Noometry

Model comparison

DeepSeek V4.1 Flash vs Gemini 3.5 Flash Lite

DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 41.5 on the Noometry Index.

Last verified . 35 shared benchmarks.

DeepSeek V4.1 Flash DeepSeek

52.8

Rank #38 Confirmed

Gemini 3.5 Flash Lite Google

41.5

Rank #133 Confirmed

Summary

  • They share 35 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 9 categories and Gemini 3.5 Flash Lite in 1 category; 10 gaps are clear of the uncertainty.
  • The widest gap is in math, where DeepSeek V4.1 Flash leads 66.7 to 25.9.
  • The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 67.4% for DeepSeek V4.1 Flash and 26% for Gemini 3.5 Flash Lite.
  • DeepSeek V4.1 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $0.30 / $2.50 for Gemini 3.5 Flash Lite.
  • Gemini 3.5 Flash Lite accepts more context: 1.05M tokens versus 1M.
  • DeepSeek V4.1 Flash has downloadable open weights; the other is API-only.

Side by side

DeepSeek V4.1 FlashGemini 3.5 Flash Lite
ProviderDeepSeekGoogle
Noometry Index52.841.5
Released2026-09-092026-07-21
WeightsOpenProprietary
Context window1M1.05M
Max output393K66K
Input $ / M tokens$0.15$0.30
Output $ / M tokens$0.60$2.50
Results tracked3739

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Category by category

Coding DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 52.9 (#32), Gemini 3.5 Flash Lite: 42.4 (#104)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena WebDev16191440
SciCode51.9%41.3%
LMArena Coding15061453
ALE-Bench1,092765.27
WeirdML—39%

Agentic & Tool Use DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 31.2 (#69), Gemini 3.5 Flash Lite: 25.7 (#107)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
APEX-Agents39.5%29.3%
GDP.pdf19.8%10%

Reasoning DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 50.2 (#36), Gemini 3.5 Flash Lite: 27.8 (#114)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
NYT Connections (extended)89.6%60.4%
CritPt14.3%0%
LMArena Hard Prompts14831441
Mystery Game Puzzles43%19%
DTBench89.9%83.5%
LMCA47%37.6%
Epoch Capabilities Index154.9145.13
ARC-AGI-2—10.3%
ARC-AGI-1—53.5%
Chess Puzzles—22%
Surface Evolver Bench46.3%—

Math DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 66.7 (#25), Gemini 3.5 Flash Lite: 25.9 (#264)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
FrontierMath (Tiers 1-3)67.4%26%
FrontierMath Tier 426.8%0%
OTIS Mock AIME 2024-202598.3%71.1%
ProofBench54%13%
LMArena Math14771433

Knowledge DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 57.9 (#38), Gemini 3.5 Flash Lite: 50.1 (#72)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
GPQA Diamond89.8%83.3%
LMArena Expert15061435

Multimodal Gemini 3.5 Flash Lite leads

DeepSeek V4.1 Flash: 39.1 (#61), Gemini 3.5 Flash Lite: 41.1 (#40)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Vision12771268
Furniture Assembly34.2%—

Multilingual DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 55.0 (#35), Gemini 3.5 Flash Lite: 53.5 (#63)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Non-English14481427
LMArena Chinese14971469
LMArena French14521451
LMArena German14841454
LMArena Japanese14121427
LMArena Korean14521407
LMArena Russian14711443
LMArena Spanish14591442

Instruction Following DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 77.3 (#26), Gemini 3.5 Flash Lite: 74.8 (#85)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Instruction Following14741420

Long Context DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 45.2 (#47), Gemini 3.5 Flash Lite: 43.9 (#84)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Longer Query14751435

Writing & Preference DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 65.4 (#48), Gemini 3.5 Flash Lite: 64.2 (#57)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Text14621435
LMArena Creative Writing14351420
EQ-Bench Creative Writing15401559
LMArena Multi-Turn14571445

Frequently asked questions

Is DeepSeek V4.1 Flash better than Gemini 3.5 Flash Lite?

DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 41.5 on the Noometry Index.

Which is cheaper, DeepSeek V4.1 Flash or Gemini 3.5 Flash Lite?

DeepSeek V4.1 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Gemini 3.5 Flash Lite lists at $0.30 and $2.50.

Is DeepSeek V4.1 Flash or Gemini 3.5 Flash Lite better for coding?

DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.9 versus 42.4 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.5 Flash Lite does, with 1.05M tokens against 1M.

How many benchmarks do DeepSeek V4.1 Flash and Gemini 3.5 Flash Lite share?

35 benchmarks have published results for both models. DeepSeek V4.1 Flash has 37 scored results on Noometry and Gemini 3.5 Flash Lite has 39.

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