# Grok 4.7 vs Grok 4 Fast

> Grok 4.7 is the stronger model overall, scoring 46.6 to 39.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-7-vs-grok-4-fast
- Last updated: 2026-10-10
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. Grok 4.7 scores higher in 6 categories and Grok 4 Fast in 2 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in coding, where Grok 4.7 leads 55.0 to 32.3.

## Snapshot

| | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| Provider | xAI | xAI |
| Noometry Index | 46.6 | 39.0 |
| Rank | 56 | 164 |
| Context | 500K | — |
| Input $/M | $2 | — |
| Output $/M | $6 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4.7: 55.0 (#23)
- Grok 4 Fast: 32.3 (#264)

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena WebDev | 1636 | 1160 |
| LMArena Coding | 1423 | 1429 |
| CursorBench | 46.3% | — |
| FrontierSWE | 29.5% | — |
| SciCode | 57.4% | — |
| WeirdML | — | 42.9% |

## Agentic & Tool Use

- Grok 4.7: —
- Grok 4 Fast: 29.3 (#80)

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |

## Reasoning

- Grok 4.7: 40.1 (#49)
- Grok 4 Fast: 22.5 (#179)

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Hard Prompts | 1409 | 1413 |
| ARC-AGI-2 | — | 5.3% |
| Kagi LLM Benchmark | — | 66.1% |
| NYT Connections (extended) | 76.8% | — |
| ARC-AGI-1 | — | 48.5% |
| CritPt | 17.7% | — |
| DTBench | — | 82.7% |
| Epoch Capabilities Index | — | 144.21 |
| ForecastBench | — | 60.5 |

## Math

- Grok 4.7: 41.1 (#73)
- Grok 4 Fast: 36.1 (#126)

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1393 | 1419 |
| ProofBench | 34% | — |

## Knowledge

- Grok 4.7: 38.7 (#130)
- Grok 4 Fast: 31.5 (#211)

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Expert | 1413 | 1411 |
| Vectara Hallucination Rate | — | 19.7% |

## Multimodal

- Grok 4.7: 28.8 (#107)
- Grok 4 Fast: —

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| Furniture Assembly | 20.8% | — |

## Multilingual

- Grok 4.7: 51.2 (#108)
- Grok 4 Fast: 51.5 (#106)

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1392 | 1397 |
| LMArena Chinese | 1476 | 1458 |
| LMArena Russian | 1396 | 1387 |
| LMArena French | — | 1433 |
| LMArena German | — | 1383 |
| LMArena Japanese | — | 1358 |
| LMArena Korean | — | 1359 |
| LMArena Spanish | — | 1414 |

## Instruction Following

- Grok 4.7: 74.3 (#98)
- Grok 4 Fast: 73.4 (#116)

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1406 | 1388 |

## Long Context

- Grok 4.7: 43.2 (#97)
- Grok 4 Fast: 63.2 (#3)

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1416 | 1415 |
| Fiction.LiveBench | — | 94.4% |

## Writing & Preference

- Grok 4.7: 70.1 (#23)
- Grok 4 Fast: 60.2 (#96)

| Benchmark | Grok 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1397 | 1407 |
| LMArena Creative Writing | 1391 | 1388 |
| LMArena Multi-Turn | 1389 | 1414 |
| EQ-Bench Creative Writing | 2007 | — |

## FAQ

### Is Grok 4.7 better than Grok 4 Fast?

Grok 4.7 is the stronger model overall, scoring 46.6 to 39.0 on the Noometry Index.

### Is Grok 4.7 or Grok 4 Fast better for coding?

Grok 4.7 scores higher on coding benchmarks: 55.0 versus 32.3 in the Noometry coding category.

### How many benchmarks do Grok 4.7 and Grok 4 Fast share?

13 benchmarks have published results for both models. Grok 4.7 has 21 scored results on Noometry and Grok 4 Fast has 30.