# Longcat Flash Chat vs Yi-Lightning

> Longcat Flash Chat is the stronger model overall, scoring 42.1 to 37.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/longcat-flash-chat-vs-yi-lightning
- Last updated: 2026-10-12
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Longcat Flash Chat scores higher in 7 categories and Yi-Lightning in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where Longcat Flash Chat leads 43.5 to 27.4.
- Longcat Flash Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Longcat Flash Chat | Yi-Lightning |
|---|---|---|
| Provider | Meituan | 01.AI |
| Noometry Index | 42.1 | 37.1 |
| Rank | 120 | 209 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Proprietary |

## Coding

- Longcat Flash Chat: 43.5 (#87)
- Yi-Lightning: 27.4 (#320)

| Benchmark | Longcat Flash Chat | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1471 | 1312 |
| Aider Polyglot | — | 12.9% |

## Reasoning

- Longcat Flash Chat: 19.0 (#272)
- Yi-Lightning: 25.9 (#139)

| Benchmark | Longcat Flash Chat | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1440 | 1302 |
| Kagi LLM Benchmark | 43.9% | — |
| NYT Connections (extended) | 17.7% | — |

## Math

- Longcat Flash Chat: 39.4 (#107)
- Yi-Lightning: 36.2 (#172)

| Benchmark | Longcat Flash Chat | Yi-Lightning |
|---|---|---|
| LMArena Math | 1442 | 1300 |

## Knowledge

- Longcat Flash Chat: 40.6 (#116)
- Yi-Lightning: 35.4 (#185)

| Benchmark | Longcat Flash Chat | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1454 | 1286 |

## Multilingual

- Longcat Flash Chat: 51.9 (#101)
- Yi-Lightning: 42.2 (#196)

| Benchmark | Longcat Flash Chat | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1404 | 1269 |
| LMArena Chinese | 1465 | 1320 |
| LMArena French | 1456 | 1305 |
| LMArena German | 1408 | 1267 |
| LMArena Japanese | 1373 | 1228 |
| LMArena Korean | 1371 | 1192 |
| LMArena Russian | 1395 | 1255 |
| LMArena Spanish | 1445 | 1315 |

## Instruction Following

- Longcat Flash Chat: 74.4 (#96)
- Yi-Lightning: 67.4 (#196)

| Benchmark | Longcat Flash Chat | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1411 | 1278 |

## Long Context

- Longcat Flash Chat: 43.5 (#93)
- Yi-Lightning: 39.4 (#181)

| Benchmark | Longcat Flash Chat | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1425 | 1297 |

## Writing & Preference

- Longcat Flash Chat: 61.0 (#91)
- Yi-Lightning: 50.2 (#184)

| Benchmark | Longcat Flash Chat | Yi-Lightning |
|---|---|---|
| LMArena Text | 1427 | 1302 |
| LMArena Creative Writing | 1388 | 1280 |
| LMArena Multi-Turn | 1418 | 1311 |

## FAQ

### Is Longcat Flash Chat better than Yi-Lightning?

Longcat Flash Chat is the stronger model overall, scoring 42.1 to 37.1 on the Noometry Index.

### Is Longcat Flash Chat or Yi-Lightning better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 43.5 versus 27.4 in the Noometry coding category.

### How many benchmarks do Longcat Flash Chat and Yi-Lightning share?

17 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Yi-Lightning has 18.