# Grok 4.1 Fast vs Mistral Small

> Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 33.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-1-fast-vs-mistral-small
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. Grok 4.1 Fast scores higher in 10 categories and Mistral Small in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 42.3 to 19.3.
- The biggest single-benchmark swing is Berkeley Function Calling Leaderboard: 69.6% for Grok 4.1 Fast and 37.1% for Mistral Small.
- Both cost about the same: $0.20 input and $0.50 output per million tokens.
- Mistral Small accepts more context: 256K tokens versus 128K.
- Mistral Small has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 40.9 | 33.1 |
| Rank | 131 | 238 |
| Context | 128K | 256K |
| Input $/M | $0.20 | $0.15 |
| Output $/M | $0.50 | $0.60 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.1 Fast: 33.8 (#236)
- Mistral Small: 33.5 (#242)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| LMArena Coding | 1411 | 1363 |
| ALE-Bench | 394.93 | 497.62 |
| LMArena WebDev | 1241 | — |
| SciCode | — | 26.5% |
| BigCodeBench Instruct | — | 36.1% |
| LiveBench Coding | — | 36.2% |
| BigCodeBench Complete | — | 46.6% |

## Agentic & Tool Use

- Grok 4.1 Fast: 36.1 (#35)
- Mistral Small: 27.9 (#87)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| Berkeley Function Calling Leaderboard | 69.6% | 37.1% |
| τ²-bench Banking | 13.1% | — |
| LMArena Search | 1171 | — |
| Vending-Bench 2 | 1,107 | — |

## Reasoning

- Grok 4.1 Fast: 42.3 (#45)
- Mistral Small: 19.3 (#238)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| LMArena Hard Prompts | 1407 | 1336 |
| DTBench | 87.7% | 70.9% |
| SimpleBench | 56% | — |
| Kagi LLM Benchmark | — | 37.8% |
| NYT Connections (extended) | 87.4% | — |
| CritPt | — | 0% |
| LiveBench Reasoning | — | 44.8% |
| LiveBench Data Analysis | — | 53.7% |
| LMCA | — | 20.6% |
| ForecastBench | 61 | — |
| LiveBench | — | 44% |

## Math

- Grok 4.1 Fast: 30.9 (#201)
- Mistral Small: 15.4 (#287)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| LMArena Math | 1408 | 1341 |
| MathArena Final-Answer Competitions | 60.9% | — |
| OTIS Mock AIME 2024-2025 | — | 5.8% |
| ProofBench | 4% | — |
| LiveBench Math | — | 39.9% |
| MATH Level 5 | — | 46.8% |

## Knowledge

- Grok 4.1 Fast: 32.6 (#203)
- Mistral Small: 30.9 (#214)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| Vectara Hallucination Rate | 17.8% | 5.1% |
| LMArena Expert | 1398 | 1293 |
| GPQA Diamond | — | 47.5% |
| MMLU | — | 68.7% |

## Multimodal

- Grok 4.1 Fast: 36.3 (#71)
- Mistral Small: 32.9 (#91)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| LMArena Vision | 1201 | 1142 |

## Multilingual

- Grok 4.1 Fast: 51.1 (#110)
- Mistral Small: 45.7 (#164)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| LMArena Non-English | 1391 | 1315 |
| LMArena Chinese | 1441 | 1342 |
| LMArena French | 1416 | 1337 |
| LMArena German | 1404 | 1341 |
| LMArena Japanese | 1347 | 1275 |
| LMArena Korean | 1361 | 1260 |
| LMArena Russian | 1387 | 1324 |
| LMArena Spanish | 1411 | 1346 |

## Instruction Following

- Grok 4.1 Fast: 72.8 (#127)
- Mistral Small: 66.6 (#204)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| LMArena Instruction Following | 1376 | 1310 |
| LiveBench Instruction Following | — | 63.7% |

## Long Context

- Grok 4.1 Fast: 42.4 (#121)
- Mistral Small: 40.4 (#151)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| LMArena Longer Query | 1390 | 1327 |

## Writing & Preference

- Grok 4.1 Fast: 57.4 (#126)
- Mistral Small: 52.6 (#165)

| Benchmark | Grok 4.1 Fast | Mistral Small |
|---|---|---|
| LMArena Text | 1408 | 1338 |
| LMArena Creative Writing | 1394 | 1304 |
| LMArena Multi-Turn | 1389 | 1344 |
| EQ-Bench Creative Writing | 1327 | — |
| LiveBench Language | — | 30.5% |

## FAQ

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

Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 33.1 on the Noometry Index.

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

Mistral Small is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Grok 4.1 Fast lists at $0.20 and $0.50.

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

They score almost the same on coding (33.8 vs 33.5); test both on your own repository before choosing.

### Which has the bigger context window?

Mistral Small does, with 256K tokens against 128K.

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

22 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Mistral Small has 39.