# Mistral Medium 3.1 vs Mistral Medium 3.5

> Mistral Medium 3.5 is the stronger model overall, scoring 39.6 to 31.5 on the Noometry Index. Mistral Medium 3.1 costs 3.8× less per token, which makes it the better buy when Mistral Medium 3.5's lead doesn't matter for your workload.

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

## Summary

- They share 1 benchmark with published results for both. Mistral Medium 3.1 scores higher in 0 categories and Mistral Medium 3.5 in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Mistral Medium 3.5 leads 16.6 to 10.1.
- The biggest single-benchmark swing is NYT Connections (extended): 6.5% for Mistral Medium 3.1 and 12.9% for Mistral Medium 3.5.
- Mistral Medium 3.1 is cheaper at $0.40 / $2 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium 3.5.
- Mistral Medium 3.5 accepts more context: 262K tokens versus 131K.
- Mistral Medium 3.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| Provider | Mistral AI | Mistral AI |
| Noometry Index | 31.5 | 39.6 |
| Rank | 260 | 151 |
| Context | 131K | 262K |
| Input $/M | $0.40 | $1.50 |
| Output $/M | $2 | $7.50 |
| Weights | Proprietary | Open |

## Coding

- Mistral Medium 3.1: —
- Mistral Medium 3.5: 35.7 (#208)

| Benchmark | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| LMArena WebDev | — | 1263 |
| LMArena Coding | — | 1461 |

## Reasoning

- Mistral Medium 3.1: 10.1 (#336)
- Mistral Medium 3.5: 16.6 (#290)

| Benchmark | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| NYT Connections (extended) | 6.5% | 12.9% |
| Kagi LLM Benchmark | — | 41.4% |
| Thematic Generalization | 20.3% | — |
| LMArena Hard Prompts | — | 1436 |
| Epoch Capabilities Index | — | 141.42 |

## Math

- Mistral Medium 3.1: —
- Mistral Medium 3.5: 36.4 (#113)

| Benchmark | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Math | — | 1432 |

## Knowledge

- Mistral Medium 3.1: —
- Mistral Medium 3.5: 39.3 (#123)

| Benchmark | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Expert | — | 1431 |

## Multimodal

- Mistral Medium 3.1: —
- Mistral Medium 3.5: 37.6 (#64)

| Benchmark | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Vision | — | 1222 |

## Multilingual

- Mistral Medium 3.1: —
- Mistral Medium 3.5: 52.1 (#93)

| Benchmark | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Non-English | — | 1405 |
| LMArena Chinese | — | 1443 |
| LMArena French | — | 1448 |
| LMArena German | — | 1453 |
| LMArena Korean | — | 1387 |
| LMArena Russian | — | 1396 |
| LMArena Spanish | — | 1406 |

## Instruction Following

- Mistral Medium 3.1: —
- Mistral Medium 3.5: 74.7 (#87)

| Benchmark | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Instruction Following | — | 1414 |

## Long Context

- Mistral Medium 3.1: —
- Mistral Medium 3.5: 43.2 (#101)

| Benchmark | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Longer Query | — | 1414 |

## Writing & Preference

- Mistral Medium 3.1: 55.6 (#140)
- Mistral Medium 3.5: 58.6 (#113)

| Benchmark | Mistral Medium 3.1 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Text | — | 1421 |
| LMArena Creative Writing | — | 1372 |
| EQ-Bench Creative Writing | 1476 | — |
| EQ-Bench 4 | — | 993 |
| LMArena Multi-Turn | — | 1423 |

## FAQ

### Is Mistral Medium 3.1 better than Mistral Medium 3.5?

Mistral Medium 3.5 is the stronger model overall, scoring 39.6 to 31.5 on the Noometry Index. Mistral Medium 3.1 costs 3.8× less per token, which makes it the better buy when Mistral Medium 3.5's lead doesn't matter for your workload.

### Which is cheaper, Mistral Medium 3.1 or Mistral Medium 3.5?

Mistral Medium 3.1 is cheaper. It lists at $0.40 per million input tokens and $2 per million output tokens; Mistral Medium 3.5 lists at $1.50 and $7.50.

### Which has the bigger context window?

Mistral Medium 3.5 does, with 262K tokens against 131K.

### How many benchmarks do Mistral Medium 3.1 and Mistral Medium 3.5 share?

1 benchmark has published results for both models. Mistral Medium 3.1 has 3 scored results on Noometry and Mistral Medium 3.5 has 22.