Model comparison
Grok 4 Fast vs Pixtral Large
Grok 4 Fast is the stronger model overall, scoring 39.4 to 32.2 on the Noometry Index.
Last verified . 0 shared benchmarks.
Mistral AISummary
- The widest gap is in writing & preference, where Grok 4 Fast leads 60.0 to 32.9.
- Pixtral Large has downloadable open weights; the other is API-only.
Side by side
| Grok 4 Fast | Pixtral Large | |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 39.4 | 32.2 |
| Released | 2025-09-19 | 2024-11-01 |
| Weights | Proprietary | Open |
| Context window | — | 128K |
| Max output | — | 128K |
| Input $ / M tokens | — | $2 |
| Output $ / M tokens | — | $6 |
| Results tracked | 30 | 3 |
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Category by category
Coding Not comparable
Grok 4 Fast: 32.5 (#271), Pixtral Large: —
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| LMArena WebDev | 1159 | — |
| WeirdML | 42.9% | — |
| LMArena Coding | 1429 | — |
Agentic & Tool Use Not comparable
Grok 4 Fast: 29.5 (#86), Pixtral Large: —
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |
Reasoning Too close to call
Grok 4 Fast: 22.2 (#201), Pixtral Large: 21.7 (#218)
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| ARC-AGI-1 | 48.5% | — |
| EnigmaEval | — | 0.8% |
| LMArena Hard Prompts | 1412 | — |
| DTBench | 82.7% | — |
| Epoch Capabilities Index | 144.2 | — |
| ForecastBench | 60.5 | — |
Math Not comparable
Grok 4 Fast: 38.9 (#123), Pixtral Large: —
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| LMArena Math | 1419 | — |
Knowledge Not comparable
Grok 4 Fast: 32.0 (#214), Pixtral Large: —
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| Vectara Hallucination Rate | 19.7% | — |
| LMArena Expert | 1411 | — |
Multimodal Not comparable
Grok 4 Fast: —, Pixtral Large: 30.6 (#111)
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| LMArena Vision | — | 1089 |
Multilingual Not comparable
Grok 4 Fast: 51.3 (#111), Pixtral Large: —
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| LMArena Non-English | 1396 | — |
| LMArena Chinese | 1457 | — |
| LMArena French | 1431 | — |
| LMArena German | 1383 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1357 | — |
| LMArena Russian | 1389 | — |
| LMArena Spanish | 1415 | — |
Instruction Following Not comparable
Grok 4 Fast: 73.2 (#121), Pixtral Large: —
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| LMArena Instruction Following | 1387 | — |
Long Context Not comparable
Grok 4 Fast: 63.2 (#3), Pixtral Large: —
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| Fiction.LiveBench | 94.4% | — |
| LMArena Longer Query | 1415 | — |
Writing & Preference Grok 4 Fast leads
Grok 4 Fast: 60.0 (#102), Pixtral Large: 32.9 (#278)
| Benchmark | Grok 4 Fast | Pixtral Large |
|---|---|---|
| LMArena Text | 1407 | — |
| LMArena Creative Writing | 1387 | — |
| EQ-Bench Creative Writing | — | 988 |
| LMArena Multi-Turn | 1414 | — |
Frequently asked questions
Is Grok 4 Fast better than Pixtral Large?
Grok 4 Fast is the stronger model overall, scoring 39.4 to 32.2 on the Noometry Index.
How many benchmarks do Grok 4 Fast and Pixtral Large share?
0 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Pixtral Large has 3.