Model comparison
Grok 4 Fast vs Magistral Medium
Grok 4 Fast is the stronger model overall, scoring 39.0 to 34.8 on the Noometry Index.
Last verified . 20 shared benchmarks.
Mistral AISummary
- They share 20 benchmarks with published results for both. Grok 4 Fast scores higher in 6 categories and Magistral Medium in 2 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 39.3.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 66.1% for Grok 4 Fast and 16.2% for Magistral Medium.
- Magistral Medium has downloadable open weights; the other is API-only.
Side by side
| Grok 4 Fast | Magistral Medium | |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 39.0 | 34.8 |
| Released | 2025-09-19 | 2025-03-17 |
| Weights | Proprietary | Open |
| Context window | — | 128K |
| Max output | — | 16K |
| Input $ / M tokens | — | $2 |
| Output $ / M tokens | — | $5 |
| Results tracked | 30 | 22 |
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Category by category
Coding Magistral Medium leads
Grok 4 Fast: 32.3 (#264), Magistral Medium: 38.6 (#161)
| Benchmark | Grok 4 Fast | Magistral Medium |
|---|---|---|
| LMArena Coding | 1429 | 1319 |
| LMArena WebDev | 1160 | — |
| SciCode | — | 39.2% |
| WeirdML | 42.9% | — |
Agentic & Tool Use Not comparable
Grok 4 Fast: 29.3 (#80), Magistral Medium: —
| Benchmark | Grok 4 Fast | Magistral Medium |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |
Reasoning Grok 4 Fast leads
Grok 4 Fast: 22.5 (#179), Magistral Medium: 8.7 (#342)
| Benchmark | Grok 4 Fast | Magistral Medium |
|---|---|---|
| ARC-AGI-2 | 5.3% | 0% |
| Kagi LLM Benchmark | 66.1% | 16.2% |
| ARC-AGI-1 | 48.5% | 6.1% |
| LMArena Hard Prompts | 1413 | 1267 |
| CritPt | — | 0.3% |
| DTBench | 82.7% | — |
| Epoch Capabilities Index | 144.21 | — |
| ForecastBench | 60.5 | — |
Math Grok 4 Fast leads
Grok 4 Fast: 36.1 (#126), Magistral Medium: 32.4 (#187)
| Benchmark | Grok 4 Fast | Magistral Medium |
|---|---|---|
| LMArena Math | 1419 | 1249 |
Knowledge Magistral Medium leads
Grok 4 Fast: 31.5 (#211), Magistral Medium: 32.9 (#199)
| Benchmark | Grok 4 Fast | Magistral Medium |
|---|---|---|
| LMArena Expert | 1411 | 1222 |
| Vectara Hallucination Rate | 19.7% | — |
Multilingual Grok 4 Fast leads
Grok 4 Fast: 51.5 (#106), Magistral Medium: 39.8 (#219)
| Benchmark | Grok 4 Fast | Magistral Medium |
|---|---|---|
| LMArena Non-English | 1397 | 1232 |
| LMArena Chinese | 1458 | 1225 |
| LMArena French | 1433 | 1268 |
| LMArena German | 1383 | 1248 |
| LMArena Japanese | 1358 | 1176 |
| LMArena Korean | 1359 | 1125 |
| LMArena Russian | 1387 | 1224 |
| LMArena Spanish | 1414 | 1269 |
Instruction Following Grok 4 Fast leads
Grok 4 Fast: 73.4 (#116), Magistral Medium: 66.2 (#207)
| Benchmark | Grok 4 Fast | Magistral Medium |
|---|---|---|
| LMArena Instruction Following | 1388 | 1254 |
Long Context Grok 4 Fast leads
Grok 4 Fast: 63.2 (#3), Magistral Medium: 39.3 (#178)
| Benchmark | Grok 4 Fast | Magistral Medium |
|---|---|---|
| LMArena Longer Query | 1415 | 1295 |
| Fiction.LiveBench | 94.4% | — |
Writing & Preference Grok 4 Fast leads
Grok 4 Fast: 60.2 (#96), Magistral Medium: 46.5 (#214)
| Benchmark | Grok 4 Fast | Magistral Medium |
|---|---|---|
| LMArena Text | 1407 | 1255 |
| LMArena Creative Writing | 1388 | 1245 |
| LMArena Multi-Turn | 1414 | 1275 |
Frequently asked questions
Is Grok 4 Fast better than Magistral Medium?
Grok 4 Fast is the stronger model overall, scoring 39.0 to 34.8 on the Noometry Index.
Is Grok 4 Fast or Magistral Medium better for coding?
Magistral Medium scores higher on coding benchmarks: 38.6 versus 32.3 in the Noometry coding category.
How many benchmarks do Grok 4 Fast and Magistral Medium share?
20 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Magistral Medium has 22.