Project Euler (MathArena)
Gemini 3.1 Pro 89% leads since Feb 2026 Not in model cards Models solve recent Project Euler problems that need both mathematical insight and code. MathArena adds problems as Project Euler releases them, starting from problem 943.
The set held 50 problems and 18 models when MathArena marked it deprecated. MathArena withholds its agent code to avoid Project Euler leaderboard cheating.
- 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.
2 models share the top score of 89% among models released by May 2026
Best score per model from the benchmark's own leaderboard, read on 2 Nov 2026. 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:
- GPT-6 Astra
- Claude Opus 5.5
- GPT-6.1 Terra
- GPT-6.1 Sol
- and 16 more
- 1 Gemini 3.1 Pro 89%
- 2 GPT-5.4 xhigh 89%
- 3 Gemini 3.5 Flash 82%
- 4 GLM-5.1 67.2%
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Gemini 3.1 Pro | 89% | Feb 2026 | Official leaderboard | |
| 2 | GPT-5.4 | 89% | xhigh | Mar 2026 | Official leaderboard |
| 3 | Gemini 3.5 Flash | 82% | May 2026 | Official leaderboard | |
| 4 | GLM-5.1 | 67.2% | Apr 2026 | Official leaderboard |
Number one over time
Lab claims count from the day the card came out, independent runs from the model’s release.
The best score passed 85% in Feb 2026
All the scores we have, one dot each, so a model tested at several settings appears more than once.
No lab model card reports it yet
We read the headline results of 479 launch posts from 51 labs, and none of them list this benchmark.
More 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%