# Claude 2.1 vs Longcat Flash Chat

> Longcat Flash Chat is the stronger model overall, scoring 42.1 to 25.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-longcat-flash-chat
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Longcat Flash Chat leads 39.4 to 10.2.
- Longcat Flash Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 2.1 | Longcat Flash Chat |
|---|---|---|
| Provider | Anthropic | Meituan |
| Noometry Index | 25.2 | 42.1 |
| Rank | 345 | 120 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Claude 2.1: 26.2 (#327)
- Longcat Flash Chat: 43.5 (#87)

| Benchmark | Claude 2.1 | Longcat Flash Chat |
|---|---|---|
| WeirdML | 7.1% | — |
| LMArena Coding | — | 1471 |

## Reasoning

- Claude 2.1: 21.4 (#221)
- Longcat Flash Chat: 19.0 (#272)

| Benchmark | Claude 2.1 | Longcat Flash Chat |
|---|---|---|
| Kagi LLM Benchmark | — | 43.9% |
| NYT Connections (extended) | — | 17.7% |
| LMArena Hard Prompts | — | 1440 |
| DTBench | 51% | — |
| Epoch Capabilities Index | 119.27 | — |
| ForecastBench | 54.2 | — |

## Math

- Claude 2.1: 10.2 (#315)
- Longcat Flash Chat: 39.4 (#107)

| Benchmark | Claude 2.1 | Longcat Flash Chat |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | — |
| LMArena Math | — | 1442 |

## Knowledge

- Claude 2.1: 15.4 (#292)
- Longcat Flash Chat: 40.6 (#116)

| Benchmark | Claude 2.1 | Longcat Flash Chat |
|---|---|---|
| GPQA Diamond | 33% | — |
| LMArena Expert | — | 1454 |
| MMLU | 73.5% | — |

## Multilingual

- Claude 2.1: —
- Longcat Flash Chat: 51.9 (#101)

| Benchmark | Claude 2.1 | Longcat Flash Chat |
|---|---|---|
| LMArena Non-English | — | 1404 |
| LMArena Chinese | — | 1465 |
| LMArena French | — | 1456 |
| LMArena German | — | 1408 |
| LMArena Japanese | — | 1373 |
| LMArena Korean | — | 1371 |
| LMArena Russian | — | 1395 |
| LMArena Spanish | — | 1445 |

## Instruction Following

- Claude 2.1: —
- Longcat Flash Chat: 74.4 (#96)

| Benchmark | Claude 2.1 | Longcat Flash Chat |
|---|---|---|
| LMArena Instruction Following | — | 1411 |

## Long Context

- Claude 2.1: —
- Longcat Flash Chat: 43.5 (#93)

| Benchmark | Claude 2.1 | Longcat Flash Chat |
|---|---|---|
| LMArena Longer Query | — | 1425 |

## Writing & Preference

- Claude 2.1: —
- Longcat Flash Chat: 61.0 (#91)

| Benchmark | Claude 2.1 | Longcat Flash Chat |
|---|---|---|
| LMArena Text | — | 1427 |
| LMArena Creative Writing | — | 1388 |
| LMArena Multi-Turn | — | 1418 |

## FAQ

### Is Claude 2.1 better than Longcat Flash Chat?

Longcat Flash Chat is the stronger model overall, scoring 42.1 to 25.2 on the Noometry Index.

### Is Claude 2.1 or Longcat Flash Chat better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 43.5 versus 26.2 in the Noometry coding category.

### How many benchmarks do Claude 2.1 and Longcat Flash Chat share?

0 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Longcat Flash Chat has 19.