# Llama 3.1-405B vs Mistral Medium 3.1

> Mistral Medium 3.1 is the stronger model overall, scoring 31.9 to 30.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/llama-3-1-405b-vs-mistral-medium-3-1
- Last updated: 2026-10-12
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Llama 3.1-405B scores higher in 1 category and Mistral Medium 3.1 in 1 category; 2 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Mistral Medium 3.1 leads 55.5 to 38.9.
- Llama 3.1-405B has downloadable open weights; the other is API-only.

## Snapshot

| | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| Provider | Meta | Mistral AI |
| Noometry Index | 30.7 | 31.9 |
| Rank | 288 | 266 |
| Context | — | 131K |
| Input $/M | — | $0.40 |
| Output $/M | — | $2 |
| Weights | Open | Proprietary |

## Coding

- Llama 3.1-405B: 33.1 (#262)
- Mistral Medium 3.1: —

| Benchmark | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| WeirdML | 21.4% | — |
| LMArena Coding | 1291 | — |

## Agentic & Tool Use

- Llama 3.1-405B: 21.0 (#140)
- Mistral Medium 3.1: —

| Benchmark | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| TheAgentCompany | 7.4% | — |
| Cybench | 7.5% | — |

## Reasoning

- Llama 3.1-405B: 16.8 (#300)
- Mistral Medium 3.1: 10.6 (#341)

| Benchmark | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| SimpleBench | 23% | — |
| Kagi LLM Benchmark | 45% | — |
| NYT Connections (extended) | — | 6.5% |
| Thematic Generalization | — | 20.3% |
| LMArena Hard Prompts | 1269 | — |
| DTBench | 61.4% | — |
| BIG-Bench Hard | 82.9% | — |
| Epoch Capabilities Index | 128.75 | — |
| ForecastBench | 59.9 | — |
| HellaSwag | 89.2% | — |
| PIQA | 85.9% | — |
| WinoGrande | 89.2% | — |

## Math

- Llama 3.1-405B: 18.4 (#290)
- Mistral Medium 3.1: —

| Benchmark | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 9.7% | — |
| Omni-MATH | 24.9% | — |
| LMArena Math | 1281 | — |
| MATH Level 5 | 49.8% | — |

## Knowledge

- Llama 3.1-405B: 30.4 (#227)
- Mistral Medium 3.1: —

| Benchmark | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| GPQA Diamond | 50.9% | — |
| MMLU-Pro | 72.3% | — |
| Confabulations | 17.6% | — |
| GPQA (HELM) | 52.2% | — |
| LMArena Expert | 1243 | — |
| ARC (AI2) Challenge | 95.3% | — |
| MMLU | 84.5% | — |
| TriviaQA | 82.7% | — |

## Multilingual

- Llama 3.1-405B: 40.7 (#214)
- Mistral Medium 3.1: —

| Benchmark | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| LMArena Non-English | 1248 | — |
| LMArena Chinese | 1242 | — |
| LMArena French | 1279 | — |
| LMArena German | 1252 | — |
| LMArena Japanese | 1208 | — |
| LMArena Korean | 1184 | — |
| LMArena Russian | 1265 | — |
| LMArena Spanish | 1260 | — |

## Instruction Following

- Llama 3.1-405B: 65.9 (#214)
- Mistral Medium 3.1: —

| Benchmark | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| IFEval | 81.1% | — |
| LMArena Instruction Following | 1259 | — |

## Long Context

- Llama 3.1-405B: 38.4 (#197)
- Mistral Medium 3.1: —

| Benchmark | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| LMArena Longer Query | 1266 | — |

## Writing & Preference

- Llama 3.1-405B: 38.9 (#251)
- Mistral Medium 3.1: 55.5 (#145)

| Benchmark | Llama 3.1-405B | Mistral Medium 3.1 |
|---|---|---|
| EQ-Bench Creative Writing | 870 | 1476 |
| LMArena Text | 1284 | — |
| LMArena Creative Writing | 1262 | — |
| WildBench | 78.3% | — |
| LMArena Multi-Turn | 1297 | — |

## FAQ

### Is Llama 3.1-405B better than Mistral Medium 3.1?

Mistral Medium 3.1 is the stronger model overall, scoring 31.9 to 30.7 on the Noometry Index.

### How many benchmarks do Llama 3.1-405B and Mistral Medium 3.1 share?

1 benchmark has published results for both models. Llama 3.1-405B has 42 scored results on Noometry and Mistral Medium 3.1 has 3.