# Grok 4 Fast vs Olmo 7b Instruct

> Grok 4 Fast is the stronger model overall, scoring 39.0 to 29.7 on the Noometry Index.

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

## Summary

- They share 10 benchmarks with published results for both. Grok 4 Fast scores higher in 6 categories and Olmo 7b Instruct in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4 Fast leads 60.2 to 26.0.
- Olmo 7b Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| Provider | xAI | Allen Institute for AI (Ai2) |
| Noometry Index | 39.0 | 29.7 |
| Rank | 164 | 293 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Grok 4 Fast: 32.3 (#264)
- Olmo 7b Instruct: 29.1 (#298)

| Benchmark | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| LMArena Coding | 1429 | 1016 |
| LMArena WebDev | 1160 | — |
| WeirdML | 42.9% | — |

## Agentic & Tool Use

- Grok 4 Fast: 29.3 (#80)
- Olmo 7b Instruct: —

| Benchmark | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |

## Reasoning

- Grok 4 Fast: 22.5 (#179)
- Olmo 7b Instruct: 18.0 (#273)

| Benchmark | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| LMArena Hard Prompts | 1413 | 993 |
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| ARC-AGI-1 | 48.5% | — |
| DTBench | 82.7% | — |
| Epoch Capabilities Index | 144.21 | — |
| ForecastBench | 60.5 | — |

## Math

- Grok 4 Fast: 36.1 (#126)
- Olmo 7b Instruct: 27.8 (#234)

| Benchmark | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| LMArena Math | 1419 | 1018 |

## Knowledge

- Grok 4 Fast: 31.5 (#211)
- Olmo 7b Instruct: —

| Benchmark | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| Vectara Hallucination Rate | 19.7% | — |
| LMArena Expert | 1411 | — |

## Multilingual

- Grok 4 Fast: 51.5 (#106)
- Olmo 7b Instruct: 24.1 (#286)

| Benchmark | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| LMArena Non-English | 1397 | 977 |
| LMArena Chinese | 1458 | 1013 |
| LMArena Russian | 1387 | 946 |
| LMArena French | 1433 | — |
| LMArena German | 1383 | — |
| LMArena Japanese | 1358 | — |
| LMArena Korean | 1359 | — |
| LMArena Spanish | 1414 | — |

## Instruction Following

- Grok 4 Fast: 73.4 (#116)
- Olmo 7b Instruct: 49.3 (#296)

| Benchmark | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| LMArena Instruction Following | 1388 | 978 |

## Long Context

- Grok 4 Fast: 63.2 (#3)
- Olmo 7b Instruct: —

| Benchmark | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| Fiction.LiveBench | 94.4% | — |
| LMArena Longer Query | 1415 | — |

## Writing & Preference

- Grok 4 Fast: 60.2 (#96)
- Olmo 7b Instruct: 26.0 (#298)

| Benchmark | Grok 4 Fast | Olmo 7b Instruct |
|---|---|---|
| LMArena Text | 1407 | 1032 |
| LMArena Creative Writing | 1388 | 990 |
| LMArena Multi-Turn | 1414 | 1007 |

## FAQ

### Is Grok 4 Fast better than Olmo 7b Instruct?

Grok 4 Fast is the stronger model overall, scoring 39.0 to 29.7 on the Noometry Index.

### Is Grok 4 Fast or Olmo 7b Instruct better for coding?

Grok 4 Fast scores higher on coding benchmarks: 32.3 versus 29.1 in the Noometry coding category.

### How many benchmarks do Grok 4 Fast and Olmo 7b Instruct share?

10 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Olmo 7b Instruct has 10.