# Amazon Nova Experimental Chat 10 09 vs Step 3.5 Flash

> Amazon Nova Experimental Chat 10 09 and Step 3.5 Flash score almost the same on the Noometry Index (41.4 vs 41.7), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-09-vs-step-3-5-flash
- Last updated: 2026-10-10
- Shared benchmarks: 9

## Summary

- They share 9 benchmarks with published results for both. Amazon Nova Experimental Chat 10 09 scores higher in 1 category and Step 3.5 Flash in 5 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Amazon Nova Experimental Chat 10 09 leads 26.2 to 21.2.
- Step 3.5 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | Amazon Nova Experimental Chat 10 09 | Step 3.5 Flash |
|---|---|---|
| Provider | Amazon | StepFun |
| Noometry Index | 41.4 | 41.7 |
| Rank | 124 | 116 |
| Context | — | 256K |
| Input $/M | — | $0.10 |
| Output $/M | — | $0.30 |
| Weights | Proprietary | Open |

## Coding

- Amazon Nova Experimental Chat 10 09: 39.6 (#142)
- Step 3.5 Flash: 41.7 (#106)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1371 | 1436 |

## Reasoning

- Amazon Nova Experimental Chat 10 09: 26.2 (#122)
- Step 3.5 Flash: 21.2 (#202)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1356 | 1411 |
| NYT Connections (extended) | — | 28.4% |

## Math

- Amazon Nova Experimental Chat 10 09: —
- Step 3.5 Flash: 40.6 (#77)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 3.5 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 66.8% |
| LMArena Math | — | 1408 |

## Knowledge

- Amazon Nova Experimental Chat 10 09: —
- Step 3.5 Flash: 39.0 (#127)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | — | 1422 |

## Multilingual

- Amazon Nova Experimental Chat 10 09: 47.5 (#145)
- Step 3.5 Flash: 50.7 (#115)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1341 | 1386 |
| LMArena Chinese | 1345 | 1448 |
| LMArena French | — | 1421 |
| LMArena German | — | 1404 |
| LMArena Japanese | — | 1353 |
| LMArena Korean | — | 1350 |
| LMArena Russian | — | 1385 |
| LMArena Spanish | — | 1419 |

## Instruction Following

- Amazon Nova Experimental Chat 10 09: 69.7 (#167)
- Step 3.5 Flash: 73.3 (#119)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1316 | 1385 |

## Long Context

- Amazon Nova Experimental Chat 10 09: 40.6 (#146)
- Step 3.5 Flash: 42.8 (#112)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1334 | 1402 |

## Writing & Preference

- Amazon Nova Experimental Chat 10 09: 55.0 (#144)
- Step 3.5 Flash: 59.0 (#108)

| Benchmark | Amazon Nova Experimental Chat 10 09 | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1365 | 1403 |
| LMArena Creative Writing | 1307 | 1357 |
| LMArena Multi-Turn | 1354 | 1405 |

## FAQ

### Is Amazon Nova Experimental Chat 10 09 better than Step 3.5 Flash?

Amazon Nova Experimental Chat 10 09 and Step 3.5 Flash score almost the same on the Noometry Index (41.4 vs 41.7), so choose on price, context window or the category you care about most.

### Is Amazon Nova Experimental Chat 10 09 or Step 3.5 Flash better for coding?

Step 3.5 Flash scores higher on coding benchmarks: 41.7 versus 39.6 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 10 09 and Step 3.5 Flash share?

9 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 09 has 9 scored results on Noometry and Step 3.5 Flash has 19.