# Mistral Small 3.1 vs o1-pro

> Mistral Small 3.1 and o1-pro score almost the same on the Noometry Index (31.7 vs 31.5), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/mistral-small-3-1-vs-o1-pro
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in knowledge, where o1-pro leads 29.7 to 22.6.
- Mistral Small 3.1 is cheaper at $0.35 / $0.56 per million input/output tokens, against $150 / $600 for o1-pro.
- o1-pro accepts more context: 200K tokens versus 128K.
- Mistral Small 3.1 has downloadable open weights; the other is API-only.

## Snapshot

| | Mistral Small 3.1 | o1-pro |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 31.7 | 31.5 |
| Rank | 269 | 271 |
| Context | 128K | 200K |
| Input $/M | $0.35 | $150 |
| Output $/M | $0.56 | $600 |
| Weights | Open | Proprietary |

## Coding

- Mistral Small 3.1: 38.3 (#179)
- o1-pro: —

| Benchmark | Mistral Small 3.1 | o1-pro |
|---|---|---|
| LMArena Coding | 1309 | — |

## Reasoning

- Mistral Small 3.1: 19.7 (#254)
- o1-pro: 20.4 (#239)

| Benchmark | Mistral Small 3.1 | o1-pro |
|---|---|---|
| ARC-AGI-1 | — | 23.3% |
| Chess Puzzles | 1% | — |
| EnigmaEval | — | 6.1% |
| LMArena Hard Prompts | 1278 | — |
| Epoch Capabilities Index | 127.48 | — |

## Math

- Mistral Small 3.1: 14.7 (#301)
- o1-pro: —

| Benchmark | Mistral Small 3.1 | o1-pro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 3.9% | — |
| Omni-MATH | 24.8% | — |
| LMArena Math | 1262 | — |

## Knowledge

- Mistral Small 3.1: 22.6 (#271)
- o1-pro: 29.7 (#234)

| Benchmark | Mistral Small 3.1 | o1-pro |
|---|---|---|
| GPQA Diamond | 41.9% | — |
| Humanity's Last Exam | — | 8.1% |
| MMLU-Pro | 61% | — |
| GPQA (HELM) | 39.2% | — |
| LMArena Expert | 1257 | — |

## Multimodal

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

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

## Multilingual

- Mistral Small 3.1: 41.2 (#209)
- o1-pro: —

| Benchmark | Mistral Small 3.1 | o1-pro |
|---|---|---|
| LMArena Non-English | 1255 | — |
| LMArena Chinese | 1253 | — |
| LMArena French | 1273 | — |
| LMArena German | 1266 | — |
| LMArena Japanese | 1208 | — |
| LMArena Korean | 1206 | — |
| LMArena Russian | 1263 | — |
| LMArena Spanish | 1283 | — |

## Instruction Following

- Mistral Small 3.1: 63.6 (#230)
- o1-pro: —

| Benchmark | Mistral Small 3.1 | o1-pro |
|---|---|---|
| IFEval | 75% | — |
| LMArena Instruction Following | 1264 | — |

## Long Context

- Mistral Small 3.1: 39.5 (#178)
- o1-pro: —

| Benchmark | Mistral Small 3.1 | o1-pro |
|---|---|---|
| LMArena Longer Query | 1299 | — |

## Writing & Preference

- Mistral Small 3.1: 37.0 (#259)
- o1-pro: —

| Benchmark | Mistral Small 3.1 | o1-pro |
|---|---|---|
| LMArena Text | 1277 | — |
| LMArena Creative Writing | 1253 | — |
| EQ-Bench Creative Writing | 761 | — |
| WildBench | 78.8% | — |
| LMArena Multi-Turn | 1270 | — |

## FAQ

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

Mistral Small 3.1 and o1-pro score almost the same on the Noometry Index (31.7 vs 31.5), so choose on price, context window or the category you care about most.

### Which is cheaper, Mistral Small 3.1 or o1-pro?

Mistral Small 3.1 is cheaper. It lists at $0.35 per million input tokens and $0.56 per million output tokens; o1-pro lists at $150 and $600.

### Which has the bigger context window?

o1-pro does, with 200K tokens against 128K.

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

0 benchmarks have published results for both models. Mistral Small 3.1 has 28 scored results on Noometry and o1-pro has 3.