# Amazon Nova Experimental Chat 10 09 vs Grok 4 Fast

> Amazon Nova Experimental Chat 10 09 is the stronger model overall, scoring 41.9 to 39.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-09-vs-grok-4-fast
- Last updated: 2026-10-12
- Shared benchmarks: 9

## Summary

- They share 9 benchmarks with published results for both. Amazon Nova Experimental Chat 10 09 scores higher in 2 categories and Grok 4 Fast in 4 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 40.5.

## Snapshot

| | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 41.9 | 39.4 |
| Rank | 126 | 167 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- Amazon Nova Experimental Chat 10 09: 40.2 (#145)
- Grok 4 Fast: 32.5 (#271)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1370 | 1429 |
| LMArena WebDev | — | 1159 |
| WeirdML | — | 42.9% |

## Agentic & Tool Use

- Amazon Nova Experimental Chat 10 09: —
- Grok 4 Fast: 29.5 (#86)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |

## Reasoning

- Amazon Nova Experimental Chat 10 09: 27.3 (#120)
- Grok 4 Fast: 22.2 (#201)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Hard Prompts | 1356 | 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

- Amazon Nova Experimental Chat 10 09: —
- Grok 4 Fast: 38.9 (#123)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Math | — | 1419 |

## Knowledge

- Amazon Nova Experimental Chat 10 09: —
- Grok 4 Fast: 32.0 (#214)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | — | 19.7% |
| LMArena Expert | — | 1411 |

## Multilingual

- Amazon Nova Experimental Chat 10 09: 47.3 (#150)
- Grok 4 Fast: 51.3 (#111)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1340 | 1396 |
| LMArena Chinese | 1341 | 1457 |
| LMArena French | — | 1431 |
| LMArena German | — | 1383 |
| LMArena Japanese | — | 1352 |
| LMArena Korean | — | 1357 |
| LMArena Russian | — | 1389 |
| LMArena Spanish | — | 1415 |

## Instruction Following

- Amazon Nova Experimental Chat 10 09: 69.4 (#172)
- Grok 4 Fast: 73.2 (#121)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1315 | 1387 |

## Long Context

- Amazon Nova Experimental Chat 10 09: 40.5 (#152)
- Grok 4 Fast: 63.2 (#3)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1333 | 1415 |
| Fiction.LiveBench | — | 94.4% |

## Writing & Preference

- Amazon Nova Experimental Chat 10 09: 54.7 (#149)
- Grok 4 Fast: 60.0 (#102)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1364 | 1407 |
| LMArena Creative Writing | 1307 | 1387 |
| LMArena Multi-Turn | 1355 | 1414 |

## FAQ

### Is Amazon Nova Experimental Chat 10 09 better than Grok 4 Fast?

Amazon Nova Experimental Chat 10 09 is the stronger model overall, scoring 41.9 to 39.4 on the Noometry Index.

### Is Amazon Nova Experimental Chat 10 09 or Grok 4 Fast better for coding?

Amazon Nova Experimental Chat 10 09 scores higher on coding benchmarks: 40.2 versus 32.5 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 10 09 and Grok 4 Fast share?

9 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 09 has 9 scored results on Noometry and Grok 4 Fast has 30.