# Grok 4 Fast vs Mistral Large 3

> Grok 4 Fast and Mistral Large 3 score almost the same on the Noometry Index (39.4 vs 39.1), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/grok-4-fast-vs-mistral-large-3
- Last updated: 2026-10-10
- Shared benchmarks: 20

## Summary

- They share 20 benchmarks with published results for both. Grok 4 Fast scores higher in 3 categories and Mistral Large 3 in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 43.1.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 66.1% for Grok 4 Fast and 50.9% for Mistral Large 3.
- Mistral Large 3 has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 39.4 | 39.1 |
| Rank | 167 | 176 |
| Context | — | 262K |
| Input $/M | — | $0.25 |
| Output $/M | — | $0.75 |
| Weights | Proprietary | Open |

## Coding

- Grok 4 Fast: 32.5 (#271)
- Mistral Large 3: 34.4 (#237)

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| LMArena WebDev | 1159 | 1230 |
| LMArena Coding | 1429 | 1448 |
| WeirdML | 42.9% | — |

## Agentic & Tool Use

- Grok 4 Fast: 29.5 (#86)
- Mistral Large 3: —

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |

## Reasoning

- Grok 4 Fast: 22.2 (#201)
- Mistral Large 3: 15.2 (#319)

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| Kagi LLM Benchmark | 66.1% | 50.9% |
| LMArena Hard Prompts | 1412 | 1429 |
| ARC-AGI-2 | 5.3% | — |
| NYT Connections (extended) | — | 7.5% |
| ARC-AGI-1 | 48.5% | — |
| Thematic Generalization | — | 23% |
| DTBench | 82.7% | — |
| Epoch Capabilities Index | 144.2 | — |
| ForecastBench | 60.5 | — |

## Math

- Grok 4 Fast: 38.9 (#123)
- Mistral Large 3: 38.7 (#129)

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| LMArena Math | 1419 | 1414 |

## Knowledge

- Grok 4 Fast: 32.0 (#214)
- Mistral Large 3: 36.0 (#177)

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| Vectara Hallucination Rate | 19.7% | 14.5% |
| LMArena Expert | 1411 | 1421 |

## Multimodal

- Grok 4 Fast: —
- Mistral Large 3: 38.2 (#66)

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| LMArena Vision | — | 1221 |

## Multilingual

- Grok 4 Fast: 51.3 (#111)
- Mistral Large 3: 52.5 (#84)

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| LMArena Non-English | 1396 | 1413 |
| LMArena Chinese | 1457 | 1447 |
| LMArena French | 1431 | 1455 |
| LMArena German | 1383 | 1437 |
| LMArena Japanese | 1352 | 1394 |
| LMArena Korean | 1357 | 1384 |
| LMArena Russian | 1389 | 1411 |
| LMArena Spanish | 1415 | 1440 |

## Instruction Following

- Grok 4 Fast: 73.2 (#121)
- Mistral Large 3: 74.0 (#108)

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| LMArena Instruction Following | 1387 | 1403 |

## Long Context

- Grok 4 Fast: 63.2 (#3)
- Mistral Large 3: 43.1 (#105)

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| LMArena Longer Query | 1415 | 1413 |
| Fiction.LiveBench | 94.4% | — |

## Writing & Preference

- Grok 4 Fast: 60.0 (#102)
- Mistral Large 3: 60.0 (#101)

| Benchmark | Grok 4 Fast | Mistral Large 3 |
|---|---|---|
| LMArena Text | 1407 | 1428 |
| LMArena Creative Writing | 1387 | 1386 |
| LMArena Multi-Turn | 1414 | 1429 |
| EQ-Bench Creative Writing | — | 1412 |

## FAQ

### Is Grok 4 Fast better than Mistral Large 3?

Grok 4 Fast and Mistral Large 3 score almost the same on the Noometry Index (39.4 vs 39.1), so choose on price, context window or the category you care about most.

### Is Grok 4 Fast or Mistral Large 3 better for coding?

Mistral Large 3 scores higher on coding benchmarks: 34.4 versus 32.5 in the Noometry coding category.

### How many benchmarks do Grok 4 Fast and Mistral Large 3 share?

20 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Mistral Large 3 has 24.