Noometry

Model comparison

DeepSeek V4.1 Flash vs Qwen1.5 4b Chat

DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 28.8 on the Noometry Index.

Last verified . 13 shared benchmarks.

DeepSeek V4.1 Flash DeepSeek

52.8

Rank #38 Confirmed

Qwen1.5 4b Chat Alibaba (Qwen)

28.8

Rank #322 Confirmed

Summary

  • They share 13 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 8 categories and Qwen1.5 4b Chat in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in writing & preference, where DeepSeek V4.1 Flash leads 65.4 to 23.8.

Side by side

DeepSeek V4.1 FlashQwen1.5 4b Chat
ProviderDeepSeekAlibaba (Qwen)
Noometry Index52.828.8
Released2026-09-09—
WeightsOpenOpen
Context window1M—
Max output393K—
Input $ / M tokens$0.15—
Output $ / M tokens$0.60—
Results tracked3713

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Category by category

Coding DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 52.9 (#32), Qwen1.5 4b Chat: 29.1 (#308)

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
LMArena Coding1506999
LMArena WebDev1619—
SciCode51.9%—
ALE-Bench1,092—

Agentic & Tool Use Not comparable

DeepSeek V4.1 Flash: 31.2 (#69), Qwen1.5 4b Chat: —

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
APEX-Agents39.5%—
GDP.pdf19.8%—

Reasoning DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 50.2 (#36), Qwen1.5 4b Chat: 18.5 (#279)

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
LMArena Hard Prompts1483976
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), Qwen1.5 4b Chat: 30.4 (#234)

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
LMArena Math14771026
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), Qwen1.5 4b Chat: 26.7 (#255)

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
LMArena Expert1506980
GPQA Diamond89.8%—

Multimodal Not comparable

DeepSeek V4.1 Flash: 39.1 (#61), Qwen1.5 4b Chat: —

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
LMArena Vision1277—
Furniture Assembly34.2%—

Multilingual DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 55.0 (#35), Qwen1.5 4b Chat: 24.1 (#290)

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
LMArena Non-English1448979
LMArena Chinese14971024
LMArena German1484902
LMArena Russian1471952
LMArena French1452—
LMArena Japanese1412—
LMArena Korean1452—
LMArena Spanish1459—

Instruction Following DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 77.3 (#26), Qwen1.5 4b Chat: 49.0 (#300)

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
LMArena Instruction Following1474978

Long Context DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 45.2 (#47), Qwen1.5 4b Chat: 30.1 (#290)

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
LMArena Longer Query1475988

Writing & Preference DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 65.4 (#48), Qwen1.5 4b Chat: 23.8 (#309)

BenchmarkDeepSeek V4.1 FlashQwen1.5 4b Chat
LMArena Text1462997
LMArena Creative Writing1435969
LMArena Multi-Turn1457977
EQ-Bench Creative Writing1540—

Frequently asked questions

Is DeepSeek V4.1 Flash better than Qwen1.5 4b Chat?

DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 28.8 on the Noometry Index.

Is DeepSeek V4.1 Flash or Qwen1.5 4b Chat better for coding?

DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.9 versus 29.1 in the Noometry coding category.

How many benchmarks do DeepSeek V4.1 Flash and Qwen1.5 4b Chat share?

13 benchmarks have published results for both models. DeepSeek V4.1 Flash has 37 scored results on Noometry and Qwen1.5 4b Chat has 13.

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