# Claude 2.1 vs Mistral Small 3.1

> Mistral Small 3.1 is the stronger model overall, scoring 31.4 to 24.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-mistral-small-3-1
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. Claude 2.1 scores higher in 1 category and Mistral Small 3.1 in 3 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in coding, where Mistral Small 3.1 leads 37.7 to 25.8.
- The biggest single-benchmark swing is GPQA Diamond: 33% for Claude 2.1 and 41.9% for Mistral Small 3.1.
- Mistral Small 3.1 has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 24.9 | 31.4 |
| Rank | 340 | 263 |
| Context | — | 128K |
| Input $/M | — | $0.35 |
| Output $/M | — | $0.56 |
| Weights | Proprietary | Open |

## Coding

- Claude 2.1: 25.8 (#322)
- Mistral Small 3.1: 37.7 (#175)

| Benchmark | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| WeirdML | 7.1% | — |
| LMArena Coding | — | 1309 |

## Reasoning

- Claude 2.1: 20.6 (#216)
- Mistral Small 3.1: 18.9 (#249)

| Benchmark | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| Epoch Capabilities Index | 119.22 | 127.48 |
| Chess Puzzles | — | 1% |
| LMArena Hard Prompts | — | 1278 |
| DTBench | 51% | — |
| ForecastBench | 54.2 | — |

## Math

- Claude 2.1: 9.6 (#309)
- Mistral Small 3.1: 13.7 (#295)

| Benchmark | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 3.9% |
| Omni-MATH | — | 24.8% |
| LMArena Math | — | 1261 |

## Knowledge

- Claude 2.1: 15.5 (#287)
- Mistral Small 3.1: 22.6 (#266)

| Benchmark | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| GPQA Diamond | 33% | 41.9% |
| MMLU-Pro | — | 61% |
| GPQA (HELM) | — | 39.2% |
| LMArena Expert | — | 1258 |
| MMLU | 73.5% | — |

## Multimodal

- Claude 2.1: —
- Mistral Small 3.1: 32.6 (#93)

| Benchmark | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| LMArena Vision | — | 1136 |

## Multilingual

- Claude 2.1: —
- Mistral Small 3.1: 41.4 (#204)

| Benchmark | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| LMArena Non-English | — | 1255 |
| LMArena Chinese | — | 1254 |
| LMArena French | — | 1270 |
| LMArena German | — | 1266 |
| LMArena Japanese | — | 1210 |
| LMArena Korean | — | 1206 |
| LMArena Russian | — | 1263 |
| LMArena Spanish | — | 1283 |

## Instruction Following

- Claude 2.1: —
- Mistral Small 3.1: 63.8 (#225)

| Benchmark | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| IFEval | — | 75% |
| LMArena Instruction Following | — | 1264 |

## Long Context

- Claude 2.1: —
- Mistral Small 3.1: 39.5 (#172)

| Benchmark | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| LMArena Longer Query | — | 1300 |

## Writing & Preference

- Claude 2.1: —
- Mistral Small 3.1: 37.2 (#254)

| Benchmark | Claude 2.1 | Mistral Small 3.1 |
|---|---|---|
| LMArena Text | — | 1278 |
| LMArena Creative Writing | — | 1253 |
| EQ-Bench Creative Writing | — | 761 |
| WildBench | — | 78.8% |
| LMArena Multi-Turn | — | 1270 |

## FAQ

### Is Claude 2.1 better than Mistral Small 3.1?

Mistral Small 3.1 is the stronger model overall, scoring 31.4 to 24.9 on the Noometry Index.

### Is Claude 2.1 or Mistral Small 3.1 better for coding?

Mistral Small 3.1 scores higher on coding benchmarks: 37.7 versus 25.8 in the Noometry coding category.

### How many benchmarks do Claude 2.1 and Mistral Small 3.1 share?

3 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Mistral Small 3.1 has 28.