Noometry

Model comparison

DeepSeek V4 Flash vs Longcat Flash Chat

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 42.1 on the Noometry Index.

Last verified . 19 shared benchmarks.

DeepSeek V4 Flash DeepSeek

53.6

Rank #35 Confirmed

Longcat Flash Chat Meituan

42.1

Rank #120 Confirmed

Summary

  • They share 19 benchmarks with published results for both. DeepSeek V4 Flash scores higher in 8 categories and Longcat Flash Chat in 0 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where DeepSeek V4 Flash leads 53.7 to 19.0.
  • The biggest single-benchmark swing is NYT Connections (extended): 89.6% for DeepSeek V4 Flash and 17.7% for Longcat Flash Chat.

Side by side

DeepSeek V4 FlashLongcat Flash Chat
ProviderDeepSeekMeituan
Noometry Index53.642.1
Released2026-04-24—
WeightsOpenOpen
Context window1M—
Max output393K—
Input $ / M tokens$0.15—
Output $ / M tokens$0.60—
Results tracked4119

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Category by category

Coding DeepSeek V4 Flash leads

DeepSeek V4 Flash: 47.9 (#59), Longcat Flash Chat: 43.5 (#87)

BenchmarkDeepSeek V4 FlashLongcat Flash Chat
LMArena Coding14571471
FrontierCode18.8%—
LMArena WebDev1582—
SciCode49.9%—
WeirdML63%—
ALE-Bench1,306—

Reasoning DeepSeek V4 Flash leads

DeepSeek V4 Flash: 53.7 (#30), Longcat Flash Chat: 19.0 (#272)

BenchmarkDeepSeek V4 FlashLongcat Flash Chat
Kagi LLM Benchmark52.2%43.9%
NYT Connections (extended)89.6%17.7%
LMArena Hard Prompts14441440
ARC-AGI-261.4%—
SimpleBench61.1%—
ARC-AGI-189%—
CritPt16.6%—
Chess Puzzles33%—
Mystery Game Puzzles34%—
DTBench90.9%—
LMCA41.7%—
Epoch Capabilities Index154.49—

Math DeepSeek V4 Flash leads

DeepSeek V4 Flash: 60.3 (#37), Longcat Flash Chat: 39.4 (#107)

BenchmarkDeepSeek V4 FlashLongcat Flash Chat
LMArena Math14271442
FrontierMath (Tiers 1-3)57.5%—
FrontierMath Tier 424.4%—
MathArena Final-Answer Competitions76.5%—
OTIS Mock AIME 2024-202594.4%—
ProofBench56%—

Knowledge DeepSeek V4 Flash leads

DeepSeek V4 Flash: 55.4 (#48), Longcat Flash Chat: 40.6 (#116)

BenchmarkDeepSeek V4 FlashLongcat Flash Chat
LMArena Expert14411454
GPQA Diamond91%—
SimpleQA Verified33.6%—

Multilingual DeepSeek V4 Flash leads

DeepSeek V4 Flash: 53.0 (#72), Longcat Flash Chat: 51.9 (#101)

BenchmarkDeepSeek V4 FlashLongcat Flash Chat
LMArena Non-English14201404
LMArena Chinese14681465
LMArena French14391456
LMArena German14181408
LMArena Japanese14061373
LMArena Korean13841371
LMArena Russian14281395
LMArena Spanish14361445

Instruction Following Too close to call

DeepSeek V4 Flash: 74.9 (#81), Longcat Flash Chat: 74.4 (#96)

BenchmarkDeepSeek V4 FlashLongcat Flash Chat
LMArena Instruction Following14211411

Long Context Too close to call

DeepSeek V4 Flash: 43.8 (#85), Longcat Flash Chat: 43.5 (#93)

BenchmarkDeepSeek V4 FlashLongcat Flash Chat
LMArena Longer Query14341425

Writing & Preference DeepSeek V4 Flash leads

DeepSeek V4 Flash: 63.8 (#61), Longcat Flash Chat: 61.0 (#91)

BenchmarkDeepSeek V4 FlashLongcat Flash Chat
LMArena Text14321427
LMArena Creative Writing14031388
LMArena Multi-Turn14491418
EQ-Bench Creative Writing1559—

Frequently asked questions

Is DeepSeek V4 Flash better than Longcat Flash Chat?

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 42.1 on the Noometry Index.

Is DeepSeek V4 Flash or Longcat Flash Chat better for coding?

DeepSeek V4 Flash scores higher on coding benchmarks: 47.9 versus 43.5 in the Noometry coding category.

How many benchmarks do DeepSeek V4 Flash and Longcat Flash Chat share?

19 benchmarks have published results for both models. DeepSeek V4 Flash has 41 scored results on Noometry and Longcat Flash Chat has 19.

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