Noometry

Model comparison

DeepSeek V4.1 Flash vs Gemini 3.5 Flash Lite

DeepSeek V4.1 Flash is the stronger model overall, scoring 50.3 to 41.8 on the Noometry Index.

Last verified . 24 shared benchmarks.

DeepSeek V4.1 Flash DeepSeek

50.3

Rank #40 Confirmed

Gemini 3.5 Flash Lite Google

41.8

Rank #113 Confirmed

Summary

  • They share 24 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 7 categories and Gemini 3.5 Flash Lite in 1 category; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where DeepSeek V4.1 Flash leads 48.4 to 25.7.
  • The biggest single-benchmark swing is ProofBench: 54% for DeepSeek V4.1 Flash and 13% 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 Index50.341.8
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 tracked2538

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Category by category

Coding DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 52.8 (#29), Gemini 3.5 Flash Lite: 42.1 (#96)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena WebDev16201440
SciCode51.9%41.3%
LMArena Coding15111455
ALE-Bench1,092765.27
WeirdML—39%

Agentic & Tool Use Not comparable

DeepSeek V4.1 Flash: —, Gemini 3.5 Flash Lite: 28.6 (#82)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
GDP.pdf—10%

Reasoning DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 46.2 (#39), Gemini 3.5 Flash Lite: 27.8 (#95)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
NYT Connections (extended)89.6%60.4%
CritPt14.3%0%
LMArena Hard Prompts14851441
DTBench89.9%83.5%
LMCA47%37.6%
Epoch Capabilities Index155.01145.12
ARC-AGI-2—10.3%
ARC-AGI-1—53.5%
Chess Puzzles—22%
Mystery Game Puzzles—19%
Surface Evolver Bench46.3%—

Math DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 48.4 (#52), Gemini 3.5 Flash Lite: 25.7 (#245)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
ProofBench54%13%
LMArena Math14931431
FrontierMath (Tiers 1-3)—26%
FrontierMath Tier 4—0%
OTIS Mock AIME 2024-2025—71.1%

Knowledge Gemini 3.5 Flash Lite leads

DeepSeek V4.1 Flash: 41.6 (#97), Gemini 3.5 Flash Lite: 50.0 (#66)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Expert15051430
GPQA Diamond—83.3%

Multimodal Not comparable

DeepSeek V4.1 Flash: —, Gemini 3.5 Flash Lite: 40.3 (#38)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Vision—1266

Multilingual DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 55.5 (#29), Gemini 3.5 Flash Lite: 53.8 (#59)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Non-English14521428
LMArena Chinese15061467
LMArena French14481452
LMArena Russian14731443
LMArena Spanish14991440
LMArena German—1454
LMArena Japanese—1428
LMArena Korean—1406

Instruction Following DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 77.6 (#24), Gemini 3.5 Flash Lite: 75.0 (#77)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Instruction Following14751420

Long Context DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 45.2 (#46), Gemini 3.5 Flash Lite: 43.8 (#80)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Longer Query14761435

Writing & Preference DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 65.8 (#43), Gemini 3.5 Flash Lite: 64.4 (#55)

BenchmarkDeepSeek V4.1 FlashGemini 3.5 Flash Lite
LMArena Text14651436
LMArena Creative Writing14361419
EQ-Bench Creative Writing15401559
LMArena Multi-Turn14601445

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 50.3 to 41.8 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: 52.8 versus 42.1 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?

24 benchmarks have published results for both models. DeepSeek V4.1 Flash has 25 scored results on Noometry and Gemini 3.5 Flash Lite has 38.

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