# MiMo-V2.5 vs Mistral Small 3.1

> MiMo-V2.5 is the stronger model overall, scoring 43.4 to 31.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mimo-v2-5-vs-mistral-small-3-1
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. MiMo-V2.5 scores higher in 9 categories and Mistral Small 3.1 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where MiMo-V2.5 leads 61.6 to 37.0.
- MiMo-V2.5 is cheaper at $0.14 / $0.28 per million input/output tokens, against $0.35 / $0.56 for Mistral Small 3.1.
- MiMo-V2.5 accepts more context: 1.05M tokens versus 128K.

## Snapshot

| | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| Provider | Xiaomi | Mistral AI |
| Noometry Index | 43.4 | 31.7 |
| Rank | 93 | 269 |
| Context | 1.05M | 128K |
| Input $/M | $0.14 | $0.35 |
| Output $/M | $0.28 | $0.56 |
| Weights | Open | Open |

## Coding

- MiMo-V2.5: 43.9 (#81)
- Mistral Small 3.1: 38.3 (#179)

| Benchmark | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| LMArena Coding | 1469 | 1309 |
| LMArena WebDev | 1438 | — |
| SciCode | 43.1% | — |
| ALE-Bench | 513.95 | — |

## Reasoning

- MiMo-V2.5: 28.6 (#101)
- Mistral Small 3.1: 19.7 (#254)

| Benchmark | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| LMArena Hard Prompts | 1450 | 1278 |
| CritPt | 3.7% | — |
| Chess Puzzles | — | 1% |
| Epoch Capabilities Index | — | 127.48 |

## Math

- MiMo-V2.5: 36.8 (#163)
- Mistral Small 3.1: 14.7 (#301)

| Benchmark | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| LMArena Math | 1436 | 1262 |
| OTIS Mock AIME 2024-2025 | — | 3.9% |
| ProofBench | 16% | — |
| Omni-MATH | — | 24.8% |

## Knowledge

- MiMo-V2.5: 40.8 (#115)
- Mistral Small 3.1: 22.6 (#271)

| Benchmark | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| LMArena Expert | 1460 | 1257 |
| GPQA Diamond | — | 41.9% |
| MMLU-Pro | — | 61% |
| GPQA (HELM) | — | 39.2% |

## Multimodal

- MiMo-V2.5: 39.8 (#54)
- Mistral Small 3.1: 33.2 (#99)

| Benchmark | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| LMArena Vision | 1247 | 1136 |

## Multilingual

- MiMo-V2.5: 51.9 (#99)
- Mistral Small 3.1: 41.2 (#209)

| Benchmark | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| LMArena Non-English | 1404 | 1255 |
| LMArena Chinese | 1468 | 1253 |
| LMArena French | 1447 | 1273 |
| LMArena German | 1421 | 1266 |
| LMArena Japanese | 1306 | 1208 |
| LMArena Korean | 1363 | 1206 |
| LMArena Russian | 1395 | 1263 |
| LMArena Spanish | 1416 | 1283 |

## Instruction Following

- MiMo-V2.5: 75.5 (#60)
- Mistral Small 3.1: 63.6 (#230)

| Benchmark | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| LMArena Instruction Following | 1434 | 1264 |
| IFEval | — | 75% |

## Long Context

- MiMo-V2.5: 44.2 (#73)
- Mistral Small 3.1: 39.5 (#178)

| Benchmark | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| LMArena Longer Query | 1445 | 1299 |

## Writing & Preference

- MiMo-V2.5: 61.6 (#86)
- Mistral Small 3.1: 37.0 (#259)

| Benchmark | MiMo-V2.5 | Mistral Small 3.1 |
|---|---|---|
| LMArena Text | 1428 | 1277 |
| LMArena Creative Writing | 1393 | 1253 |
| LMArena Multi-Turn | 1445 | 1270 |
| EQ-Bench Creative Writing | — | 761 |
| WildBench | — | 78.8% |

## FAQ

### Is MiMo-V2.5 better than Mistral Small 3.1?

MiMo-V2.5 is the stronger model overall, scoring 43.4 to 31.7 on the Noometry Index.

### Which is cheaper, MiMo-V2.5 or Mistral Small 3.1?

MiMo-V2.5 is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; Mistral Small 3.1 lists at $0.35 and $0.56.

### Is MiMo-V2.5 or Mistral Small 3.1 better for coding?

MiMo-V2.5 scores higher on coding benchmarks: 43.9 versus 38.3 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2.5 does, with 1.05M tokens against 128K.

### How many benchmarks do MiMo-V2.5 and Mistral Small 3.1 share?

18 benchmarks have published results for both models. MiMo-V2.5 has 23 scored results on Noometry and Mistral Small 3.1 has 28.