# 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.

- Canonical page: https://noometry.com/compare/grok-2-mini-vs-grok-4-fast
- Last updated: 2026-10-12
- Shared benchmarks: 17

## 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.

## Snapshot

| | Grok 2 Mini 2024 08 13 | Grok 4 Fast |
|---|---|---|
| Provider | xAI | xAI |
| Noometry Index | 37.7 | 39.4 |
| Rank | 198 | 167 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- 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

- 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: 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 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: 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 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 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 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 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 |

## FAQ

### 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.