Model comparison
Grok 4 Fast vs Ministral 8B
Grok 4 Fast is the stronger model overall, scoring 39.4 to 28.2 on the Noometry Index.
Last verified . 14 shared benchmarks.
Mistral AISummary
- They share 14 benchmarks with published results for both. Grok 4 Fast scores higher in 8 categories and Ministral 8B in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 36.7.
- The biggest single-benchmark swing is DTBench: 82.7% for Grok 4 Fast and 45.7% for Ministral 8B.
- Ministral 8B has downloadable open weights; the other is API-only.
Side by side
| Grok 4 Fast | Ministral 8B | |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 39.4 | 28.2 |
| Released | 2025-09-19 | 2024-10-01 |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 262K |
| Input $ / M tokens | — | $0.15 |
| Output $ / M tokens | — | $0.15 |
| Results tracked | 30 | 17 |
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Category by category
Coding Ministral 8B leads
Grok 4 Fast: 32.5 (#271), Ministral 8B: 35.0 (#230)
| Benchmark | Grok 4 Fast | Ministral 8B |
|---|---|---|
| LMArena Coding | 1429 | 1202 |
| LMArena WebDev | 1159 | — |
| WeirdML | 42.9% | — |
Agentic & Tool Use Grok 4 Fast leads
Grok 4 Fast: 29.5 (#86), Ministral 8B: 16.4 (#148)
| Benchmark | Grok 4 Fast | Ministral 8B |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 11.1% |
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |
Reasoning Grok 4 Fast leads
Grok 4 Fast: 22.2 (#201), Ministral 8B: 18.4 (#281)
| Benchmark | Grok 4 Fast | Ministral 8B |
|---|---|---|
| LMArena Hard Prompts | 1412 | 1191 |
| DTBench | 82.7% | 45.7% |
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| ARC-AGI-1 | 48.5% | — |
| Epoch Capabilities Index | 144.2 | — |
| ForecastBench | 60.5 | — |
Math Grok 4 Fast leads
Grok 4 Fast: 38.9 (#123), Ministral 8B: 25.7 (#267)
| Benchmark | Grok 4 Fast | Ministral 8B |
|---|---|---|
| LMArena Math | 1419 | 1188 |
| MATH Level 5 | — | 14.9% |
Knowledge Grok 4 Fast leads
Grok 4 Fast: 32.0 (#214), Ministral 8B: 12.6 (#297)
| Benchmark | Grok 4 Fast | Ministral 8B |
|---|---|---|
| Vectara Hallucination Rate | 19.7% | 7.4% |
| LMArena Expert | 1411 | 1170 |
| GPQA Diamond | — | 27.1% |
Multilingual Grok 4 Fast leads
Grok 4 Fast: 51.3 (#111), Ministral 8B: 35.1 (#247)
| Benchmark | Grok 4 Fast | Ministral 8B |
|---|---|---|
| LMArena Non-English | 1396 | 1165 |
| LMArena Chinese | 1457 | 1193 |
| LMArena Russian | 1389 | 1195 |
| LMArena French | 1431 | — |
| LMArena German | 1383 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1357 | — |
| LMArena Spanish | 1415 | — |
Instruction Following Grok 4 Fast leads
Grok 4 Fast: 73.2 (#121), Ministral 8B: 60.5 (#250)
| Benchmark | Grok 4 Fast | Ministral 8B |
|---|---|---|
| LMArena Instruction Following | 1387 | 1161 |
Long Context Grok 4 Fast leads
Grok 4 Fast: 63.2 (#3), Ministral 8B: 36.7 (#227)
| Benchmark | Grok 4 Fast | Ministral 8B |
|---|---|---|
| LMArena Longer Query | 1415 | 1212 |
| Fiction.LiveBench | 94.4% | — |
Writing & Preference Grok 4 Fast leads
Grok 4 Fast: 60.0 (#102), Ministral 8B: 39.6 (#246)
| Benchmark | Grok 4 Fast | Ministral 8B |
|---|---|---|
| LMArena Text | 1407 | 1191 |
| LMArena Creative Writing | 1387 | 1175 |
| LMArena Multi-Turn | 1414 | 1166 |
Frequently asked questions
Is Grok 4 Fast better than Ministral 8B?
Grok 4 Fast is the stronger model overall, scoring 39.4 to 28.2 on the Noometry Index.
Is Grok 4 Fast or Ministral 8B better for coding?
Ministral 8B scores higher on coding benchmarks: 35.0 versus 32.5 in the Noometry coding category.
How many benchmarks do Grok 4 Fast and Ministral 8B share?
14 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Ministral 8B has 17.