# Grok 4 Fast vs Llama 2-7B

> Grok 4 Fast is the stronger model overall, scoring 39.0 to 28.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-fast-vs-llama-2-7b
- Last updated: 2026-10-10
- Shared benchmarks: 16

## Summary

- They share 16 benchmarks with published results for both. Grok 4 Fast scores higher in 8 categories and Llama 2-7B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 30.4.
- Llama 2-7B has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 39.0 | 28.6 |
| Rank | 164 | 315 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Grok 4 Fast: 32.3 (#264)
- Llama 2-7B: 28.7 (#302)

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| LMArena Coding | 1429 | 1002 |
| LMArena WebDev | 1160 | — |
| WeirdML | 42.9% | — |

## Agentic & Tool Use

- Grok 4 Fast: 29.3 (#80)
- Llama 2-7B: —

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |

## Reasoning

- Grok 4 Fast: 22.5 (#179)
- Llama 2-7B: 15.1 (#309)

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| LMArena Hard Prompts | 1413 | 1009 |
| Epoch Capabilities Index | 144.21 | 98.54 |
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| ARC-AGI-1 | 48.5% | — |
| Chess Puzzles | — | 0% |
| DTBench | 82.7% | — |
| BIG-Bench Hard | — | 39.2% |
| ForecastBench | 60.5 | — |
| HellaSwag | — | 77.2% |
| LAMBADA | — | 73.3% |
| PIQA | — | 78.8% |
| WinoGrande | — | 69.2% |

## Math

- Grok 4 Fast: 36.1 (#126)
- Llama 2-7B: 28.2 (#231)

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| LMArena Math | 1419 | 1042 |
| GSM8K | — | 16.7% |

## Knowledge

- Grok 4 Fast: 31.5 (#211)
- Llama 2-7B: 27.7 (#243)

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| LMArena Expert | 1411 | 1036 |
| Vectara Hallucination Rate | 19.7% | — |
| ARC (AI2) Challenge | — | 45.9% |
| BoolQ | — | 77.9% |
| MMLU | — | 45.8% |
| OpenBookQA | — | 58.6% |
| TriviaQA | — | 73.7% |

## Multimodal

- Grok 4 Fast: —
- Llama 2-7B: —

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| ScienceQA | — | 43.1% |

## Multilingual

- Grok 4 Fast: 51.5 (#106)
- Llama 2-7B: 23.9 (#288)

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| LMArena Non-English | 1397 | 973 |
| LMArena Chinese | 1458 | 973 |
| LMArena French | 1433 | 969 |
| LMArena German | 1383 | 978 |
| LMArena Russian | 1387 | 995 |
| LMArena Spanish | 1414 | 1007 |
| LMArena Japanese | 1358 | — |
| LMArena Korean | 1359 | — |

## Instruction Following

- Grok 4 Fast: 73.4 (#116)
- Llama 2-7B: 51.0 (#293)

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| LMArena Instruction Following | 1388 | 1006 |

## Long Context

- Grok 4 Fast: 63.2 (#3)
- Llama 2-7B: 30.4 (#282)

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| LMArena Longer Query | 1415 | 999 |
| Fiction.LiveBench | 94.4% | — |

## Writing & Preference

- Grok 4 Fast: 60.2 (#96)
- Llama 2-7B: 28.1 (#293)

| Benchmark | Grok 4 Fast | Llama 2-7B |
|---|---|---|
| LMArena Text | 1407 | 1053 |
| LMArena Creative Writing | 1388 | 1033 |
| LMArena Multi-Turn | 1414 | 1029 |

## FAQ

### Is Grok 4 Fast better than Llama 2-7B?

Grok 4 Fast is the stronger model overall, scoring 39.0 to 28.6 on the Noometry Index.

### Is Grok 4 Fast or Llama 2-7B better for coding?

Grok 4 Fast scores higher on coding benchmarks: 32.3 versus 28.7 in the Noometry coding category.

### How many benchmarks do Grok 4 Fast and Llama 2-7B share?

16 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Llama 2-7B has 29.