# Mistral Small 3.1 vs Mixtral 8x7B

> Mistral Small 3.1 is the stronger model overall, scoring 31.4 to 26.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mistral-small-3-1-vs-mixtral-8x7b
- Last updated: 2026-10-10
- Shared benchmarks: 24

## Summary

- They share 24 benchmarks with published results for both. Mistral Small 3.1 scores higher in 7 categories and Mixtral 8x7B in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in instruction following, where Mistral Small 3.1 leads 63.8 to 51.2.
- The biggest single-benchmark swing is MMLU-Pro: 61% for Mistral Small 3.1 and 33.5% for Mixtral 8x7B.
- Mistral Small 3.1 is cheaper at $0.35 / $0.56 per million input/output tokens, against $0.70 / $0.70 for Mixtral 8x7B.
- Mistral Small 3.1 accepts more context: 128K tokens versus 32K.

## Snapshot

| | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| Provider | Mistral AI | Mistral AI |
| Noometry Index | 31.4 | 26.8 |
| Rank | 263 | 328 |
| Context | 128K | 32K |
| Input $/M | $0.35 | $0.70 |
| Output $/M | $0.56 | $0.70 |
| Weights | Open | Open |

## Coding

- Mistral Small 3.1: 37.7 (#175)
- Mixtral 8x7B: 32.2 (#265)

| Benchmark | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Coding | 1309 | 1127 |
| HumanEval+ | — | 39.6% |
| MBPP+ | — | 49.7% |

## Reasoning

- Mistral Small 3.1: 18.9 (#249)
- Mixtral 8x7B: 17.4 (#283)

| Benchmark | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Hard Prompts | 1278 | 1115 |
| Epoch Capabilities Index | 127.48 | 118.38 |
| Chess Puzzles | 1% | — |
| DTBench | — | 49.6% |
| Adversarial NLI | — | 55.2% |
| ForecastBench | — | 56.3 |
| HellaSwag | — | 86.7% |
| PIQA | — | 83.6% |
| WinoGrande | — | 77.2% |

## Math

- Mistral Small 3.1: 13.7 (#295)
- Mixtral 8x7B: 17.2 (#284)

| Benchmark | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| Omni-MATH | 24.8% | 10.5% |
| LMArena Math | 1261 | 1147 |
| OTIS Mock AIME 2024-2025 | 3.9% | — |
| MATH Level 5 | — | 10% |
| GSM8K | — | 74.4% |

## Knowledge

- Mistral Small 3.1: 22.6 (#266)
- Mixtral 8x7B: 11.0 (#296)

| Benchmark | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| GPQA Diamond | 41.9% | 30.6% |
| MMLU-Pro | 61% | 33.5% |
| GPQA (HELM) | 39.2% | 29.6% |
| LMArena Expert | 1258 | 1088 |
| ARC (AI2) Challenge | — | 87.3% |
| MMLU | — | 70.6% |
| OpenBookQA | — | 85.8% |
| TriviaQA | — | 82.2% |

## Multimodal

- Mistral Small 3.1: 32.6 (#93)
- Mixtral 8x7B: —

| Benchmark | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Vision | 1136 | — |

## Multilingual

- Mistral Small 3.1: 41.4 (#204)
- Mixtral 8x7B: 29.8 (#261)

| Benchmark | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Non-English | 1255 | 1077 |
| LMArena Chinese | 1254 | 1055 |
| LMArena French | 1270 | 1165 |
| LMArena German | 1266 | 1114 |
| LMArena Japanese | 1210 | 931 |
| LMArena Korean | 1206 | 968 |
| LMArena Russian | 1263 | 1090 |
| LMArena Spanish | 1283 | 1110 |

## Instruction Following

- Mistral Small 3.1: 63.8 (#225)
- Mixtral 8x7B: 51.2 (#292)

| Benchmark | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| IFEval | 75% | 57.5% |
| LMArena Instruction Following | 1264 | 1110 |

## Long Context

- Mistral Small 3.1: 39.5 (#172)
- Mixtral 8x7B: 33.4 (#255)

| Benchmark | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Longer Query | 1300 | 1103 |

## Writing & Preference

- Mistral Small 3.1: 37.2 (#254)
- Mixtral 8x7B: 34.4 (#265)

| Benchmark | Mistral Small 3.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Text | 1278 | 1132 |
| LMArena Creative Writing | 1253 | 1109 |
| WildBench | 78.8% | 67.3% |
| LMArena Multi-Turn | 1270 | 1115 |
| EQ-Bench Creative Writing | 761 | — |

## FAQ

### Is Mistral Small 3.1 better than Mixtral 8x7B?

Mistral Small 3.1 is the stronger model overall, scoring 31.4 to 26.8 on the Noometry Index.

### Which is cheaper, Mistral Small 3.1 or Mixtral 8x7B?

Mistral Small 3.1 is cheaper. It lists at $0.35 per million input tokens and $0.56 per million output tokens; Mixtral 8x7B lists at $0.70 and $0.70.

### Is Mistral Small 3.1 or Mixtral 8x7B better for coding?

Mistral Small 3.1 scores higher on coding benchmarks: 37.7 versus 32.2 in the Noometry coding category.

### Which has the bigger context window?

Mistral Small 3.1 does, with 128K tokens against 32K.

### How many benchmarks do Mistral Small 3.1 and Mixtral 8x7B share?

24 benchmarks have published results for both models. Mistral Small 3.1 has 28 scored results on Noometry and Mixtral 8x7B has 38.