Noometry

Model comparison

GPT-5.4 mini vs Longcat Flash Chat

GPT-5.4 mini is the stronger model overall, scoring 45.0 to 42.1 on the Noometry Index.

Last verified . 19 shared benchmarks.

GPT-5.4 mini OpenAI

45.0

Rank #76 Confirmed

Longcat Flash Chat Meituan

42.1

Rank #120 Confirmed

Summary

  • They share 19 benchmarks with published results for both. GPT-5.4 mini scores higher in 6 categories and Longcat Flash Chat in 2 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-5.4 mini leads 30.4 to 19.0.
  • The biggest single-benchmark swing is NYT Connections (extended): 61.8% for GPT-5.4 mini and 17.7% for Longcat Flash Chat.
  • Longcat Flash Chat has downloadable open weights; the other is API-only.

Side by side

GPT-5.4 miniLongcat Flash Chat
ProviderOpenAIMeituan
Noometry Index45.042.1
Released2026-03-17—
WeightsProprietaryOpen
Context window400K—
Max output128K—
Input $ / M tokens$0.75—
Output $ / M tokens$4.50—
Results tracked4619

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Category by category

Coding GPT-5.4 mini leads

GPT-5.4 mini: 45.2 (#72), Longcat Flash Chat: 43.5 (#87)

BenchmarkGPT-5.4 miniLongcat Flash Chat
LMArena Coding14381471
FrontierCode27%—
LMArena WebDev1397—
SciCode49.9%—
WeirdML60.3%—
ALE-Bench1,189—

Agentic & Tool Use Not comparable

GPT-5.4 mini: 29.9 (#81), Longcat Flash Chat: —

BenchmarkGPT-5.4 miniLongcat Flash Chat
DeepResearch Bench36.3%—

Reasoning GPT-5.4 mini leads

GPT-5.4 mini: 30.4 (#85), Longcat Flash Chat: 19.0 (#272)

BenchmarkGPT-5.4 miniLongcat Flash Chat
Kagi LLM Benchmark37.9%43.9%
NYT Connections (extended)61.8%17.7%
LMArena Hard Prompts14241440
ARC-AGI-218.9%—
ARC-AGI-163.7%—
CritPt10%—
Chess Puzzles24%—
Thematic Generalization61.7%—
Mystery Game Puzzles11%—
DTBench80%—
LMCA40.8%—
Epoch Capabilities Index148.84—
ForecastBench57—

Math GPT-5.4 mini leads

GPT-5.4 mini: 45.5 (#75), Longcat Flash Chat: 39.4 (#107)

BenchmarkGPT-5.4 miniLongcat Flash Chat
LMArena Math14191442
FrontierMath (Tiers 1-3)51.2%—
FrontierMath Tier 49.8%—
OTIS Mock AIME 2024-202588.9%—
ProofBench21%—
FrontierMath (Feb 2025 set)28.3%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge GPT-5.4 mini leads

GPT-5.4 mini: 51.5 (#67), Longcat Flash Chat: 40.6 (#116)

BenchmarkGPT-5.4 miniLongcat Flash Chat
LMArena Expert14351454
GPQA Diamond86.9%—
SimpleQA Verified29.4%—
Vectara Hallucination Rate5.5%—

Multimodal Not comparable

GPT-5.4 mini: 39.7 (#56), Longcat Flash Chat: —

BenchmarkGPT-5.4 miniLongcat Flash Chat
LMArena Vision1245—

Multilingual Too close to call

GPT-5.4 mini: 51.9 (#96), Longcat Flash Chat: 51.9 (#101)

BenchmarkGPT-5.4 miniLongcat Flash Chat
LMArena Non-English14051404
LMArena Chinese14461465
LMArena French14401456
LMArena German14091408
LMArena Japanese13741373
LMArena Korean13681371
LMArena Russian14171395
LMArena Spanish14051445

Instruction Following Too close to call

GPT-5.4 mini: 74.1 (#102), Longcat Flash Chat: 74.4 (#96)

BenchmarkGPT-5.4 miniLongcat Flash Chat
LMArena Instruction Following14051411

Long Context Too close to call

GPT-5.4 mini: 43.0 (#112), Longcat Flash Chat: 43.5 (#93)

BenchmarkGPT-5.4 miniLongcat Flash Chat
LMArena Longer Query14071425

Writing & Preference GPT-5.4 mini leads

GPT-5.4 mini: 64.0 (#58), Longcat Flash Chat: 61.0 (#91)

BenchmarkGPT-5.4 miniLongcat Flash Chat
LMArena Text14121427
LMArena Creative Writing13701388
LMArena Multi-Turn14291418
EQ-Bench Creative Writing1665—

Frequently asked questions

Is GPT-5.4 mini better than Longcat Flash Chat?

GPT-5.4 mini is the stronger model overall, scoring 45.0 to 42.1 on the Noometry Index.

Is GPT-5.4 mini or Longcat Flash Chat better for coding?

GPT-5.4 mini scores higher on coding benchmarks: 45.2 versus 43.5 in the Noometry coding category.

How many benchmarks do GPT-5.4 mini and Longcat Flash Chat share?

19 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and Longcat Flash Chat has 19.

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