# Mistral Small 3.1 vs o1-mini

> o1-mini is the stronger model overall, scoring 34.0 to 31.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mistral-small-3-1-vs-o1-mini
- Last updated: 2026-10-11
- Shared benchmarks: 20

## Summary

- They share 20 benchmarks with published results for both. Mistral Small 3.1 scores higher in 2 categories and o1-mini in 6 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where o1-mini leads 35.4 to 14.7.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 3.9% for Mistral Small 3.1 and 46.9% for o1-mini.
- Mistral Small 3.1 has downloadable open weights; the other is API-only.

## Snapshot

| | Mistral Small 3.1 | o1-mini |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 31.7 | 34.0 |
| Rank | 269 | 235 |
| Context | 128K | — |
| Input $/M | $0.35 | — |
| Output $/M | $0.56 | — |
| Weights | Open | Proprietary |

## Coding

- Mistral Small 3.1: 38.3 (#179)
- o1-mini: 35.5 (#224)

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| LMArena Coding | 1309 | 1362 |
| Aider Polyglot | — | 32.9% |
| WeirdML | — | 36.3% |
| LiveBench Coding | — | 48% |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |

## Agentic & Tool Use

- Mistral Small 3.1: —
- o1-mini: 24.6 (#118)

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| Cybench | — | 10% |

## Reasoning

- Mistral Small 3.1: 19.7 (#254)
- o1-mini: 8.8 (#346)

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| LMArena Hard Prompts | 1278 | 1333 |
| Epoch Capabilities Index | 127.48 | 135.82 |
| ARC-AGI-2 | — | 0.8% |
| SimpleBench | — | 18.1% |
| ARC-AGI-1 | — | 14% |
| Chess Puzzles | 1% | — |
| LiveBench Reasoning | — | 72.3% |
| LiveBench Data Analysis | — | 57.9% |
| LiveBench | — | 57.8% |

## Math

- Mistral Small 3.1: 14.7 (#301)
- o1-mini: 35.4 (#186)

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 3.9% | 46.9% |
| LMArena Math | 1262 | 1358 |
| Omni-MATH | 24.8% | — |
| LiveBench Math | — | 62% |
| MATH Level 5 | — | 89.2% |
| FrontierMath (Feb 2025 set) | — | 1.7% |

## Knowledge

- Mistral Small 3.1: 22.6 (#271)
- o1-mini: 34.9 (#192)

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| GPQA Diamond | 41.9% | 62.4% |
| LMArena Expert | 1257 | 1316 |
| MMLU-Pro | 61% | — |
| Confabulations | — | 18.6% |
| GPQA (HELM) | 39.2% | — |

## Multimodal

- Mistral Small 3.1: 33.2 (#99)
- o1-mini: —

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| LMArena Vision | 1136 | — |

## Multilingual

- Mistral Small 3.1: 41.2 (#209)
- o1-mini: 43.6 (#182)

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| LMArena Non-English | 1255 | 1289 |
| LMArena Chinese | 1253 | 1314 |
| LMArena French | 1273 | 1293 |
| LMArena German | 1266 | 1278 |
| LMArena Japanese | 1208 | 1245 |
| LMArena Korean | 1206 | 1223 |
| LMArena Russian | 1263 | 1283 |
| LMArena Spanish | 1283 | 1303 |

## Instruction Following

- Mistral Small 3.1: 63.6 (#230)
- o1-mini: 66.7 (#206)

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| LMArena Instruction Following | 1264 | 1304 |
| LiveBench Instruction Following | — | 65.4% |
| IFEval | 75% | — |

## Long Context

- Mistral Small 3.1: 39.5 (#178)
- o1-mini: 40.1 (#161)

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| LMArena Longer Query | 1299 | 1320 |

## Writing & Preference

- Mistral Small 3.1: 37.0 (#259)
- o1-mini: 48.4 (#202)

| Benchmark | Mistral Small 3.1 | o1-mini |
|---|---|---|
| LMArena Text | 1277 | 1317 |
| LMArena Creative Writing | 1253 | 1244 |
| LMArena Multi-Turn | 1270 | 1314 |
| Short-Story Creative Writing | — | 64.9% |
| EQ-Bench Creative Writing | 761 | — |
| WildBench | 78.8% | — |
| LiveBench Language | — | 40.9% |

## FAQ

### Is Mistral Small 3.1 better than o1-mini?

o1-mini is the stronger model overall, scoring 34.0 to 31.7 on the Noometry Index.

### Is Mistral Small 3.1 or o1-mini better for coding?

Mistral Small 3.1 scores higher on coding benchmarks: 38.3 versus 35.5 in the Noometry coding category.

### How many benchmarks do Mistral Small 3.1 and o1-mini share?

20 benchmarks have published results for both models. Mistral Small 3.1 has 28 scored results on Noometry and o1-mini has 39.