Model comparison
Longcat Flash Chat vs Muse Spark
Muse Spark is the stronger model overall, scoring 50.6 to 42.1 on the Noometry Index.
Last verified . 16 shared benchmarks.
MetaSummary
- They share 16 benchmarks with published results for both. Longcat Flash Chat scores higher in 0 categories and Muse Spark in 8 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Muse Spark leads 65.7 to 40.6.
- Longcat Flash Chat has downloadable open weights; the other is API-only.
Side by side
| Longcat Flash Chat | Muse Spark | |
|---|---|---|
| Provider | Meituan | Meta |
| Noometry Index | 42.1 | 50.6 |
| Released | — | 2026-04-08 |
| Weights | Open | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 19 | 27 |
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Category by category
Coding Muse Spark leads
Longcat Flash Chat: 43.5 (#87), Muse Spark: 46.2 (#69)
| Benchmark | Longcat Flash Chat | Muse Spark |
|---|---|---|
| LMArena Coding | 1471 | 1481 |
| SciCode | — | 51.5% |
Reasoning Muse Spark leads
Longcat Flash Chat: 19.0 (#272), Muse Spark: 35.9 (#67)
| Benchmark | Longcat Flash Chat | Muse Spark |
|---|---|---|
| LMArena Hard Prompts | 1440 | 1474 |
| Kagi LLM Benchmark | 43.9% | — |
| NYT Connections (extended) | 17.7% | — |
| CritPt | — | 11.3% |
| Epoch Capabilities Index | — | 152.04 |
Math Muse Spark leads
Longcat Flash Chat: 39.4 (#107), Muse Spark: 47.8 (#66)
| Benchmark | Longcat Flash Chat | Muse Spark |
|---|---|---|
| LMArena Math | 1442 | 1455 |
| OTIS Mock AIME 2024-2025 | — | 88.9% |
| ProofBench | — | 17% |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Tier 4 (v1) | — | 14.6% |
Knowledge Muse Spark leads
Longcat Flash Chat: 40.6 (#116), Muse Spark: 65.7 (#13)
| Benchmark | Longcat Flash Chat | Muse Spark |
|---|---|---|
| LMArena Expert | 1454 | 1457 |
| GPQA Diamond | — | 89.8% |
| Humanity's Last Exam | — | 40.6% |
Multimodal Not comparable
Longcat Flash Chat: —, Muse Spark: 43.4 (#24)
| Benchmark | Longcat Flash Chat | Muse Spark |
|---|---|---|
| LMArena Vision | — | 1306 |
| LMArena Document | — | 1444 |
Multilingual Muse Spark leads
Longcat Flash Chat: 51.9 (#101), Muse Spark: 56.1 (#24)
| Benchmark | Longcat Flash Chat | Muse Spark |
|---|---|---|
| LMArena Non-English | 1404 | 1464 |
| LMArena Chinese | 1465 | 1509 |
| LMArena French | 1456 | 1497 |
| LMArena German | 1408 | 1497 |
| LMArena Korean | 1371 | 1459 |
| LMArena Russian | 1395 | 1466 |
| LMArena Spanish | 1445 | 1472 |
| LMArena Japanese | 1373 | — |
Instruction Following Muse Spark leads
Longcat Flash Chat: 74.4 (#96), Muse Spark: 75.9 (#51)
| Benchmark | Longcat Flash Chat | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1411 | 1442 |
Long Context Too close to call
Longcat Flash Chat: 43.5 (#93), Muse Spark: 44.4 (#69)
| Benchmark | Longcat Flash Chat | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1425 | 1451 |
Writing & Preference Muse Spark leads
Longcat Flash Chat: 61.0 (#91), Muse Spark: 66.0 (#39)
| Benchmark | Longcat Flash Chat | Muse Spark |
|---|---|---|
| LMArena Text | 1427 | 1474 |
| LMArena Creative Writing | 1388 | 1459 |
| LMArena Multi-Turn | 1418 | 1477 |
Frequently asked questions
Is Longcat Flash Chat better than Muse Spark?
Muse Spark is the stronger model overall, scoring 50.6 to 42.1 on the Noometry Index.
Is Longcat Flash Chat or Muse Spark better for coding?
Muse Spark scores higher on coding benchmarks: 46.2 versus 43.5 in the Noometry coding category.
How many benchmarks do Longcat Flash Chat and Muse Spark share?
16 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Muse Spark has 27.