# Amazon Nova Experimental Chat 10 09 vs Step 5 Preview

> Step 5 Preview is the stronger model overall, scoring 43.8 to 41.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-09-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where Step 5 Preview leads 38.0 to 26.2.

## Snapshot

| | Amazon Nova Experimental Chat 10 09 | Step 5 Preview |
|---|---|---|
| Provider | Amazon | StepFun |
| Noometry Index | 41.4 | 43.8 |
| Rank | 124 | 78 |
| Context | — | 1.02M |
| Input $/M | — | $1 |
| Output $/M | — | $2.70 |
| Weights | Proprietary | Proprietary |

## Coding

- Amazon Nova Experimental Chat 10 09: 39.6 (#142)
- Step 5 Preview: 50.6 (#40)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |
| LMArena Coding | 1371 | — |

## Reasoning

- Amazon Nova Experimental Chat 10 09: 26.2 (#122)
- Step 5 Preview: 38.0 (#58)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 5 Preview |
|---|---|---|
| CritPt | — | 20.9% |
| LMArena Hard Prompts | 1356 | — |

## Multilingual

- Amazon Nova Experimental Chat 10 09: 47.5 (#145)
- Step 5 Preview: —

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1341 | — |
| LMArena Chinese | 1345 | — |

## Instruction Following

- Amazon Nova Experimental Chat 10 09: 69.7 (#167)
- Step 5 Preview: —

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1316 | — |

## Long Context

- Amazon Nova Experimental Chat 10 09: 40.6 (#146)
- Step 5 Preview: —

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1334 | — |

## Writing & Preference

- Amazon Nova Experimental Chat 10 09: 55.0 (#144)
- Step 5 Preview: —

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 5 Preview |
|---|---|---|
| LMArena Text | 1365 | — |
| LMArena Creative Writing | 1307 | — |
| LMArena Multi-Turn | 1354 | — |

## FAQ

### Is Amazon Nova Experimental Chat 10 09 better than Step 5 Preview?

Step 5 Preview is the stronger model overall, scoring 43.8 to 41.4 on the Noometry Index.

### Is Amazon Nova Experimental Chat 10 09 or Step 5 Preview better for coding?

Step 5 Preview scores higher on coding benchmarks: 50.6 versus 39.6 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 10 09 and Step 5 Preview share?

0 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 09 has 9 scored results on Noometry and Step 5 Preview has 3.