# Claude 3 Sonnet vs Mistral Small 3.1

> Mistral Small 3.1 is the stronger model overall, scoring 31.4 to 28.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-mistral-small-3-1
- Last updated: 2026-10-10
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. Claude 3 Sonnet scores higher in 2 categories and Mistral Small 3.1 in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in coding, where Mistral Small 3.1 leads 37.7 to 29.2.
- Mistral Small 3.1 has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 28.8 | 31.4 |
| Rank | 311 | 263 |
| Context | — | 128K |
| Input $/M | — | $0.35 |
| Output $/M | — | $0.56 |
| Weights | Proprietary | Open |

## Coding

- Claude 3 Sonnet: 29.2 (#296)
- Mistral Small 3.1: 37.7 (#175)

| Benchmark | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| LMArena Coding | 1223 | 1309 |
| WeirdML | 10.2% | — |
| BigCodeBench Instruct | 42.7% | — |
| BigCodeBench Complete | 53.8% | — |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |

## Reasoning

- Claude 3 Sonnet: 19.7 (#232)
- Mistral Small 3.1: 18.9 (#249)

| Benchmark | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| LMArena Hard Prompts | 1197 | 1278 |
| Epoch Capabilities Index | 120.69 | 127.48 |
| Chess Puzzles | — | 1% |
| DTBench | 53.6% | — |
| WinoGrande | 75.1% | — |

## Math

- Claude 3 Sonnet: 10.0 (#305)
- Mistral Small 3.1: 13.7 (#295)

| Benchmark | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | 3.9% |
| LMArena Math | 1213 | 1261 |
| Omni-MATH | — | 24.8% |
| MATH Level 5 | 18.2% | — |

## Knowledge

- Claude 3 Sonnet: 21.1 (#271)
- Mistral Small 3.1: 22.6 (#266)

| Benchmark | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| GPQA Diamond | 40.6% | 41.9% |
| LMArena Expert | 1173 | 1258 |
| MMLU-Pro | — | 61% |
| GPQA (HELM) | — | 39.2% |
| MMLU | 75.9% | — |

## Multimodal

- Claude 3 Sonnet: 24.7 (#120)
- Mistral Small 3.1: 32.6 (#93)

| Benchmark | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| LMArena Vision | 984 | 1136 |

## Multilingual

- Claude 3 Sonnet: 38.0 (#229)
- Mistral Small 3.1: 41.4 (#204)

| Benchmark | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| LMArena Non-English | 1205 | 1255 |
| LMArena Chinese | 1188 | 1254 |
| LMArena French | 1228 | 1270 |
| LMArena German | 1204 | 1266 |
| LMArena Japanese | 1131 | 1210 |
| LMArena Korean | 1128 | 1206 |
| LMArena Russian | 1227 | 1263 |
| LMArena Spanish | 1204 | 1283 |

## Instruction Following

- Claude 3 Sonnet: 63.1 (#230)
- Mistral Small 3.1: 63.8 (#225)

| Benchmark | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| LMArena Instruction Following | 1200 | 1264 |
| IFEval | — | 75% |

## Long Context

- Claude 3 Sonnet: 36.7 (#223)
- Mistral Small 3.1: 39.5 (#172)

| Benchmark | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| LMArena Longer Query | 1211 | 1300 |

## Writing & Preference

- Claude 3 Sonnet: 42.3 (#233)
- Mistral Small 3.1: 37.2 (#254)

| Benchmark | Claude 3 Sonnet | Mistral Small 3.1 |
|---|---|---|
| LMArena Text | 1218 | 1278 |
| LMArena Creative Writing | 1186 | 1253 |
| LMArena Multi-Turn | 1227 | 1270 |
| EQ-Bench Creative Writing | — | 761 |
| WildBench | — | 78.8% |

## FAQ

### Is Claude 3 Sonnet better than Mistral Small 3.1?

Mistral Small 3.1 is the stronger model overall, scoring 31.4 to 28.8 on the Noometry Index.

### Is Claude 3 Sonnet or Mistral Small 3.1 better for coding?

Mistral Small 3.1 scores higher on coding benchmarks: 37.7 versus 29.2 in the Noometry coding category.

### How many benchmarks do Claude 3 Sonnet and Mistral Small 3.1 share?

21 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Mistral Small 3.1 has 28.