# Longcat Flash Chat vs Qwen3.5 27B

> Longcat Flash Chat and Qwen3.5 27B score almost the same on the Noometry Index (41.5 vs 41.4), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/longcat-flash-chat-vs-qwen3-5-27b
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Longcat Flash Chat scores higher in 6 categories and Qwen3.5 27B in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Qwen3.5 27B leads 26.6 to 18.3.
- The biggest single-benchmark swing is NYT Connections (extended): 17.7% for Longcat Flash Chat and 47.9% for Qwen3.5 27B.

## Snapshot

| | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| Provider | Meituan | Alibaba (Qwen) |
| Noometry Index | 41.5 | 41.4 |
| Rank | 121 | 127 |
| Context | — | 262K |
| Input $/M | — | $0.30 |
| Output $/M | — | $2.40 |
| Weights | Open | Open |

## Coding

- Longcat Flash Chat: 42.9 (#85)
- Qwen3.5 27B: 38.6 (#159)

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| LMArena Coding | 1471 | 1427 |
| LMArena WebDev | — | 1357 |
| WeirdML | — | 39.5% |
| ALE-Bench | — | 349.45 |

## Agentic & Tool Use

- Longcat Flash Chat: —
- Qwen3.5 27B: —

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| Vending-Bench 2 | — | 201.98 |

## Reasoning

- Longcat Flash Chat: 18.3 (#267)
- Qwen3.5 27B: 26.6 (#116)

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| NYT Connections (extended) | 17.7% | 47.9% |
| LMArena Hard Prompts | 1440 | 1414 |
| Kagi LLM Benchmark | 43.9% | — |
| Thematic Generalization | — | 45.5% |
| DTBench | — | 82.4% |
| LMCA | — | 34% |

## Math

- Longcat Flash Chat: 36.6 (#107)
- Qwen3.5 27B: 36.8 (#103)

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| LMArena Math | 1441 | 1428 |
| MathArena Final-Answer Competitions | — | 56.7% |

## Knowledge

- Longcat Flash Chat: 40.0 (#111)
- Qwen3.5 27B: 37.4 (#149)

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| LMArena Expert | 1454 | 1428 |
| Vectara Hallucination Rate | — | 12.1% |

## Multimodal

- Longcat Flash Chat: —
- Qwen3.5 27B: 38.7 (#56)

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| LMArena Vision | — | 1240 |

## Multilingual

- Longcat Flash Chat: 52.1 (#95)
- Qwen3.5 27B: 51.0 (#112)

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| LMArena Non-English | 1404 | 1390 |
| LMArena Chinese | 1465 | 1478 |
| LMArena French | 1457 | 1409 |
| LMArena German | 1409 | 1393 |
| LMArena Japanese | 1373 | 1345 |
| LMArena Korean | 1372 | 1359 |
| LMArena Russian | 1396 | 1389 |
| LMArena Spanish | 1445 | 1408 |

## Instruction Following

- Longcat Flash Chat: 74.6 (#92)
- Qwen3.5 27B: 73.7 (#114)

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| LMArena Instruction Following | 1411 | 1393 |

## Long Context

- Longcat Flash Chat: 43.5 (#89)
- Qwen3.5 27B: 43.1 (#103)

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| LMArena Longer Query | 1425 | 1413 |

## Writing & Preference

- Longcat Flash Chat: 61.2 (#88)
- Qwen3.5 27B: 59.5 (#106)

| Benchmark | Longcat Flash Chat | Qwen3.5 27B |
|---|---|---|
| LMArena Text | 1427 | 1409 |
| LMArena Creative Writing | 1388 | 1362 |
| LMArena Multi-Turn | 1418 | 1410 |

## FAQ

### Is Longcat Flash Chat better than Qwen3.5 27B?

Longcat Flash Chat and Qwen3.5 27B score almost the same on the Noometry Index (41.5 vs 41.4), so choose on price, context window or the category you care about most.

### Is Longcat Flash Chat or Qwen3.5 27B better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 42.9 versus 38.6 in the Noometry coding category.

### How many benchmarks do Longcat Flash Chat and Qwen3.5 27B share?

18 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Qwen3.5 27B has 28.