Noometry

Model comparison

GPT-4.5 vs Longcat Flash Chat

Longcat Flash Chat is the stronger model overall, scoring 41.5 to 36.9 on the Noometry Index.

Last verified . 16 shared benchmarks.

GPT-4.5 OpenAI

36.9

Rank #200 Confirmed

Longcat Flash Chat Meituan

41.5

Rank #121 Confirmed

Summary

  • They share 16 benchmarks with published results for both. GPT-4.5 scores higher in 1 category and Longcat Flash Chat in 7 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Longcat Flash Chat leads 40.0 to 32.4.
  • Longcat Flash Chat has downloadable open weights; the other is API-only.

Side by side

GPT-4.5Longcat Flash Chat
ProviderOpenAIMeituan
Noometry Index36.941.5
Released2025-02-27—
WeightsProprietaryOpen
Context window——
Max output——
Input $ / M tokens——
Output $ / M tokens——
Results tracked4219

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Category by category

Coding Longcat Flash Chat leads

GPT-4.5: 41.8 (#102), Longcat Flash Chat: 42.9 (#85)

BenchmarkGPT-4.5Longcat Flash Chat
LMArena Coding13971471
Aider Polyglot44.9%—
WeirdML39.4%—
LiveBench Coding75.2%—

Agentic & Tool Use Not comparable

GPT-4.5: 27.6 (#92), Longcat Flash Chat: —

BenchmarkGPT-4.5Longcat Flash Chat
Cybench17.5%—

Reasoning Longcat Flash Chat leads

GPT-4.5: 14.1 (#320), Longcat Flash Chat: 18.3 (#267)

BenchmarkGPT-4.5Longcat Flash Chat
LMArena Hard Prompts14041440
ARC-AGI-20.8%—
SimpleBench34.5%—
Kagi LLM Benchmark—43.9%
NYT Connections (extended)—17.7%
ARC-AGI-110.3%—
EnigmaEval3.2%—
LiveBench Reasoning71.1%—
LiveBench Data Analysis64.3%—
Epoch Capabilities Index136.74—
ForecastBench61.7—
LiveBench69%—

Math Longcat Flash Chat leads

GPT-4.5: 31.0 (#200), Longcat Flash Chat: 36.6 (#107)

BenchmarkGPT-4.5Longcat Flash Chat
LMArena Math14121441
OTIS Mock AIME 2024-202537.8%—
LiveBench Math69.3%—
MATH Level 578.6%—

Knowledge Longcat Flash Chat leads

GPT-4.5: 32.4 (#205), Longcat Flash Chat: 40.0 (#111)

BenchmarkGPT-4.5Longcat Flash Chat
LMArena Expert13941454
GPQA Diamond68.7%—
Humanity's Last Exam5.4%—
Confabulations13.6%—

Multimodal Not comparable

GPT-4.5: 37.0 (#68), Longcat Flash Chat: —

BenchmarkGPT-4.5Longcat Flash Chat
LMArena Vision1195—
VPCT45%—

Multilingual Too close to call

GPT-4.5: 52.7 (#78), Longcat Flash Chat: 52.1 (#95)

BenchmarkGPT-4.5Longcat Flash Chat
LMArena Non-English14131404
LMArena Chinese14211465
LMArena French14171457
LMArena German14571409
LMArena Japanese14161373
LMArena Korean13921372
LMArena Russian14191396
LMArena Spanish—1445

Instruction Following Longcat Flash Chat leads

GPT-4.5: 72.8 (#129), Longcat Flash Chat: 74.6 (#92)

BenchmarkGPT-4.5Longcat Flash Chat
LMArena Instruction Following14041411
LiveBench Instruction Following72.3%—

Long Context Longcat Flash Chat leads

GPT-4.5: 40.4 (#150), Longcat Flash Chat: 43.5 (#89)

BenchmarkGPT-4.5Longcat Flash Chat
LMArena Longer Query14061425
Fiction.LiveBench63.9%—

Writing & Preference Longcat Flash Chat leads

GPT-4.5: 57.1 (#129), Longcat Flash Chat: 61.2 (#88)

BenchmarkGPT-4.5Longcat Flash Chat
LMArena Text14171427
LMArena Creative Writing13941388
LMArena Multi-Turn14441418
Short-Story Creative Writing75.6%—
EQ-Bench Creative Writing1258—
LiveBench Language61.5%—

Frequently asked questions

Is GPT-4.5 better than Longcat Flash Chat?

Longcat Flash Chat is the stronger model overall, scoring 41.5 to 36.9 on the Noometry Index.

Is GPT-4.5 or Longcat Flash Chat better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 42.9 versus 41.8 in the Noometry coding category.

How many benchmarks do GPT-4.5 and Longcat Flash Chat share?

16 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Longcat Flash Chat has 19.

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