# Longcat Flash Chat vs Yi-1.5-34B

> Longcat Flash Chat is the stronger model overall, scoring 42.1 to 30.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/longcat-flash-chat-vs-yi-1-5-34b
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Longcat Flash Chat scores higher in 7 categories and Yi-1.5-34B in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Longcat Flash Chat leads 40.6 to 14.8.

## Snapshot

| | Longcat Flash Chat | Yi-1.5-34B |
|---|---|---|
| Provider | Meituan | 01.AI |
| Noometry Index | 42.1 | 30.6 |
| Rank | 120 | 289 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Open |

## Coding

- Longcat Flash Chat: 43.5 (#87)
- Yi-1.5-34B: 32.4 (#272)

| Benchmark | Longcat Flash Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1471 | 1169 |
| BigCodeBench Instruct | — | 33.9% |
| BigCodeBench Complete | — | 43.8% |

## Reasoning

- Longcat Flash Chat: 19.0 (#272)
- Yi-1.5-34B: 22.5 (#191)

| Benchmark | Longcat Flash Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1440 | 1160 |
| Kagi LLM Benchmark | 43.9% | — |
| NYT Connections (extended) | 17.7% | — |

## Math

- Longcat Flash Chat: 39.4 (#107)
- Yi-1.5-34B: 27.5 (#249)

| Benchmark | Longcat Flash Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1442 | 1182 |
| MATH Level 5 | — | 25.5% |

## Knowledge

- Longcat Flash Chat: 40.6 (#116)
- Yi-1.5-34B: 14.8 (#295)

| Benchmark | Longcat Flash Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Expert | 1454 | 1144 |
| GPQA Diamond | — | 32% |

## Multilingual

- Longcat Flash Chat: 51.9 (#101)
- Yi-1.5-34B: 32.3 (#256)

| Benchmark | Longcat Flash Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1404 | 1121 |
| LMArena Chinese | 1465 | 1213 |
| LMArena French | 1456 | 1156 |
| LMArena German | 1408 | 1111 |
| LMArena Japanese | 1373 | 1021 |
| LMArena Korean | 1371 | 1005 |
| LMArena Russian | 1395 | 1091 |
| LMArena Spanish | 1445 | 1121 |

## Instruction Following

- Longcat Flash Chat: 74.4 (#96)
- Yi-1.5-34B: 59.2 (#257)

| Benchmark | Longcat Flash Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1411 | 1139 |

## Long Context

- Longcat Flash Chat: 43.5 (#93)
- Yi-1.5-34B: 34.6 (#248)

| Benchmark | Longcat Flash Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1425 | 1143 |

## Writing & Preference

- Longcat Flash Chat: 61.0 (#91)
- Yi-1.5-34B: 37.4 (#257)

| Benchmark | Longcat Flash Chat | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1427 | 1173 |
| LMArena Creative Writing | 1388 | 1135 |
| LMArena Multi-Turn | 1418 | 1153 |

## FAQ

### Is Longcat Flash Chat better than Yi-1.5-34B?

Longcat Flash Chat is the stronger model overall, scoring 42.1 to 30.6 on the Noometry Index.

### Is Longcat Flash Chat or Yi-1.5-34B better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 43.5 versus 32.4 in the Noometry coding category.

### How many benchmarks do Longcat Flash Chat and Yi-1.5-34B share?

17 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Yi-1.5-34B has 21.