Noometry

Model comparison

DeepSeek V4.1 Flash vs Qwen3.5 Max Preview

DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 45.3 on the Noometry Index.

Last verified . 17 shared benchmarks.

DeepSeek V4.1 Flash DeepSeek

52.8

Rank #38 Confirmed

Qwen3.5 Max Preview Alibaba (Qwen)

45.3

Rank #71 Confirmed

Summary

  • They share 17 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 5 categories and Qwen3.5 Max Preview in 3 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in math, where DeepSeek V4.1 Flash leads 66.7 to 40.1.
  • DeepSeek V4.1 Flash has downloadable open weights; the other is API-only.

Side by side

DeepSeek V4.1 FlashQwen3.5 Max Preview
ProviderDeepSeekAlibaba (Qwen)
Noometry Index52.845.3
Released2026-09-09—
WeightsOpenProprietary
Context window1M—
Max output393K—
Input $ / M tokens$0.15—
Output $ / M tokens$0.60—
Results tracked3717

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Category by category

Coding DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 52.9 (#32), Qwen3.5 Max Preview: 44.0 (#77)

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
LMArena Coding15061487
LMArena WebDev1619—
SciCode51.9%—
ALE-Bench1,092—

Agentic & Tool Use Not comparable

DeepSeek V4.1 Flash: 31.2 (#69), Qwen3.5 Max Preview: —

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
APEX-Agents39.5%—
GDP.pdf19.8%—

Reasoning DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 50.2 (#36), Qwen3.5 Max Preview: 30.8 (#84)

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
LMArena Hard Prompts14831483
NYT Connections (extended)89.6%—
CritPt14.3%—
Mystery Game Puzzles43%—
DTBench89.9%—
LMCA47%—
Surface Evolver Bench46.3%—
Epoch Capabilities Index154.9—

Math DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 66.7 (#25), Qwen3.5 Max Preview: 40.1 (#94)

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
LMArena Math14771474
FrontierMath (Tiers 1-3)67.4%—
FrontierMath Tier 426.8%—
OTIS Mock AIME 2024-202598.3%—
ProofBench54%—

Knowledge DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 57.9 (#38), Qwen3.5 Max Preview: 41.8 (#107)

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
LMArena Expert15061489
GPQA Diamond89.8%—

Multimodal Not comparable

DeepSeek V4.1 Flash: 39.1 (#61), Qwen3.5 Max Preview: —

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
LMArena Vision1277—
Furniture Assembly34.2%—

Multilingual Qwen3.5 Max Preview leads

DeepSeek V4.1 Flash: 55.0 (#35), Qwen3.5 Max Preview: 56.2 (#22)

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
LMArena Non-English14481465
LMArena Chinese14971534
LMArena French14521484
LMArena German14841487
LMArena Japanese14121495
LMArena Korean14521438
LMArena Russian14711471
LMArena Spanish14591470

Instruction Following Too close to call

DeepSeek V4.1 Flash: 77.3 (#26), Qwen3.5 Max Preview: 77.0 (#31)

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
LMArena Instruction Following14741467

Long Context Too close to call

DeepSeek V4.1 Flash: 45.2 (#47), Qwen3.5 Max Preview: 45.2 (#45)

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
LMArena Longer Query14751476

Writing & Preference Too close to call

DeepSeek V4.1 Flash: 65.4 (#48), Qwen3.5 Max Preview: 66.0 (#41)

BenchmarkDeepSeek V4.1 FlashQwen3.5 Max Preview
LMArena Text14621470
LMArena Creative Writing14351464
LMArena Multi-Turn14571478
EQ-Bench Creative Writing1540—

Frequently asked questions

Is DeepSeek V4.1 Flash better than Qwen3.5 Max Preview?

DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 45.3 on the Noometry Index.

Is DeepSeek V4.1 Flash or Qwen3.5 Max Preview better for coding?

DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.9 versus 44.0 in the Noometry coding category.

How many benchmarks do DeepSeek V4.1 Flash and Qwen3.5 Max Preview share?

17 benchmarks have published results for both models. DeepSeek V4.1 Flash has 37 scored results on Noometry and Qwen3.5 Max Preview has 17.

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