# Grok-3 mini vs Mistral Medium 3.5

> Grok-3 mini is the stronger model overall, scoring 41.2 to 40.2 on the Noometry Index.

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

## Summary

- They share 18 benchmarks with published results for both. Grok-3 mini scores higher in 4 categories and Mistral Medium 3.5 in 4 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok-3 mini leads 46.4 to 40.0.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 61.3% for Grok-3 mini and 41.4% for Mistral Medium 3.5.
- Mistral Medium 3.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 41.2 | 40.2 |
| Rank | 141 | 152 |
| Context | — | 262K |
| Input $/M | — | $1.50 |
| Output $/M | — | $7.50 |
| Weights | Proprietary | Open |

## Coding

- Grok-3 mini: 40.8 (#131)
- Mistral Medium 3.5: 36.0 (#213)

| Benchmark | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| LMArena Coding | 1379 | 1461 |
| Aider Polyglot | 49.3% | — |
| LMArena WebDev | — | 1264 |
| WeirdML | 42.6% | — |

## Reasoning

- Grok-3 mini: 13.6 (#334)
- Mistral Medium 3.5: 17.3 (#295)

| Benchmark | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| Kagi LLM Benchmark | 61.3% | 41.4% |
| LMArena Hard Prompts | 1375 | 1436 |
| Epoch Capabilities Index | 140.35 | 141.35 |
| ARC-AGI-2 | 0.4% | — |
| NYT Connections (extended) | — | 12.9% |
| ARC-AGI-1 | 16.5% | — |

## Math

- Grok-3 mini: 42.1 (#85)
- Mistral Medium 3.5: 39.1 (#113)

| Benchmark | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| LMArena Math | 1386 | 1431 |
| OTIS Mock AIME 2024-2025 | 77.8% | — |
| Omni-MATH | 31.8% | — |
| MATH Level 5 | 90.9% | — |
| FrontierMath (Feb 2025 set) | 5.9% | — |

## Knowledge

- Grok-3 mini: 46.4 (#81)
- Mistral Medium 3.5: 40.0 (#126)

| Benchmark | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| LMArena Expert | 1395 | 1432 |
| GPQA Diamond | 76.3% | — |
| MMLU-Pro | 79.9% | — |
| Confabulations | 10.8% | — |
| GPQA (HELM) | 67.5% | — |

## Multimodal

- Grok-3 mini: —
- Mistral Medium 3.5: 38.3 (#65)

| Benchmark | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| LMArena Vision | — | 1223 |

## Multilingual

- Grok-3 mini: 48.1 (#145)
- Mistral Medium 3.5: 51.9 (#100)

| Benchmark | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| LMArena Non-English | 1352 | 1404 |
| LMArena Chinese | 1387 | 1442 |
| LMArena French | 1357 | 1448 |
| LMArena German | 1349 | 1451 |
| LMArena Korean | 1335 | 1385 |
| LMArena Russian | 1353 | 1395 |
| LMArena Spanish | 1381 | 1409 |
| LMArena Japanese | 1342 | — |

## Instruction Following

- Grok-3 mini: 78.5 (#9)
- Mistral Medium 3.5: 74.6 (#90)

| Benchmark | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| LMArena Instruction Following | 1357 | 1415 |
| IFEval | 95.1% | — |

## Long Context

- Grok-3 mini: 41.0 (#147)
- Mistral Medium 3.5: 43.2 (#103)

| Benchmark | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| LMArena Longer Query | 1372 | 1415 |
| Fiction.LiveBench | 66.7% | — |

## Writing & Preference

- Grok-3 mini: 52.5 (#169)
- Mistral Medium 3.5: 58.5 (#117)

| Benchmark | Grok-3 mini | Mistral Medium 3.5 |
|---|---|---|
| LMArena Text | 1370 | 1421 |
| LMArena Creative Writing | 1342 | 1374 |
| LMArena Multi-Turn | 1355 | 1423 |
| Short-Story Creative Writing | 73.5% | — |
| WildBench | 65.1% | — |
| EQ-Bench 4 | — | 993 |

## FAQ

### Is Grok-3 mini better than Mistral Medium 3.5?

Grok-3 mini is the stronger model overall, scoring 41.2 to 40.2 on the Noometry Index.

### Is Grok-3 mini or Mistral Medium 3.5 better for coding?

Grok-3 mini scores higher on coding benchmarks: 40.8 versus 36.0 in the Noometry coding category.

### How many benchmarks do Grok-3 mini and Mistral Medium 3.5 share?

18 benchmarks have published results for both models. Grok-3 mini has 35 scored results on Noometry and Mistral Medium 3.5 has 22.