CMO 2025
Seed2.0 Pro 114.0 leads since February 2026 Models write full proofs for the six problems of the 2025 China Mathematical Olympiad. Graders score proofs out of 126 points.
A one-time competition exam, not a maintained benchmark. DeepSeek graded the English version.
- Made by
- Chinese Mathematical Society
- Released
- November 2025
- Kind
- Written proofs
- Level
- Competition
- Scored
- Graded by people
- Answers
- Written proof
- Tasks
- All public
- Last in a launch post
- February 2026, dropped before it saturated
- Last model added
- February 2026
Seed2.0 Pro leads with 114.0 among models released by February 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 February 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 Seed2.0 Pro 114.0
- 2
Ring-2.5-1T 105.0 - 3
DeepSeek-V3.2-Speciale 102.0
Source: Labs’ model cards
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Seed2.0 Pro | 114.0 | Feb 2026 | Lab model card | |
| 2 | Ring-2.5-1T | 105.0 | Feb 2026 | Lab model card | |
| 3 | DeepSeek-V3.2-Speciale | 102.0 | Dec 2025 | Lab model card |
3 models have held number one in labs’ own numbers since its release in November 2025
Lab claims count from the day the card came out, independent runs from the model’s release.
Source: Labs’ model cards
Scores over time
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 February 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 |
|---|---|---|---|
| Feb 14, 2026 | Seed2.0 Pro | 114 | CMO 2025, 114/126, gold (Table 2) |
| Feb 10, 2026 | Ring-2.5-1T | 105 | CMO 2025 (full score 126), self-tested |
2 system cards report it, from 2 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 |
|---|---|---|---|---|
| Feb 14, 2026 | Seed2.0 Pro model card | 114 | CMO 2025, 114/126 points, gold (Table 2) | Capabilities |
| Dec 1, 2025 | DeepSeek-V3.2-Speciale technical report | 102 | CMO 2025 (English version), 102/126 points, gold medal (Table 4) | 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%