Noometry

Model comparison

GPT-4.1 nano vs Longcat Flash Chat

Longcat Flash Chat is the stronger model overall, scoring 42.1 to 27.9 on the Noometry Index.

Last verified . 15 shared benchmarks.

GPT-4.1 nano OpenAI

27.9

Rank #327 Confirmed

Longcat Flash Chat Meituan

42.1

Rank #120 Confirmed

Summary

  • They share 15 benchmarks with published results for both. GPT-4.1 nano scores higher in 0 categories and Longcat Flash Chat in 8 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in writing & preference, where Longcat Flash Chat leads 61.0 to 40.5.
  • The biggest single-benchmark swing is Kagi LLM Benchmark: 33.3% for GPT-4.1 nano and 43.9% for Longcat Flash Chat.
  • Longcat Flash Chat has downloadable open weights; the other is API-only.

Side by side

GPT-4.1 nanoLongcat Flash Chat
ProviderOpenAIMeituan
Noometry Index27.942.1
Released2025-04-14—
WeightsProprietaryOpen
Context window1.05M—
Max output33K—
Input $ / M tokens$0.10—
Output $ / M tokens$0.40—
Results tracked3819

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Category by category

Coding Longcat Flash Chat leads

GPT-4.1 nano: 24.1 (#330), Longcat Flash Chat: 43.5 (#87)

BenchmarkGPT-4.1 nanoLongcat Flash Chat
LMArena Coding13061471
Aider Polyglot8.9%—
SciCode25.9%—
WeirdML19%—

Agentic & Tool Use Not comparable

GPT-4.1 nano: 26.5 (#104), Longcat Flash Chat: —

BenchmarkGPT-4.1 nanoLongcat Flash Chat
Berkeley Function Calling Leaderboard33%—

Reasoning Longcat Flash Chat leads

GPT-4.1 nano: 8.5 (#349), Longcat Flash Chat: 19.0 (#272)

BenchmarkGPT-4.1 nanoLongcat Flash Chat
Kagi LLM Benchmark33.3%43.9%
LMArena Hard Prompts12861440
ARC-AGI-20%—
NYT Connections (extended)—17.7%
ARC-AGI-10%—
CritPt0%—
DTBench52.5%—
LMCA5.5%—
Epoch Capabilities Index129.62—

Math Longcat Flash Chat leads

GPT-4.1 nano: 26.9 (#252), Longcat Flash Chat: 39.4 (#107)

BenchmarkGPT-4.1 nanoLongcat Flash Chat
LMArena Math12741442
OTIS Mock AIME 2024-202528.9%—
Omni-MATH36.7%—
MATH Level 570%—
FrontierMath (Feb 2025 set)1%—

Knowledge Longcat Flash Chat leads

GPT-4.1 nano: 21.8 (#273), Longcat Flash Chat: 40.6 (#116)

BenchmarkGPT-4.1 nanoLongcat Flash Chat
LMArena Expert12721454
GPQA Diamond48.9%—
SimpleQA Verified6%—
MMLU-Pro55%—
GPQA (HELM)50.7%—

Multimodal Not comparable

GPT-4.1 nano: 29.2 (#113), Longcat Flash Chat: —

BenchmarkGPT-4.1 nanoLongcat Flash Chat
LMArena Vision1063—

Multilingual Longcat Flash Chat leads

GPT-4.1 nano: 41.6 (#205), Longcat Flash Chat: 51.9 (#101)

BenchmarkGPT-4.1 nanoLongcat Flash Chat
LMArena Non-English12601404
LMArena Chinese12701465
LMArena German12881408
LMArena Japanese11981373
LMArena Russian12611395
LMArena French—1456
LMArena Korean—1371
LMArena Spanish—1445

Instruction Following Longcat Flash Chat leads

GPT-4.1 nano: 67.8 (#193), Longcat Flash Chat: 74.4 (#96)

BenchmarkGPT-4.1 nanoLongcat Flash Chat
LMArena Instruction Following12671411
IFEval84.3%—

Long Context Longcat Flash Chat leads

GPT-4.1 nano: 23.7 (#296), Longcat Flash Chat: 43.5 (#93)

BenchmarkGPT-4.1 nanoLongcat Flash Chat
LMArena Longer Query12831425
Fiction.LiveBench25%—

Writing & Preference Longcat Flash Chat leads

GPT-4.1 nano: 40.5 (#243), Longcat Flash Chat: 61.0 (#91)

BenchmarkGPT-4.1 nanoLongcat Flash Chat
LMArena Text12851427
LMArena Creative Writing12601388
LMArena Multi-Turn12771418
EQ-Bench Creative Writing946—
WildBench81.2%—

Frequently asked questions

Is GPT-4.1 nano better than Longcat Flash Chat?

Longcat Flash Chat is the stronger model overall, scoring 42.1 to 27.9 on the Noometry Index.

Is GPT-4.1 nano or Longcat Flash Chat better for coding?

Longcat Flash Chat scores higher on coding benchmarks: 43.5 versus 24.1 in the Noometry coding category.

How many benchmarks do GPT-4.1 nano and Longcat Flash Chat share?

15 benchmarks have published results for both models. GPT-4.1 nano has 38 scored results on Noometry and Longcat Flash Chat has 19.

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