Noometry

Model comparison

DeepSeek V4 Flash vs Qwen3.5 Max Preview

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 45.3 on the Noometry Index.

Last verified . 17 shared benchmarks.

DeepSeek V4 Flash DeepSeek

53.6

Rank #35 Confirmed

Qwen3.5 Max Preview Alibaba (Qwen)

45.3

Rank #71 Confirmed

Summary

  • They share 17 benchmarks with published results for both. DeepSeek V4 Flash scores higher in 4 categories and Qwen3.5 Max Preview in 4 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where DeepSeek V4 Flash leads 53.7 to 30.8.
  • DeepSeek V4 Flash has downloadable open weights; the other is API-only.

Side by side

DeepSeek V4 FlashQwen3.5 Max Preview
ProviderDeepSeekAlibaba (Qwen)
Noometry Index53.645.3
Released2026-04-24—
WeightsOpenProprietary
Context window1M—
Max output393K—
Input $ / M tokens$0.15—
Output $ / M tokens$0.60—
Results tracked4117

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Category by category

Coding DeepSeek V4 Flash leads

DeepSeek V4 Flash: 47.9 (#59), Qwen3.5 Max Preview: 44.0 (#77)

BenchmarkDeepSeek V4 FlashQwen3.5 Max Preview
LMArena Coding14571487
FrontierCode18.8%—
LMArena WebDev1582—
SciCode49.9%—
WeirdML63%—
ALE-Bench1,306—

Reasoning DeepSeek V4 Flash leads

DeepSeek V4 Flash: 53.7 (#30), Qwen3.5 Max Preview: 30.8 (#84)

BenchmarkDeepSeek V4 FlashQwen3.5 Max Preview
LMArena Hard Prompts14441483
ARC-AGI-261.4%—
SimpleBench61.1%—
Kagi LLM Benchmark52.2%—
NYT Connections (extended)89.6%—
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), Qwen3.5 Max Preview: 40.1 (#94)

BenchmarkDeepSeek V4 FlashQwen3.5 Max Preview
LMArena Math14271474
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), Qwen3.5 Max Preview: 41.8 (#107)

BenchmarkDeepSeek V4 FlashQwen3.5 Max Preview
LMArena Expert14411489
GPQA Diamond91%—
SimpleQA Verified33.6%—

Multilingual Qwen3.5 Max Preview leads

DeepSeek V4 Flash: 53.0 (#72), Qwen3.5 Max Preview: 56.2 (#22)

BenchmarkDeepSeek V4 FlashQwen3.5 Max Preview
LMArena Non-English14201465
LMArena Chinese14681534
LMArena French14391484
LMArena German14181487
LMArena Japanese14061495
LMArena Korean13841438
LMArena Russian14281471
LMArena Spanish14361470

Instruction Following Qwen3.5 Max Preview leads

DeepSeek V4 Flash: 74.9 (#81), Qwen3.5 Max Preview: 77.0 (#31)

BenchmarkDeepSeek V4 FlashQwen3.5 Max Preview
LMArena Instruction Following14211467

Long Context Qwen3.5 Max Preview leads

DeepSeek V4 Flash: 43.8 (#85), Qwen3.5 Max Preview: 45.2 (#45)

BenchmarkDeepSeek V4 FlashQwen3.5 Max Preview
LMArena Longer Query14341476

Writing & Preference Qwen3.5 Max Preview leads

DeepSeek V4 Flash: 63.8 (#61), Qwen3.5 Max Preview: 66.0 (#41)

BenchmarkDeepSeek V4 FlashQwen3.5 Max Preview
LMArena Text14321470
LMArena Creative Writing14031464
LMArena Multi-Turn14491478
EQ-Bench Creative Writing1559—

Frequently asked questions

Is DeepSeek V4 Flash better than Qwen3.5 Max Preview?

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 45.3 on the Noometry Index.

Is DeepSeek V4 Flash or Qwen3.5 Max Preview better for coding?

DeepSeek V4 Flash scores higher on coding benchmarks: 47.9 versus 44.0 in the Noometry coding category.

How many benchmarks do DeepSeek V4 Flash and Qwen3.5 Max Preview share?

17 benchmarks have published results for both models. DeepSeek V4 Flash has 41 scored results on Noometry and Qwen3.5 Max Preview has 17.

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