Model comparison

DeepSeek V4.1 Flash vs Gemini 3.1 Flash Lite

DeepSeek V4.1 Flash is the stronger model overall, scoring 50.3 to 40.4 on the Noometry Index.

Last verified October 10, 2026. 22 shared benchmarks.

DeepSeek V4.1 Flash

DeepSeek

50.3

Rank #40 Confirmed

Gemini 3.1 Flash Lite

Google

40.4

Rank #141 Confirmed

Summary

They share 22 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 7 categories and Gemini 3.1 Flash Lite in 1 category; 7 gaps are clear of the uncertainty.
The widest gap is in reasoning, where DeepSeek V4.1 Flash leads 46.2 to 22.3.
The biggest single-benchmark swing is NYT Connections (extended): 89.6% for DeepSeek V4.1 Flash and 8.2% for Gemini 3.1 Flash Lite.
DeepSeek V4.1 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $0.25 / $1.50 for Gemini 3.1 Flash Lite.
Gemini 3.1 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 Flash and Gemini 3.1 Flash Lite specifications
	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
Provider	DeepSeek	Google
Noometry Index	50.3	40.4
Released	2026-09-09	2026-03-03
Weights	Open	Proprietary
Context window	1M	1.05M
Max output	393K	66K
Input $ / M tokens	$0.15	$0.25
Output $ / M tokens	$0.60	$1.50
Results tracked	25	38

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Category by category

Coding DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 52.8 (#29), Gemini 3.1 Flash Lite: 37.5 (#179)

Coding benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
LMArena WebDev	1620	1256
SciCode	51.9%	41.9%
LMArena Coding	1511	1400
ALE-Bench	1,092	797.73
WeirdML	—	52.2%

Agentic & Tool Use Not comparable

DeepSeek V4.1 Flash: —, Gemini 3.1 Flash Lite: 29.9 (#72)

Agentic & Tool Use benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
DeepResearch Bench	—	37.3%

Reasoning DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 46.2 (#39), Gemini 3.1 Flash Lite: 22.3 (#181)

Reasoning benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
NYT Connections (extended)	89.6%	8.2%
CritPt	14.3%	1.1%
LMArena Hard Prompts	1485	1407
DTBench	89.9%	76.8%
LMCA	47%	35%
Epoch Capabilities Index	155.01	144.45
Kagi LLM Benchmark	—	67.2%
Chess Puzzles	—	25%
EnigmaEval	—	3%
Thematic Generalization	—	63.3%
Surface Evolver Bench	46.3%	—
ForecastBench	—	54.4

Math DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 48.4 (#52), Gemini 3.1 Flash Lite: 39.5 (#82)

Math benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
LMArena Math	1493	1427
FrontierMath (Tiers 1-3)	—	27.7%
OTIS Mock AIME 2024-2025	—	80%
ProofBench	54%	—

Knowledge Too close to call

DeepSeek V4.1 Flash: 41.6 (#97), Gemini 3.1 Flash Lite: 41.7 (#95)

Knowledge benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
LMArena Expert	1505	1397
GPQA Diamond	—	81.8%
Humanity's Last Exam	—	8.6%
Vectara Hallucination Rate	—	8.2%

Multimodal Not comparable

DeepSeek V4.1 Flash: —, Gemini 3.1 Flash Lite: 38.7 (#57)

Multimodal benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
LMArena Vision	—	1240

Multilingual DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 55.5 (#29), Gemini 3.1 Flash Lite: 52.5 (#82)

Multilingual benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
LMArena Non-English	1452	1410
LMArena Chinese	1506	1461
LMArena French	1448	1423
LMArena Russian	1473	1420
LMArena Spanish	1499	1420
LMArena German	—	1429
LMArena Japanese	—	1411
LMArena Korean	—	1393

Instruction Following DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 77.6 (#24), Gemini 3.1 Flash Lite: 72.9 (#126)

Instruction Following benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
LMArena Instruction Following	1475	1376

Long Context DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 45.2 (#46), Gemini 3.1 Flash Lite: 42.5 (#117)

Long Context benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
LMArena Longer Query	1476	1394

Writing & Preference DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 65.8 (#43), Gemini 3.1 Flash Lite: 61.0 (#90)

Writing & Preference benchmarks
Benchmark	DeepSeek V4.1 Flash	Gemini 3.1 Flash Lite
LMArena Text	1465	1416
LMArena Creative Writing	1436	1401
LMArena Multi-Turn	1460	1417
EQ-Bench Creative Writing	1540	—

Frequently asked questions

Is DeepSeek V4.1 Flash better than Gemini 3.1 Flash Lite?

DeepSeek V4.1 Flash is the stronger model overall, scoring 50.3 to 40.4 on the Noometry Index.

Which is cheaper, DeepSeek V4.1 Flash or Gemini 3.1 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 3.1 Flash Lite lists at $0.25 and $1.50.

Is DeepSeek V4.1 Flash or Gemini 3.1 Flash Lite better for coding?

DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.8 versus 37.5 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.1 Flash Lite does, with 1.05M tokens against 1M.

How many benchmarks do DeepSeek V4.1 Flash and Gemini 3.1 Flash Lite share?

22 benchmarks have published results for both models. DeepSeek V4.1 Flash has 25 scored results on Noometry and Gemini 3.1 Flash Lite has 38.