Model comparison
Grok 2 Mini 2024 08 13 vs Grok 4 Fast
Grok 4 Fast is the stronger model overall, scoring 39.4 to 37.7 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Grok 2 Mini 2024 08 13 scores higher in 3 categories and Grok 4 Fast in 5 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 38.4.
Side by side
| Grok 2 Mini 2024 08 13 | Grok 4 Fast | |
|---|---|---|
| Provider | xAI | xAI |
| Noometry Index | 37.7 | 39.4 |
| Released | 2024-08-13 | 2025-09-19 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 17 | 30 |
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Category by category
Coding Grok 2 Mini 2024 08 13 leads
Grok 2 Mini 2024 08 13: 37.0 (#199), Grok 4 Fast: 32.5 (#271)
| Benchmark | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1269 | 1429 |
| LMArena WebDev | — | 1159 |
| WeirdML | — | 42.9% |
Agentic & Tool Use Not comparable
Grok 2 Mini 2024 08 13: —, Grok 4 Fast: 29.5 (#86)
| Benchmark | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |
Reasoning Grok 2 Mini 2024 08 13 leads
Grok 2 Mini 2024 08 13: 24.8 (#159), Grok 4 Fast: 22.2 (#201)
| Benchmark | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| LMArena Hard Prompts | 1255 | 1412 |
| ARC-AGI-2 | — | 5.3% |
| Kagi LLM Benchmark | — | 66.1% |
| ARC-AGI-1 | — | 48.5% |
| DTBench | — | 82.7% |
| Epoch Capabilities Index | — | 144.2 |
| ForecastBench | — | 60.5 |
Math Grok 4 Fast leads
Grok 2 Mini 2024 08 13: 35.4 (#185), Grok 4 Fast: 38.9 (#123)
| Benchmark | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1265 | 1419 |
Knowledge Grok 2 Mini 2024 08 13 leads
Grok 2 Mini 2024 08 13: 33.9 (#200), Grok 4 Fast: 32.0 (#214)
| Benchmark | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| LMArena Expert | 1238 | 1411 |
| Vectara Hallucination Rate | — | 19.7% |
Multilingual Grok 4 Fast leads
Grok 2 Mini 2024 08 13: 41.4 (#208), Grok 4 Fast: 51.3 (#111)
| Benchmark | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1257 | 1396 |
| LMArena Chinese | 1262 | 1457 |
| LMArena French | 1286 | 1431 |
| LMArena German | 1273 | 1383 |
| LMArena Japanese | 1213 | 1352 |
| LMArena Korean | 1195 | 1357 |
| LMArena Russian | 1261 | 1389 |
| LMArena Spanish | 1279 | 1415 |
Instruction Following Grok 4 Fast leads
Grok 2 Mini 2024 08 13: 65.5 (#220), Grok 4 Fast: 73.2 (#121)
| Benchmark | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1245 | 1387 |
Long Context Grok 4 Fast leads
Grok 2 Mini 2024 08 13: 38.4 (#196), Grok 4 Fast: 63.2 (#3)
| Benchmark | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1266 | 1415 |
| Fiction.LiveBench | — | 94.4% |
Writing & Preference Grok 4 Fast leads
Grok 2 Mini 2024 08 13: 47.3 (#211), Grok 4 Fast: 60.0 (#102)
| Benchmark | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1281 | 1407 |
| LMArena Creative Writing | 1242 | 1387 |
| LMArena Multi-Turn | 1265 | 1414 |
Frequently asked questions
Is Grok 2 Mini 2024 08 13 better than Grok 4 Fast?
Grok 4 Fast is the stronger model overall, scoring 39.4 to 37.7 on the Noometry Index.
Is Grok 2 Mini 2024 08 13 or Grok 4 Fast better for coding?
Grok 2 Mini 2024 08 13 scores higher on coding benchmarks: 37.0 versus 32.5 in the Noometry coding category.
How many benchmarks do Grok 2 Mini 2024 08 13 and Grok 4 Fast share?
17 benchmarks have published results for both models. Grok 2 Mini 2024 08 13 has 17 scored results on Noometry and Grok 4 Fast has 30.