10B 63.2% - 10 Sarvam 30B 58.3%
- 11 Seed1.6-Thinking 56.3%
- 12 Seed-Thinking-v1.5 48%
- 13 LongCat-Flash-Omni 47.4%
- 14 LongCat-Flash-Chat 43%
Source: Labs’ model cards
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Seed2.1 Pro | 87% | Jun 2026 | Lab model card | |
| 2 | Seed2.0 Pro | 86.5% | Feb 2026 | Lab model card | |
| 3 | Seed2.0 Lite (0428) | 79% | Apr 2026 | Lab model card | |
| 4 | Seed1.8 | 77% | Dec 2025 | Lab model card | |
| 5 | LongCat-Flash-Thinking | 69.5% | Sep 2025 | Lab model card | |
| 6 | Sarvam 105B | 69.1% | Mar 2026 | Lab model card | |
| 7 | Mistral Medium 3.5 | 66.9% | May 2026 | Lab model card | |
| 8 | seed-oss-36b-instruct | 65% | Aug 2025 | Lab model card | |
| 9 | STEP3-VL-10B | 63.2% | Jan 2026 | Lab model card | |
| 10 | Sarvam 30B | 58.3% | Mar 2026 | Lab model card | |
| 11 | Seed1.6-Thinking | 56.3% | Jun 2025 | Lab model card | |
| 12 | Seed-Thinking-v1.5 | 48% | Apr 2025 | Lab model card | |
| 13 | LongCat-Flash-Omni | 47.4% | Oct 2025 | Lab model card | |
| 14 | LongCat-Flash-Chat | 43% | Aug 2025 | Lab model card |
7 models have held number one in labs’ own numbers since its release in April 2025
Lab claims count from the day the card came out, independent runs from the model’s release.
Source: Labs’ model cards
ByteDance Seed’s own number for Seed2.0 Pro passed 85% in February 2026
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Source: Labs’ model cards
Labs headline it less often now, last in June 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.
| Date | Launch post | Score | As the post writes it |
|---|---|---|---|
| Jun 23, 2026 | Seed2.1 Pro | 87 | BeyondAIME |
| May 22, 2026 | Mistral Medium 3.5 | 66.9 | Beyond AIME avg@16 |
| Apr 28, 2026 | Seed2.0 Lite (0428) | 79 | BeyondAIME |
| Mar 6, 2026 | Sarvam 30B | 58.3 | Beyond AIME |
| Mar 6, 2026 | Sarvam 105B | 69.1 | Beyond AIME |
| Feb 14, 2026 | Seed2.0 Pro | 86.5 | BeyondAIME |
| Dec 18, 2025 | Seed1.8 | 77 | BeyondAIME |
| Oct 31, 2025 | LongCat-Flash-Omni | 47.4 | BeyondAIME(avg@10) |
| Sep 21, 2025 | LongCat-Flash-Thinking | 69.5 | BeyondAIME(Mean@10) |
| Aug 29, 2025 | LongCat-Flash-Chat | 43 | BeyondAIME(avg@10) |
| Aug 20, 2025 | seed-oss-36b-instruct | 65 | BeyondAIME |
| Jun 25, 2025 | Seed1.6-Thinking | 56.3 | BeyondAIME |
| Apr 10, 2025 | Seed-Thinking-v1.5 | 48 | Beyond AIME |
8 system cards report it, from 3 labs
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.
| Date | Document | Score | As the document writes it | Section |
|---|---|---|---|---|
| Jun 23, 2026 | Seed2.1 Pro model card | 87 | BeyondAIME (Table 11) | Capabilities |
| Mar 21, 2026 | Seed1.8 model card | 77 | BeyondAIME (Table 1) | Capabilities |
| Feb 14, 2026 | Seed2.0 Pro model card | 86.5 | BeyondAIME (Table 3) | Capabilities |
| Jan 14, 2026 | STEP3-VL-10B technical report | 63.2 | BeyondAIME, SeRe (Tables 2 and 3). PaCoRe 74.00 | Capabilities |
| Oct 31, 2025 | LongCat-Flash-Omni technical report | 47.4 | BeyondAIME (avg@10) (Table 13) | Capabilities |
| Sep 23, 2025 | LongCat-Flash-Thinking technical report | 69.5 | BeyondAIME(Mean@10) (Table 2) | Capabilities |
| Sep 1, 2025 | LongCat-Flash-Chat technical report | 43 | BeyondAIME (avg@10) (Table 3) | Capabilities |
| Apr 10, 2025 | Seed-Thinking-v1.5 technical report | 48 | Beyond AIME, mean of 32 samples (Table 2) | Capabilities |
More in Math
- 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%
- IMO-AnswerBench In use 400 olympiad problems with short verifiable answers, robustified against memorization. Scored by answer match. GLM-5.2 91%
- 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%
- 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% - 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%
- MathArena Apex Shortlist In use Models solve 47 hard final-answer problems that MathArena selected from 2025 competitions, where the best models scored about 50% at selection. Scored by accuracy over repeated attempts. GPT-5.5 98.4%