# Longcat Flash Chat vs Muse Spark 1.2

> Muse Spark 1.2 is the stronger model overall, scoring 49.8 to 41.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/longcat-flash-chat-vs-muse-spark-1-2
- Last updated: 2026-10-10
- Shared benchmarks: 12

## Summary

- They share 12 benchmarks with published results for both. Longcat Flash Chat scores higher in 0 categories and Muse Spark 1.2 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 50.4 to 18.3.
- The biggest single-benchmark swing is NYT Connections (extended): 17.7% for Longcat Flash Chat and 79.2% for Muse Spark 1.2.
- Longcat Flash Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| Provider | Meituan | Meta |
| Noometry Index | 41.5 | 49.8 |
| Rank | 121 | 44 |
| Context | — | 1.05M |
| Input $/M | — | $1.25 |
| Output $/M | — | $4.25 |
| Weights | Open | Proprietary |

## Coding

- Longcat Flash Chat: 42.9 (#85)
- Muse Spark 1.2: 48.6 (#49)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| LMArena Coding | 1471 | 1497 |
| DeepSWE | — | 54.9% |
| LMArena WebDev | — | 1532 |
| FrontierSWE | — | 12% |
| SciCode | — | 56.4% |
| WeirdML | — | 60.3% |

## Agentic & Tool Use

- Longcat Flash Chat: —
- Muse Spark 1.2: 29.5 (#77)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| APEX-Agents | — | 36.4% |
| GDP.pdf | — | 16% |

## Reasoning

- Longcat Flash Chat: 18.3 (#267)
- Muse Spark 1.2: 50.4 (#32)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| NYT Connections (extended) | 17.7% | 79.2% |
| LMArena Hard Prompts | 1440 | 1490 |
| SimpleBench | — | 74.5% |
| Kagi LLM Benchmark | 43.9% | — |
| CritPt | — | 17.7% |
| DTBench | — | 94.7% |
| LMCA | — | 48.4% |
| Epoch Capabilities Index | — | 155.18 |

## Math

- Longcat Flash Chat: 36.6 (#107)
- Muse Spark 1.2: 43.8 (#68)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| ProofBench | — | 43% |
| LMArena Math | 1441 | — |

## Knowledge

- Longcat Flash Chat: 40.0 (#111)
- Muse Spark 1.2: 53.9 (#49)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| LMArena Expert | 1454 | 1485 |
| SimpleQA Verified | — | 60.3% |

## Multimodal

- Longcat Flash Chat: —
- Muse Spark 1.2: 42.6 (#24)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | — | 1304 |

## Multilingual

- Longcat Flash Chat: 52.1 (#95)
- Muse Spark 1.2: 57.4 (#10)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | 1404 | 1479 |
| LMArena Chinese | 1465 | 1519 |
| LMArena Russian | 1396 | 1494 |
| LMArena French | 1457 | — |
| LMArena German | 1409 | — |
| LMArena Japanese | 1373 | — |
| LMArena Korean | 1372 | — |
| LMArena Spanish | 1445 | — |

## Instruction Following

- Longcat Flash Chat: 74.6 (#92)
- Muse Spark 1.2: 77.1 (#30)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | 1411 | 1466 |

## Long Context

- Longcat Flash Chat: 43.5 (#89)
- Muse Spark 1.2: 45.4 (#35)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | 1425 | 1483 |

## Writing & Preference

- Longcat Flash Chat: 61.2 (#88)
- Muse Spark 1.2: 72.6 (#14)

| Benchmark | Longcat Flash Chat | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | 1427 | 1486 |
| LMArena Creative Writing | 1388 | 1444 |
| LMArena Multi-Turn | 1418 | 1504 |
| EQ-Bench Creative Writing | — | 1840 |

## FAQ

### Is Longcat Flash Chat better than Muse Spark 1.2?

Muse Spark 1.2 is the stronger model overall, scoring 49.8 to 41.5 on the Noometry Index.

### Is Longcat Flash Chat or Muse Spark 1.2 better for coding?

Muse Spark 1.2 scores higher on coding benchmarks: 48.6 versus 42.9 in the Noometry coding category.

### How many benchmarks do Longcat Flash Chat and Muse Spark 1.2 share?

12 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Muse Spark 1.2 has 28.