# Hy4 preview vs Longcat Flash Chat

> Hy4 preview is the stronger model overall, scoring 44.6 to 41.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/hy4-preview-vs-longcat-flash-chat
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Hy4 preview scores higher in 3 categories and Longcat Flash Chat in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Hy4 preview leads 54.5 to 36.6.
- The biggest single-benchmark swing is NYT Connections (extended): 68.2% for Hy4 preview and 17.7% for Longcat Flash Chat.

## Snapshot

| | Hy4 preview | Longcat Flash Chat |
|---|---|---|
| Provider | Tencent | Meituan |
| Noometry Index | 44.6 | 41.5 |
| Rank | 73 | 121 |
| Context | 1.05M | — |
| Input $/M | $0.83 | — |
| Output $/M | $2.50 | — |
| Weights | Open | Open |

## Coding

- Hy4 preview: 51.4 (#36)
- Longcat Flash Chat: 42.9 (#85)

| Benchmark | Hy4 preview | Longcat Flash Chat |
|---|---|---|
| LMArena WebDev | 1633 | — |
| LMArena Coding | — | 1471 |

## Reasoning

- Hy4 preview: 30.6 (#75)
- Longcat Flash Chat: 18.3 (#267)

| Benchmark | Hy4 preview | Longcat Flash Chat |
|---|---|---|
| NYT Connections (extended) | 68.2% | 17.7% |
| Kagi LLM Benchmark | — | 43.9% |
| LMArena Hard Prompts | — | 1440 |

## Math

- Hy4 preview: 54.5 (#37)
- Longcat Flash Chat: 36.6 (#107)

| Benchmark | Hy4 preview | Longcat Flash Chat |
|---|---|---|
| ProofBench | 75% | — |
| LMArena Math | — | 1441 |

## Knowledge

- Hy4 preview: —
- Longcat Flash Chat: 40.0 (#111)

| Benchmark | Hy4 preview | Longcat Flash Chat |
|---|---|---|
| LMArena Expert | — | 1454 |

## Multilingual

- Hy4 preview: —
- Longcat Flash Chat: 52.1 (#95)

| Benchmark | Hy4 preview | Longcat Flash Chat |
|---|---|---|
| LMArena Non-English | — | 1404 |
| LMArena Chinese | — | 1465 |
| LMArena French | — | 1457 |
| LMArena German | — | 1409 |
| LMArena Japanese | — | 1373 |
| LMArena Korean | — | 1372 |
| LMArena Russian | — | 1396 |
| LMArena Spanish | — | 1445 |

## Instruction Following

- Hy4 preview: —
- Longcat Flash Chat: 74.6 (#92)

| Benchmark | Hy4 preview | Longcat Flash Chat |
|---|---|---|
| LMArena Instruction Following | — | 1411 |

## Long Context

- Hy4 preview: —
- Longcat Flash Chat: 43.5 (#89)

| Benchmark | Hy4 preview | Longcat Flash Chat |
|---|---|---|
| LMArena Longer Query | — | 1425 |

## Writing & Preference

- Hy4 preview: —
- Longcat Flash Chat: 61.2 (#88)

| Benchmark | Hy4 preview | Longcat Flash Chat |
|---|---|---|
| LMArena Text | — | 1427 |
| LMArena Creative Writing | — | 1388 |
| LMArena Multi-Turn | — | 1418 |

## FAQ

### Is Hy4 preview better than Longcat Flash Chat?

Hy4 preview is the stronger model overall, scoring 44.6 to 41.5 on the Noometry Index.

### Is Hy4 preview or Longcat Flash Chat better for coding?

Hy4 preview scores higher on coding benchmarks: 51.4 versus 42.9 in the Noometry coding category.

### How many benchmarks do Hy4 preview and Longcat Flash Chat share?

1 benchmark has published results for both models. Hy4 preview has 3 scored results on Noometry and Longcat Flash Chat has 19.