Project Euler (MathArena)
Gemini 3.1 Pro 89% leads since February 2026 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.
- Released
- September 2025
- Kind
- Competition problems with answers
- Level
- Expert
- Scored
- Checked automatically
- Answers
- Short answer
- Tasks
- All public
- Strongest model tested
- GPT-5.4 #27 on the capability index
- Last model added
- May 2026
- Scores refreshed
- November 12th, 2026
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 November 12th, 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:
- Claude Fable 5.2
- Gemini 4 Carbon
- GPT-6 Astra
- Claude Opus 5.5
- and 16 more
- 1 Gemini 3.1 Pro high 89%
- 2 GPT-5.4 xhigh 89%
- 3 Gemini 3.5 Flash high 82%
- 4 GLM-5.1 67.2%
Source: Official Project Euler (MathArena) leaderboard
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Gemini 3.1 Pro | 89% | high | Feb 2026 | Official leaderboard |
| 2 | GPT-5.4 | 89% | xhigh | Mar 2026 | Official leaderboard |
| 3 | Gemini 3.5 Flash | 82% | high | 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.
Source: Official Project Euler (MathArena) leaderboard
Gemini 3.1 Pro on the official leaderboard 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: Official Project Euler (MathArena) leaderboard
No lab model card reports it yet
We read the headline results of 522 launch posts from 52 labs, and none of them list this benchmark.
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