# Amazon Nova Experimental Chat 10 09 vs DeepSeek V4.1 Flash

> DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 41.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-09-vs-deepseek-v4-1-flash
- 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 0 categories and DeepSeek V4.1 Flash in 6 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where DeepSeek V4.1 Flash leads 50.2 to 27.3.
- DeepSeek V4.1 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| Provider | Amazon | DeepSeek |
| Noometry Index | 41.9 | 52.8 |
| Rank | 126 | 38 |
| Context | — | 1M |
| Input $/M | — | $0.15 |
| Output $/M | — | $0.60 |
| Weights | Proprietary | Open |

## Coding

- Amazon Nova Experimental Chat 10 09: 40.2 (#145)
- DeepSeek V4.1 Flash: 52.9 (#32)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| LMArena Coding | 1370 | 1506 |
| LMArena WebDev | — | 1619 |
| SciCode | — | 51.9% |
| ALE-Bench | — | 1,092 |

## Agentic & Tool Use

- Amazon Nova Experimental Chat 10 09: —
- DeepSeek V4.1 Flash: 31.2 (#69)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| APEX-Agents | — | 39.5% |
| GDP.pdf | — | 19.8% |

## Reasoning

- Amazon Nova Experimental Chat 10 09: 27.3 (#120)
- DeepSeek V4.1 Flash: 50.2 (#36)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| LMArena Hard Prompts | 1356 | 1483 |
| NYT Connections (extended) | — | 89.6% |
| CritPt | — | 14.3% |
| Mystery Game Puzzles | — | 43% |
| DTBench | — | 89.9% |
| LMCA | — | 47% |
| Surface Evolver Bench | — | 46.3% |
| Epoch Capabilities Index | — | 154.9 |

## Math

- Amazon Nova Experimental Chat 10 09: —
- DeepSeek V4.1 Flash: 66.7 (#25)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 67.4% |
| FrontierMath Tier 4 | — | 26.8% |
| OTIS Mock AIME 2024-2025 | — | 98.3% |
| ProofBench | — | 54% |
| LMArena Math | — | 1477 |

## Knowledge

- Amazon Nova Experimental Chat 10 09: —
- DeepSeek V4.1 Flash: 57.9 (#38)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| GPQA Diamond | — | 89.8% |
| LMArena Expert | — | 1506 |

## Multimodal

- Amazon Nova Experimental Chat 10 09: —
- DeepSeek V4.1 Flash: 39.1 (#61)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| LMArena Vision | — | 1277 |
| Furniture Assembly | — | 34.2% |

## Multilingual

- Amazon Nova Experimental Chat 10 09: 47.3 (#150)
- DeepSeek V4.1 Flash: 55.0 (#35)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| LMArena Non-English | 1340 | 1448 |
| LMArena Chinese | 1341 | 1497 |
| LMArena French | — | 1452 |
| LMArena German | — | 1484 |
| LMArena Japanese | — | 1412 |
| LMArena Korean | — | 1452 |
| LMArena Russian | — | 1471 |
| LMArena Spanish | — | 1459 |

## Instruction Following

- Amazon Nova Experimental Chat 10 09: 69.4 (#172)
- DeepSeek V4.1 Flash: 77.3 (#26)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| LMArena Instruction Following | 1315 | 1474 |

## Long Context

- Amazon Nova Experimental Chat 10 09: 40.5 (#152)
- DeepSeek V4.1 Flash: 45.2 (#47)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| LMArena Longer Query | 1333 | 1475 |

## Writing & Preference

- Amazon Nova Experimental Chat 10 09: 54.7 (#149)
- DeepSeek V4.1 Flash: 65.4 (#48)

| Benchmark | Amazon Nova Experimental Chat 10 09 | DeepSeek V4.1 Flash |
|---|---|---|
| LMArena Text | 1364 | 1462 |
| LMArena Creative Writing | 1307 | 1435 |
| LMArena Multi-Turn | 1355 | 1457 |
| EQ-Bench Creative Writing | — | 1540 |

## FAQ

### Is Amazon Nova Experimental Chat 10 09 better than DeepSeek V4.1 Flash?

DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 41.9 on the Noometry Index.

### Is Amazon Nova Experimental Chat 10 09 or DeepSeek V4.1 Flash better for coding?

DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.9 versus 40.2 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 10 09 and DeepSeek V4.1 Flash share?

9 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 09 has 9 scored results on Noometry and DeepSeek V4.1 Flash has 37.