Noometry

Model comparison

Longcat Flash Chat vs Qwen3.5-Flash

Longcat Flash Chat and Qwen3.5-Flash score almost the same on the Noometry Index (42.1 vs 42.5), so choose on price, context window or the category you care about most.

Last verified . 17 shared benchmarks.

Longcat Flash Chat Meituan

42.1

Rank #120 Confirmed

Qwen3.5-Flash Alibaba (Qwen)

42.5

Rank #112 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Longcat Flash Chat scores higher in 6 categories and Qwen3.5-Flash in 2 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Qwen3.5-Flash leads 33.7 to 19.0.
  • Longcat Flash Chat has downloadable open weights; the other is API-only.

Side by side

Longcat Flash ChatQwen3.5-Flash
ProviderMeituanAlibaba (Qwen)
Noometry Index42.142.5
Released—2026-02-23
WeightsOpenProprietary
Context window—1M
Max output—66K
Input $ / M tokens—$0.10
Output $ / M tokens—$0.40
Results tracked1932

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Category by category

Coding Longcat Flash Chat leads

Longcat Flash Chat: 43.5 (#87), Qwen3.5-Flash: 34.2 (#242)

BenchmarkLongcat Flash ChatQwen3.5-Flash
LMArena Coding14711412
LMArena WebDev—1244
ALE-Bench—221.8

Agentic & Tool Use Not comparable

Longcat Flash Chat: —, Qwen3.5-Flash: —

BenchmarkLongcat Flash ChatQwen3.5-Flash
Vending-Bench 2—462.69

Reasoning Qwen3.5-Flash leads

Longcat Flash Chat: 19.0 (#272), Qwen3.5-Flash: 33.7 (#72)

BenchmarkLongcat Flash ChatQwen3.5-Flash
LMArena Hard Prompts14401403
Kagi LLM Benchmark43.9%—
NYT Connections (extended)17.7%—
Chess Puzzles—21%
Mystery Game Puzzles—20%
DTBench—82.9%
LMCA—29.1%
Epoch Capabilities Index—143.98

Math Longcat Flash Chat leads

Longcat Flash Chat: 39.4 (#107), Qwen3.5-Flash: 37.4 (#158)

BenchmarkLongcat Flash ChatQwen3.5-Flash
LMArena Math14421407
FrontierMath (Tiers 1-3)—18.2%
OTIS Mock AIME 2024-2025—84.4%
FrontierMath (Feb 2025 set)—6.2%
FrontierMath Tier 4 (v1)—0%

Knowledge Qwen3.5-Flash leads

Longcat Flash Chat: 40.6 (#116), Qwen3.5-Flash: 43.2 (#93)

BenchmarkLongcat Flash ChatQwen3.5-Flash
LMArena Expert14541407
GPQA Diamond—82.3%
SimpleQA Verified—20.3%
Vectara Hallucination Rate—10.5%

Multilingual Longcat Flash Chat leads

Longcat Flash Chat: 51.9 (#101), Qwen3.5-Flash: 50.5 (#121)

BenchmarkLongcat Flash ChatQwen3.5-Flash
LMArena Non-English14041385
LMArena Chinese14651446
LMArena French14561412
LMArena German14081390
LMArena Japanese13731368
LMArena Korean13711344
LMArena Russian13951379
LMArena Spanish14451400

Instruction Following Longcat Flash Chat leads

Longcat Flash Chat: 74.4 (#96), Qwen3.5-Flash: 72.6 (#139)

BenchmarkLongcat Flash ChatQwen3.5-Flash
LMArena Instruction Following14111374

Long Context Longcat Flash Chat leads

Longcat Flash Chat: 43.5 (#93), Qwen3.5-Flash: 42.4 (#124)

BenchmarkLongcat Flash ChatQwen3.5-Flash
LMArena Longer Query14251392

Writing & Preference Longcat Flash Chat leads

Longcat Flash Chat: 61.0 (#91), Qwen3.5-Flash: 57.9 (#122)

BenchmarkLongcat Flash ChatQwen3.5-Flash
LMArena Text14271397
LMArena Creative Writing13881343
LMArena Multi-Turn14181393

Frequently asked questions

Is Longcat Flash Chat better than Qwen3.5-Flash?

Longcat Flash Chat and Qwen3.5-Flash score almost the same on the Noometry Index (42.1 vs 42.5), so choose on price, context window or the category you care about most.

Is Longcat Flash Chat or Qwen3.5-Flash better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 43.5 versus 34.2 in the Noometry coding category.

How many benchmarks do Longcat Flash Chat and Qwen3.5-Flash share?

17 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Qwen3.5-Flash has 32.

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