# DeepSeek-V3.1 vs Mistral Medium

> DeepSeek-V3.1 is the stronger model overall, scoring 42.8 to 36.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/deepseek-v3-1-vs-mistral-medium
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. DeepSeek-V3.1 scores higher in 6 categories and Mistral Medium in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where DeepSeek-V3.1 leads 43.7 to 25.0.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 5.5% for DeepSeek-V3.1 and 22.7% for Mistral Medium.
- DeepSeek-V3.1 is cheaper at $0.25 / $0.95 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium.
- Mistral Medium accepts more context: 262K tokens versus 164K.

## Snapshot

| | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| Provider | DeepSeek | Mistral AI |
| Noometry Index | 42.8 | 36.3 |
| Rank | 108 | 218 |
| Context | 164K | 262K |
| Input $/M | $0.25 | $1.50 |
| Output $/M | $0.95 | $7.50 |
| Weights | Open | Open |

## Coding

- DeepSeek-V3.1: 40.3 (#144)
- Mistral Medium: 34.2 (#243)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| WeirdML | 38.4% | 43.7% |
| LMArena Coding | 1417 | 1434 |
| FrontierCode | — | 8% |
| SciCode | — | 40.2% |
| ALE-Bench | — | 763.98 |

## Agentic & Tool Use

- DeepSeek-V3.1: —
- Mistral Medium: 28.3 (#90)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 37.7% |

## Reasoning

- DeepSeek-V3.1: 27.9 (#110)
- Mistral Medium: 24.0 (#167)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| Kagi LLM Benchmark | 53.2% | 50% |
| LMArena Hard Prompts | 1417 | 1426 |
| DTBench | 82.7% | 75.5% |
| LMCA | 24.3% | 26.1% |
| SimpleBench | 40% | — |
| CritPt | — | 0% |
| Surface Evolver Bench | — | 26.9% |
| Epoch Capabilities Index | 139.92 | — |
| ForecastBench | 58 | — |

## Math

- DeepSeek-V3.1: 38.9 (#122)
- Mistral Medium: 28.1 (#245)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| LMArena Math | 1420 | 1408 |
| OTIS Mock AIME 2024-2025 | — | 32.2% |
| ProofBench | — | 9% |
| MATH Level 5 | — | 81.6% |
| FrontierMath (Feb 2025 set) | — | 0.3% |

## Knowledge

- DeepSeek-V3.1: 43.7 (#90)
- Mistral Medium: 25.0 (#265)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| Vectara Hallucination Rate | 5.5% | 22.7% |
| LMArena Expert | 1405 | 1408 |
| GPQA Diamond | — | 59.5% |
| Humanity's Last Exam | — | 4.5% |

## Multimodal

- DeepSeek-V3.1: —
- Mistral Medium: 35.3 (#88)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| LMArena Vision | — | 1172 |

## Multilingual

- DeepSeek-V3.1: 51.6 (#106)
- Mistral Medium: 52.1 (#91)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| LMArena Non-English | 1400 | 1408 |
| LMArena Chinese | 1469 | 1447 |
| LMArena French | 1447 | 1459 |
| LMArena German | 1411 | 1432 |
| LMArena Japanese | 1378 | 1378 |
| LMArena Korean | 1337 | 1380 |
| LMArena Russian | 1405 | 1411 |
| LMArena Spanish | 1431 | 1433 |

## Instruction Following

- DeepSeek-V3.1: 73.9 (#110)
- Mistral Medium: 73.7 (#116)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| LMArena Instruction Following | 1400 | 1398 |

## Long Context

- DeepSeek-V3.1: 36.3 (#232)
- Mistral Medium: 42.9 (#114)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| LMArena Longer Query | 1422 | 1406 |
| Fiction.LiveBench | 52.8% | — |

## Writing & Preference

- DeepSeek-V3.1: 60.3 (#98)
- Mistral Medium: 60.0 (#103)

| Benchmark | DeepSeek-V3.1 | Mistral Medium |
|---|---|---|
| LMArena Text | 1420 | 1424 |
| LMArena Creative Writing | 1401 | 1391 |
| LMArena Multi-Turn | 1408 | 1418 |
| Short-Story Creative Writing | — | 77.3% |
| EQ-Bench Creative Writing | 1436 | — |

## FAQ

### Is DeepSeek-V3.1 better than Mistral Medium?

DeepSeek-V3.1 is the stronger model overall, scoring 42.8 to 36.3 on the Noometry Index.

### Which is cheaper, DeepSeek-V3.1 or Mistral Medium?

DeepSeek-V3.1 is cheaper. It lists at $0.25 per million input tokens and $0.95 per million output tokens; Mistral Medium lists at $1.50 and $7.50.

### Is DeepSeek-V3.1 or Mistral Medium better for coding?

DeepSeek-V3.1 scores higher on coding benchmarks: 40.3 versus 34.2 in the Noometry coding category.

### Which has the bigger context window?

Mistral Medium does, with 262K tokens against 164K.

### How many benchmarks do DeepSeek-V3.1 and Mistral Medium share?

22 benchmarks have published results for both models. DeepSeek-V3.1 has 27 scored results on Noometry and Mistral Medium has 36.