# Amazon Nova Experimental Chat 10 20 vs Grok 4.20 Multi-Agent

> Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 42.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-20-vs-grok-4-20-multi-agent
- Last updated: 2026-10-12
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Amazon Nova Experimental Chat 10 20 scores higher in 0 categories and Grok 4.20 Multi-Agent in 8 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 43.9 to 28.4.

## Snapshot

| | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 42.1 | 46.2 |
| Rank | 118 | 65 |
| Context | — | 1M |
| Input $/M | — | $1.25 |
| Output $/M | — | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Amazon Nova Experimental Chat 10 20: 41.6 (#123)
- Grok 4.20 Multi-Agent: 43.0 (#92)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Coding | 1412 | 1457 |

## Agentic & Tool Use

- Amazon Nova Experimental Chat 10 20: —
- Grok 4.20 Multi-Agent: —

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Search | — | 1204 |

## Reasoning

- Amazon Nova Experimental Chat 10 20: 28.4 (#106)
- Grok 4.20 Multi-Agent: 43.9 (#48)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1448 |
| NYT Connections (extended) | — | 89.6% |

## Math

- Amazon Nova Experimental Chat 10 20: 39.0 (#119)
- Grok 4.20 Multi-Agent: 39.4 (#104)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Math | 1425 | 1442 |

## Knowledge

- Amazon Nova Experimental Chat 10 20: 38.5 (#144)
- Grok 4.20 Multi-Agent: 40.4 (#119)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Expert | 1386 | 1445 |

## Multimodal

- Amazon Nova Experimental Chat 10 20: —
- Grok 4.20 Multi-Agent: 40.5 (#48)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Vision | — | 1259 |

## Multilingual

- Amazon Nova Experimental Chat 10 20: 49.5 (#131)
- Grok 4.20 Multi-Agent: 54.4 (#43)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Non-English | 1372 | 1440 |
| LMArena Chinese | 1404 | 1475 |
| LMArena French | 1425 | 1466 |
| LMArena German | 1391 | 1456 |
| LMArena Japanese | 1360 | 1405 |
| LMArena Korean | 1324 | 1416 |
| LMArena Russian | 1371 | 1457 |
| LMArena Spanish | 1382 | 1447 |

## Instruction Following

- Amazon Nova Experimental Chat 10 20: 72.1 (#141)
- Grok 4.20 Multi-Agent: 74.8 (#84)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Instruction Following | 1365 | 1420 |

## Long Context

- Amazon Nova Experimental Chat 10 20: 41.7 (#133)
- Grok 4.20 Multi-Agent: 43.7 (#88)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Longer Query | 1370 | 1431 |

## Writing & Preference

- Amazon Nova Experimental Chat 10 20: 56.6 (#136)
- Grok 4.20 Multi-Agent: 64.0 (#59)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Text | 1394 | 1450 |
| LMArena Creative Writing | 1318 | 1436 |
| LMArena Multi-Turn | 1364 | 1452 |

## FAQ

### Is Amazon Nova Experimental Chat 10 20 better than Grok 4.20 Multi-Agent?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 42.1 on the Noometry Index.

### Is Amazon Nova Experimental Chat 10 20 or Grok 4.20 Multi-Agent better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 43.0 versus 41.6 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 10 20 and Grok 4.20 Multi-Agent share?

17 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Grok 4.20 Multi-Agent has 20.