# Claude 3 Sonnet vs Mistral Medium 3.5

> Mistral Medium 3.5 is the stronger model overall, scoring 39.6 to 28.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-mistral-medium-3-5
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Claude 3 Sonnet scores higher in 1 category and Mistral Medium 3.5 in 8 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Mistral Medium 3.5 leads 36.4 to 10.0.
- Mistral Medium 3.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 28.8 | 39.6 |
| Rank | 311 | 151 |
| Context | — | 262K |
| Input $/M | — | $1.50 |
| Output $/M | — | $7.50 |
| Weights | Proprietary | Open |

## Coding

- Claude 3 Sonnet: 29.2 (#296)
- Mistral Medium 3.5: 35.7 (#208)

| Benchmark | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| LMArena Coding | 1223 | 1461 |
| LMArena WebDev | — | 1263 |
| WeirdML | 10.2% | — |
| BigCodeBench Instruct | 42.7% | — |
| BigCodeBench Complete | 53.8% | — |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |

## Reasoning

- Claude 3 Sonnet: 19.7 (#232)
- Mistral Medium 3.5: 16.6 (#290)

| Benchmark | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| LMArena Hard Prompts | 1197 | 1436 |
| Epoch Capabilities Index | 120.69 | 141.42 |
| Kagi LLM Benchmark | — | 41.4% |
| NYT Connections (extended) | — | 12.9% |
| DTBench | 53.6% | — |
| WinoGrande | 75.1% | — |

## Math

- Claude 3 Sonnet: 10.0 (#305)
- Mistral Medium 3.5: 36.4 (#113)

| Benchmark | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| LMArena Math | 1213 | 1432 |
| OTIS Mock AIME 2024-2025 | 2.5% | — |
| MATH Level 5 | 18.2% | — |

## Knowledge

- Claude 3 Sonnet: 21.1 (#271)
- Mistral Medium 3.5: 39.3 (#123)

| Benchmark | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| LMArena Expert | 1173 | 1431 |
| GPQA Diamond | 40.6% | — |
| MMLU | 75.9% | — |

## Multimodal

- Claude 3 Sonnet: 24.7 (#120)
- Mistral Medium 3.5: 37.6 (#64)

| Benchmark | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| LMArena Vision | 984 | 1222 |

## Multilingual

- Claude 3 Sonnet: 38.0 (#229)
- Mistral Medium 3.5: 52.1 (#93)

| Benchmark | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| LMArena Non-English | 1205 | 1405 |
| LMArena Chinese | 1188 | 1443 |
| LMArena French | 1228 | 1448 |
| LMArena German | 1204 | 1453 |
| LMArena Korean | 1128 | 1387 |
| LMArena Russian | 1227 | 1396 |
| LMArena Spanish | 1204 | 1406 |
| LMArena Japanese | 1131 | — |

## Instruction Following

- Claude 3 Sonnet: 63.1 (#230)
- Mistral Medium 3.5: 74.7 (#87)

| Benchmark | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| LMArena Instruction Following | 1200 | 1414 |

## Long Context

- Claude 3 Sonnet: 36.7 (#223)
- Mistral Medium 3.5: 43.2 (#101)

| Benchmark | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| LMArena Longer Query | 1211 | 1414 |

## Writing & Preference

- Claude 3 Sonnet: 42.3 (#233)
- Mistral Medium 3.5: 58.6 (#113)

| Benchmark | Claude 3 Sonnet | Mistral Medium 3.5 |
|---|---|---|
| LMArena Text | 1218 | 1421 |
| LMArena Creative Writing | 1186 | 1372 |
| LMArena Multi-Turn | 1227 | 1423 |
| EQ-Bench 4 | — | 993 |

## FAQ

### Is Claude 3 Sonnet better than Mistral Medium 3.5?

Mistral Medium 3.5 is the stronger model overall, scoring 39.6 to 28.8 on the Noometry Index.

### Is Claude 3 Sonnet or Mistral Medium 3.5 better for coding?

Mistral Medium 3.5 scores higher on coding benchmarks: 35.7 versus 29.2 in the Noometry coding category.

### How many benchmarks do Claude 3 Sonnet and Mistral Medium 3.5 share?

18 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Mistral Medium 3.5 has 22.