# Amazon Nova Experimental Chat 10 20 vs Hy4 preview

> Hy4 preview is the stronger model overall, scoring 44.6 to 41.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-20-vs-hy4-preview
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Hy4 preview leads 54.5 to 36.2.
- Hy4 preview has downloadable open weights; the other is API-only.

## Snapshot

| | Amazon Nova Experimental Chat 10 20 | Hy4 preview |
|---|---|---|
| Provider | Amazon | Tencent |
| Noometry Index | 41.5 | 44.6 |
| Rank | 122 | 73 |
| Context | — | 1.05M |
| Input $/M | — | $0.83 |
| Output $/M | — | $2.50 |
| Weights | Proprietary | Open |

## Coding

- Amazon Nova Experimental Chat 10 20: 41.0 (#123)
- Hy4 preview: 51.4 (#36)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Hy4 preview |
|---|---|---|
| LMArena WebDev | — | 1633 |
| LMArena Coding | 1413 | — |

## Reasoning

- Amazon Nova Experimental Chat 10 20: 27.3 (#110)
- Hy4 preview: 30.6 (#75)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Hy4 preview |
|---|---|---|
| NYT Connections (extended) | — | 68.2% |
| LMArena Hard Prompts | 1396 | — |

## Math

- Amazon Nova Experimental Chat 10 20: 36.2 (#121)
- Hy4 preview: 54.5 (#37)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Hy4 preview |
|---|---|---|
| ProofBench | — | 75% |
| LMArena Math | 1425 | — |

## Knowledge

- Amazon Nova Experimental Chat 10 20: 37.8 (#142)
- Hy4 preview: —

| Benchmark | Amazon Nova Experimental Chat 10 20 | Hy4 preview |
|---|---|---|
| LMArena Expert | 1385 | — |

## Multilingual

- Amazon Nova Experimental Chat 10 20: 49.7 (#127)
- Hy4 preview: —

| Benchmark | Amazon Nova Experimental Chat 10 20 | Hy4 preview |
|---|---|---|
| LMArena Non-English | 1372 | — |
| LMArena Chinese | 1405 | — |
| LMArena French | 1426 | — |
| LMArena German | 1391 | — |
| LMArena Japanese | 1355 | — |
| LMArena Korean | 1327 | — |
| LMArena Russian | 1371 | — |
| LMArena Spanish | 1381 | — |

## Instruction Following

- Amazon Nova Experimental Chat 10 20: 72.3 (#136)
- Hy4 preview: —

| Benchmark | Amazon Nova Experimental Chat 10 20 | Hy4 preview |
|---|---|---|
| LMArena Instruction Following | 1365 | — |

## Long Context

- Amazon Nova Experimental Chat 10 20: 41.7 (#128)
- Hy4 preview: —

| Benchmark | Amazon Nova Experimental Chat 10 20 | Hy4 preview |
|---|---|---|
| LMArena Longer Query | 1370 | — |

## Writing & Preference

- Amazon Nova Experimental Chat 10 20: 56.9 (#131)
- Hy4 preview: —

| Benchmark | Amazon Nova Experimental Chat 10 20 | Hy4 preview |
|---|---|---|
| LMArena Text | 1394 | — |
| LMArena Creative Writing | 1318 | — |
| LMArena Multi-Turn | 1364 | — |

## FAQ

### Is Amazon Nova Experimental Chat 10 20 better than Hy4 preview?

Hy4 preview is the stronger model overall, scoring 44.6 to 41.5 on the Noometry Index.

### Is Amazon Nova Experimental Chat 10 20 or Hy4 preview better for coding?

Hy4 preview scores higher on coding benchmarks: 51.4 versus 41.0 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 10 20 and Hy4 preview share?

0 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Hy4 preview has 3.