# Grok 4.1 Fast vs Mistral Medium

> Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 36.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-1-fast-vs-mistral-medium
- Last updated: 2026-10-10
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Grok 4.1 Fast scores higher in 5 categories and Mistral Medium in 5 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 24.0.
- The biggest single-benchmark swing is Berkeley Function Calling Leaderboard: 69.6% for Grok 4.1 Fast and 37.7% for Mistral Medium.
- Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium.
- Mistral Medium accepts more context: 262K tokens versus 128K.
- Mistral Medium has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 41.4 | 36.3 |
| Rank | 136 | 218 |
| Context | 128K | 262K |
| Input $/M | $0.20 | $1.50 |
| Output $/M | $0.50 | $7.50 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.1 Fast: 34.1 (#245)
- Mistral Medium: 34.2 (#243)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| LMArena Coding | 1411 | 1434 |
| ALE-Bench | 394.93 | 763.98 |
| FrontierCode | — | 8% |
| LMArena WebDev | 1242 | — |
| SciCode | — | 40.2% |
| WeirdML | — | 43.7% |

## Agentic & Tool Use

- Grok 4.1 Fast: 36.3 (#39)
- Mistral Medium: 28.3 (#90)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| Berkeley Function Calling Leaderboard | 69.6% | 37.7% |
| τ²-bench Banking | 13.1% | — |
| LMArena Search | 1171 | — |
| Vending-Bench 2 | 1,107 | — |

## Reasoning

- Grok 4.1 Fast: 43.4 (#49)
- Mistral Medium: 24.0 (#167)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| LMArena Hard Prompts | 1407 | 1426 |
| DTBench | 87.7% | 75.5% |
| SimpleBench | 56% | — |
| Kagi LLM Benchmark | — | 50% |
| NYT Connections (extended) | 87.4% | — |
| CritPt | — | 0% |
| LMCA | — | 26.1% |
| Surface Evolver Bench | — | 26.9% |
| ForecastBench | 61 | — |

## Math

- Grok 4.1 Fast: 31.9 (#221)
- Mistral Medium: 28.1 (#245)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| ProofBench | 4% | 9% |
| LMArena Math | 1408 | 1408 |
| MathArena Final-Answer Competitions | 60.9% | — |
| OTIS Mock AIME 2024-2025 | — | 32.2% |
| MATH Level 5 | — | 81.6% |
| FrontierMath (Feb 2025 set) | — | 0.3% |

## Knowledge

- Grok 4.1 Fast: 33.1 (#207)
- Mistral Medium: 25.0 (#265)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| Vectara Hallucination Rate | 17.8% | 22.7% |
| LMArena Expert | 1399 | 1408 |
| GPQA Diamond | — | 59.5% |
| Humanity's Last Exam | — | 4.5% |

## Multimodal

- Grok 4.1 Fast: 37.0 (#76)
- Mistral Medium: 35.3 (#88)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| LMArena Vision | 1201 | 1172 |

## Multilingual

- Grok 4.1 Fast: 51.0 (#114)
- Mistral Medium: 52.1 (#91)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| LMArena Non-English | 1391 | 1408 |
| LMArena Chinese | 1441 | 1447 |
| LMArena French | 1415 | 1459 |
| LMArena German | 1404 | 1432 |
| LMArena Japanese | 1349 | 1378 |
| LMArena Korean | 1361 | 1380 |
| LMArena Russian | 1387 | 1411 |
| LMArena Spanish | 1413 | 1433 |

## Instruction Following

- Grok 4.1 Fast: 72.7 (#133)
- Mistral Medium: 73.7 (#116)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| LMArena Instruction Following | 1376 | 1398 |

## Long Context

- Grok 4.1 Fast: 42.4 (#126)
- Mistral Medium: 42.9 (#114)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| LMArena Longer Query | 1390 | 1406 |

## Writing & Preference

- Grok 4.1 Fast: 57.2 (#131)
- Mistral Medium: 60.0 (#103)

| Benchmark | Grok 4.1 Fast | Mistral Medium |
|---|---|---|
| LMArena Text | 1408 | 1424 |
| LMArena Creative Writing | 1394 | 1391 |
| LMArena Multi-Turn | 1389 | 1418 |
| Short-Story Creative Writing | — | 77.3% |
| EQ-Bench Creative Writing | 1327 | — |

## FAQ

### Is Grok 4.1 Fast better than Mistral Medium?

Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 36.3 on the Noometry Index.

### Which is cheaper, Grok 4.1 Fast or Mistral Medium?

Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; Mistral Medium lists at $1.50 and $7.50.

### Is Grok 4.1 Fast or Mistral Medium better for coding?

They score almost the same on coding (34.1 vs 34.2); test both on your own repository before choosing.

### Which has the bigger context window?

Mistral Medium does, with 262K tokens against 128K.

### How many benchmarks do Grok 4.1 Fast and Mistral Medium share?

23 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Mistral Medium has 36.