# Longcat Flash Chat vs Step 5 Preview

> Step 5 Preview is the stronger model overall, scoring 43.8 to 41.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/longcat-flash-chat-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where Step 5 Preview leads 38.0 to 18.3.
- Longcat Flash Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Longcat Flash Chat | Step 5 Preview |
|---|---|---|
| Provider | Meituan | StepFun |
| Noometry Index | 41.5 | 43.8 |
| Rank | 121 | 78 |
| Context | — | 1.02M |
| Input $/M | — | $1 |
| Output $/M | — | $2.70 |
| Weights | Open | Proprietary |

## Coding

- Longcat Flash Chat: 42.9 (#85)
- Step 5 Preview: 50.6 (#40)

| Benchmark | Longcat Flash Chat | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |
| LMArena Coding | 1471 | — |

## Reasoning

- Longcat Flash Chat: 18.3 (#267)
- Step 5 Preview: 38.0 (#58)

| Benchmark | Longcat Flash Chat | Step 5 Preview |
|---|---|---|
| Kagi LLM Benchmark | 43.9% | — |
| NYT Connections (extended) | 17.7% | — |
| CritPt | — | 20.9% |
| LMArena Hard Prompts | 1440 | — |

## Math

- Longcat Flash Chat: 36.6 (#107)
- Step 5 Preview: —

| Benchmark | Longcat Flash Chat | Step 5 Preview |
|---|---|---|
| LMArena Math | 1441 | — |

## Knowledge

- Longcat Flash Chat: 40.0 (#111)
- Step 5 Preview: —

| Benchmark | Longcat Flash Chat | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1454 | — |

## Multilingual

- Longcat Flash Chat: 52.1 (#95)
- Step 5 Preview: —

| Benchmark | Longcat Flash Chat | Step 5 Preview |
|---|---|---|
| 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

- Longcat Flash Chat: 74.6 (#92)
- Step 5 Preview: —

| Benchmark | Longcat Flash Chat | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1411 | — |

## Long Context

- Longcat Flash Chat: 43.5 (#89)
- Step 5 Preview: —

| Benchmark | Longcat Flash Chat | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1425 | — |

## Writing & Preference

- Longcat Flash Chat: 61.2 (#88)
- Step 5 Preview: —

| Benchmark | Longcat Flash Chat | Step 5 Preview |
|---|---|---|
| LMArena Text | 1427 | — |
| LMArena Creative Writing | 1388 | — |
| LMArena Multi-Turn | 1418 | — |

## FAQ

### Is Longcat Flash Chat better than Step 5 Preview?

Step 5 Preview is the stronger model overall, scoring 43.8 to 41.5 on the Noometry Index.

### Is Longcat Flash Chat or Step 5 Preview better for coding?

Step 5 Preview scores higher on coding benchmarks: 50.6 versus 42.9 in the Noometry coding category.

### How many benchmarks do Longcat Flash Chat and Step 5 Preview share?

0 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Step 5 Preview has 3.