Model comparison
Grok 4 Fast vs Magistral Small
Grok 4 Fast is the stronger model overall, scoring 39.0 to 29.9 on the Noometry Index.
Last verified . 5 shared benchmarks.
Mistral AISummary
- They share 5 benchmarks with published results for both. Grok 4 Fast scores higher in 3 categories and Magistral Small in 1 category; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4 Fast leads 22.5 to 6.9.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 66.1% for Grok 4 Fast and 6.3% for Magistral Small.
- Magistral Small has downloadable open weights; the other is API-only.
Side by side
| Grok 4 Fast | Magistral Small | |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 39.0 | 29.9 |
| Released | 2025-09-19 | 2025-06-10 |
| Weights | Proprietary | Open |
| Context window | — | 128K |
| Max output | — | 40K |
| Input $ / M tokens | — | $0.50 |
| Output $ / M tokens | — | $1.50 |
| Results tracked | 30 | 10 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Magistral Small leads
Grok 4 Fast: 32.3 (#264), Magistral Small: 37.8 (#172)
| Benchmark | Grok 4 Fast | Magistral Small |
|---|---|---|
| LMArena WebDev | 1160 | — |
| SciCode | — | 35.2% |
| WeirdML | 42.9% | — |
| LMArena Coding | 1429 | — |
Agentic & Tool Use Not comparable
Grok 4 Fast: 29.3 (#80), Magistral Small: —
| Benchmark | Grok 4 Fast | Magistral Small |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |
Reasoning Grok 4 Fast leads
Grok 4 Fast: 22.5 (#179), Magistral Small: 6.9 (#345)
| Benchmark | Grok 4 Fast | Magistral Small |
|---|---|---|
| ARC-AGI-2 | 5.3% | 0% |
| Kagi LLM Benchmark | 66.1% | 6.3% |
| ARC-AGI-1 | 48.5% | 5% |
| DTBench | 82.7% | 61.3% |
| Epoch Capabilities Index | 144.21 | 133.19 |
| CritPt | — | 0.3% |
| Chess Puzzles | — | 3% |
| LMArena Hard Prompts | 1413 | — |
| ForecastBench | 60.5 | — |
Math Grok 4 Fast leads
Grok 4 Fast: 36.1 (#126), Magistral Small: 24.9 (#253)
| Benchmark | Grok 4 Fast | Magistral Small |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 30% |
| LMArena Math | 1419 | — |
Knowledge Too close to call
Grok 4 Fast: 31.5 (#211), Magistral Small: 30.9 (#215)
| Benchmark | Grok 4 Fast | Magistral Small |
|---|---|---|
| GPQA Diamond | — | 56.1% |
| Vectara Hallucination Rate | 19.7% | — |
| LMArena Expert | 1411 | — |
Multilingual Not comparable
Grok 4 Fast: 51.5 (#106), Magistral Small: —
| Benchmark | Grok 4 Fast | Magistral Small |
|---|---|---|
| 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), Magistral Small: —
| Benchmark | Grok 4 Fast | Magistral Small |
|---|---|---|
| LMArena Instruction Following | 1388 | — |
Long Context Not comparable
Grok 4 Fast: 63.2 (#3), Magistral Small: —
| Benchmark | Grok 4 Fast | Magistral Small |
|---|---|---|
| Fiction.LiveBench | 94.4% | — |
| LMArena Longer Query | 1415 | — |
Writing & Preference Not comparable
Grok 4 Fast: 60.2 (#96), Magistral Small: —
| Benchmark | Grok 4 Fast | Magistral Small |
|---|---|---|
| LMArena Text | 1407 | — |
| LMArena Creative Writing | 1388 | — |
| LMArena Multi-Turn | 1414 | — |
Frequently asked questions
Is Grok 4 Fast better than Magistral Small?
Grok 4 Fast is the stronger model overall, scoring 39.0 to 29.9 on the Noometry Index.
Is Grok 4 Fast or Magistral Small better for coding?
Magistral Small scores higher on coding benchmarks: 37.8 versus 32.3 in the Noometry coding category.
How many benchmarks do Grok 4 Fast and Magistral Small share?
5 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Magistral Small has 10.