# Amazon Nova Experimental Chat 10 20 vs Longcat Flash Chat

> Amazon Nova Experimental Chat 10 20 and Longcat Flash Chat score almost the same on the Noometry Index (42.1 vs 42.1), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/amazon-nova-experimental-chat-10-20-vs-longcat-flash-chat
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Amazon Nova Experimental Chat 10 20 scores higher in 1 category and Longcat Flash Chat in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Amazon Nova Experimental Chat 10 20 leads 28.4 to 19.0.
- Longcat Flash Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Amazon Nova Experimental Chat 10 20 | Longcat Flash Chat |
|---|---|---|
| Provider | Amazon | Meituan |
| Noometry Index | 42.1 | 42.1 |
| Rank | 118 | 120 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Amazon Nova Experimental Chat 10 20: 41.6 (#123)
- Longcat Flash Chat: 43.5 (#87)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Longcat Flash Chat |
|---|---|---|
| LMArena Coding | 1412 | 1471 |

## Reasoning

- Amazon Nova Experimental Chat 10 20: 28.4 (#106)
- Longcat Flash Chat: 19.0 (#272)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Longcat Flash Chat |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1440 |
| Kagi LLM Benchmark | — | 43.9% |
| NYT Connections (extended) | — | 17.7% |

## Math

- Amazon Nova Experimental Chat 10 20: 39.0 (#119)
- Longcat Flash Chat: 39.4 (#107)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Longcat Flash Chat |
|---|---|---|
| LMArena Math | 1425 | 1442 |

## Knowledge

- Amazon Nova Experimental Chat 10 20: 38.5 (#144)
- Longcat Flash Chat: 40.6 (#116)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Longcat Flash Chat |
|---|---|---|
| LMArena Expert | 1386 | 1454 |

## Multilingual

- Amazon Nova Experimental Chat 10 20: 49.5 (#131)
- Longcat Flash Chat: 51.9 (#101)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Longcat Flash Chat |
|---|---|---|
| LMArena Non-English | 1372 | 1404 |
| LMArena Chinese | 1404 | 1465 |
| LMArena French | 1425 | 1456 |
| LMArena German | 1391 | 1408 |
| LMArena Japanese | 1360 | 1373 |
| LMArena Korean | 1324 | 1371 |
| LMArena Russian | 1371 | 1395 |
| LMArena Spanish | 1382 | 1445 |

## Instruction Following

- Amazon Nova Experimental Chat 10 20: 72.1 (#141)
- Longcat Flash Chat: 74.4 (#96)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Longcat Flash Chat |
|---|---|---|
| LMArena Instruction Following | 1365 | 1411 |

## Long Context

- Amazon Nova Experimental Chat 10 20: 41.7 (#133)
- Longcat Flash Chat: 43.5 (#93)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Longcat Flash Chat |
|---|---|---|
| LMArena Longer Query | 1370 | 1425 |

## Writing & Preference

- Amazon Nova Experimental Chat 10 20: 56.6 (#136)
- Longcat Flash Chat: 61.0 (#91)

| Benchmark | Amazon Nova Experimental Chat 10 20 | Longcat Flash Chat |
|---|---|---|
| LMArena Text | 1394 | 1427 |
| LMArena Creative Writing | 1318 | 1388 |
| LMArena Multi-Turn | 1364 | 1418 |

## FAQ

### Is Amazon Nova Experimental Chat 10 20 better than Longcat Flash Chat?

Amazon Nova Experimental Chat 10 20 and Longcat Flash Chat score almost the same on the Noometry Index (42.1 vs 42.1), so choose on price, context window or the category you care about most.

### Is Amazon Nova Experimental Chat 10 20 or Longcat Flash Chat better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 43.5 versus 41.6 in the Noometry coding category.

### How many benchmarks do Amazon Nova Experimental Chat 10 20 and Longcat Flash Chat share?

17 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Longcat Flash Chat has 19.