Model comparison
Grok 4 Fast vs Mistral Medium 3.1
Grok 4 Fast is the stronger model overall, scoring 39.0 to 31.5 on the Noometry Index.
Last verified . 0 shared benchmarks.
Mistral AISummary
- The widest gap is in reasoning, where Grok 4 Fast leads 22.5 to 10.1.
Side by side
| Grok 4 Fast | Mistral Medium 3.1 | |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 39.0 | 31.5 |
| Released | 2025-09-19 | — |
| Weights | Proprietary | Proprietary |
| Context window | — | 131K |
| Max output | — | 105K |
| Input $ / M tokens | — | $0.40 |
| Output $ / M tokens | — | $2 |
| Results tracked | 30 | 3 |
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Category by category
Coding Not comparable
Grok 4 Fast: 32.3 (#264), Mistral Medium 3.1: —
| Benchmark | Grok 4 Fast | Mistral Medium 3.1 |
|---|---|---|
| LMArena WebDev | 1160 | — |
| WeirdML | 42.9% | — |
| LMArena Coding | 1429 | — |
Agentic & Tool Use Not comparable
Grok 4 Fast: 29.3 (#80), Mistral Medium 3.1: —
| Benchmark | Grok 4 Fast | Mistral Medium 3.1 |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |
Reasoning Grok 4 Fast leads
Grok 4 Fast: 22.5 (#179), Mistral Medium 3.1: 10.1 (#336)
| Benchmark | Grok 4 Fast | Mistral Medium 3.1 |
|---|---|---|
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| NYT Connections (extended) | — | 6.5% |
| ARC-AGI-1 | 48.5% | — |
| Thematic Generalization | — | 20.3% |
| LMArena Hard Prompts | 1413 | — |
| DTBench | 82.7% | — |
| Epoch Capabilities Index | 144.21 | — |
| ForecastBench | 60.5 | — |
Math Not comparable
Grok 4 Fast: 36.1 (#126), Mistral Medium 3.1: —
| Benchmark | Grok 4 Fast | Mistral Medium 3.1 |
|---|---|---|
| LMArena Math | 1419 | — |
Knowledge Not comparable
Grok 4 Fast: 31.5 (#211), Mistral Medium 3.1: —
| Benchmark | Grok 4 Fast | Mistral Medium 3.1 |
|---|---|---|
| Vectara Hallucination Rate | 19.7% | — |
| LMArena Expert | 1411 | — |
Multilingual Not comparable
Grok 4 Fast: 51.5 (#106), Mistral Medium 3.1: —
| Benchmark | Grok 4 Fast | Mistral Medium 3.1 |
|---|---|---|
| LMArena Non-English | 1397 | — |
| LMArena Chinese | 1458 | — |
| LMArena French | 1433 | — |
| LMArena German | 1383 | — |
| LMArena Japanese | 1358 | — |
| LMArena Korean | 1359 | — |
| LMArena Russian | 1387 | — |
| LMArena Spanish | 1414 | — |
Instruction Following Not comparable
Grok 4 Fast: 73.4 (#116), Mistral Medium 3.1: —
| Benchmark | Grok 4 Fast | Mistral Medium 3.1 |
|---|---|---|
| LMArena Instruction Following | 1388 | — |
Long Context Not comparable
Grok 4 Fast: 63.2 (#3), Mistral Medium 3.1: —
| Benchmark | Grok 4 Fast | Mistral Medium 3.1 |
|---|---|---|
| Fiction.LiveBench | 94.4% | — |
| LMArena Longer Query | 1415 | — |
Writing & Preference Grok 4 Fast leads
Grok 4 Fast: 60.2 (#96), Mistral Medium 3.1: 55.6 (#140)
| Benchmark | Grok 4 Fast | Mistral Medium 3.1 |
|---|---|---|
| LMArena Text | 1407 | — |
| LMArena Creative Writing | 1388 | — |
| EQ-Bench Creative Writing | — | 1476 |
| LMArena Multi-Turn | 1414 | — |
Frequently asked questions
Is Grok 4 Fast better than Mistral Medium 3.1?
Grok 4 Fast is the stronger model overall, scoring 39.0 to 31.5 on the Noometry Index.
How many benchmarks do Grok 4 Fast and Mistral Medium 3.1 share?
0 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Mistral Medium 3.1 has 3.