DeepSeek V4 Flash 0731 vs Gemini 3.1 Flash Lite Preview

DeepSeek V4 Flash 0731 leads Gemini 3.1 Flash Lite Preview on coding, 51.8 to 22.7 on the Vibe Coding Index, and DeepSeek V4 Flash 0731 costs 3.8x less per output token ($0.396 vs $1.50 per million). Updated October 22, 2026; 29 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0731 Replace Gemini 3.1 Flash Lite Preview

DeepSeek V4 Flash 0731DeepSeek

Coding: 51.8
Overall: 55.2
Output $/M: $0.396

Gemini 3.1 Flash Lite PreviewGoogle

Coding: 22.7
Overall: 36.6
Output $/M: $1.50

vs boards won of 29 shared, 1 tied

DeepSeek V4 Flash 0731 or Gemini 3.1 Flash Lite Preview: which to pick

Pick DeepSeek V4 Flash 0731 for coding: it scores 51.8 on the Vibe Coding Index against 22.7 for Gemini 3.1 Flash Lite Preview.

Pick Gemini 3.1 Flash Lite Preview for work measured by MMLU Pro or LegalBench (Vals AI), where it leads.

Model ADeepSeek V4 Flash 0731DeepSeek51.8/1004 independent benchmarks$0.01 per solved task Model BGemini 3.1 Flash Lite PreviewGoogle22.7/1003 independent benchmarks$0.18 per solved task

292650

Shared results: 29
DeepSeek V4 Flash 0731 only: 26
Gemini 3.1 Flash Lite Preview only: 50
Like-for-like categories: 7 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

Coding
Vibe Coding Index, six public coding benchmarks
DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 scores 51.8 against 22.7.
4 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 leads, 34.3 against 15.6.
Same board, both measured
Agentic work
AA Agentic Index
DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 leads, 41.0 against 1.6.
Same board, both measured
Reasoning
GPQA Diamond
DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 leads, 89.9% against 81.1%.
Same board, both measured
Math
AIME
No call
Only Gemini 3.1 Flash Lite Preview has a AIME result, 83.3%.
Directional only
Knowledge
MMLU Pro
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview leads, 86.2% against 86.2%.
Same board, both measured
Web design
Design Arena: websites
DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 leads, 1237 against 1082.
Same board, both measured
Long documents
Listed context window
No call
Both take 1.05M tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 $0.0003, Gemini 3.1 Flash Lite Preview $0.0010 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 $0.01, Gemini 3.1 Flash Lite Preview $0.18.
Published attempt cost and pass rate

At a glance

Coding index: DeepSeek V4 Flash 0731 51.8 from 4 benchmarks, Gemini 3.1 Flash Lite Preview 22.7 from 3 benchmarks.
Widest category: Agentic work, 31.8 points apart on average over 5 shared benchmarks.
Widest single gap: Vibe Code Bench (Vals AI): DeepSeek V4 Flash 0731 74.7% against Gemini 3.1 Flash Lite Preview 0.0%, 74.7 points apart on a 0 to 100 scale.
Output price: DeepSeek V4 Flash 0731 $0.396 against Gemini 3.1 Flash Lite Preview $1.50 per million output tokens, 3.8x apart.
Context window: Both take 1.05M tokens.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
Category	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Ties
Coding	7	0	1 tie
Intelligence	1	0
Agentic work	5	0
Reasoning	1	0
Knowledge	1	4
Web design	7	1
General	1	0
All shared boards	23	5	1 tie

CodingLike-for-likeSix of these boards feed the Vibe Coding Index70

Coding benchmarks for DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Leader
LMArena WebDev	Not measured	1257	Only Gemini 3.1 Flash Lite Preview measured
AA Coding Index	69.1	34.7	DeepSeek V4 Flash 0731
LiveCodeBench (Vals AI)	87.3%	80.1%	DeepSeek V4 Flash 0731
SWE-bench Verified (Vals AI)	88.8%	62.8%	DeepSeek V4 Flash 0731
Terminal-Bench 4 (Vals AI)	18.7%	Not measured	Only DeepSeek V4 Flash 0731 measured
Vibe Code Bench (Vals AI)	74.7%	0.0%	DeepSeek V4 Flash 0731
Code migration (Vals AI)	38.6%	4.6%	DeepSeek V4 Flash 0731
ProgramBench (Vals AI)	0.0%	0.0%	Tie
IOI (Vals AI)	32.7%	Not measured	Only DeepSeek V4 Flash 0731 measured
Terminal-Bench 2.1 (Vals AI)	67.0%	34.1%	DeepSeek V4 Flash 0731
SkillsBench (Vals AI)	50.7%	Not measured	Only DeepSeek V4 Flash 0731 measured
CyberBench (Vals AI)	72.1%	Not measured	Only DeepSeek V4 Flash 0731 measured
SciCode	50.3%	Not measured	Only DeepSeek V4 Flash 0731 measured
FrontierCode	18.8%	Not measured	Only DeepSeek V4 Flash 0731 measured
WeirdML	63.0%	Not measured	Only DeepSeek V4 Flash 0731 measured
ALE-Bench	1306.1	797.7	DeepSeek V4 Flash 0731
LMArena Text: coding	Not measured	1400	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: software and IT	Not measured	1413	Only Gemini 3.1 Flash Lite Preview measured
LMArena WebDev: React	Not measured	1245	Only Gemini 3.1 Flash Lite Preview measured
LMArena WebDev: HTML	Not measured	1276	Only Gemini 3.1 Flash Lite Preview measured
LMArena WebDev: from an image	Not measured	1336	Only Gemini 3.1 Flash Lite Preview measured
SciCode	Not measured	4.6%	Only Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 17 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10

Intelligence benchmarks for DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Leader
AA Intelligence Index	34.3	15.6	DeepSeek V4 Flash 0731
Epoch Capabilities Index	154.8	Not measured	Only DeepSeek V4 Flash 0731 measured

Agentic workLike-for-likePublic boards, shown as published, kept out of the index50

Agentic work benchmarks for DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Leader
AA Agentic Index	41.0	1.6	DeepSeek V4 Flash 0731
Finance Agent (Vals AI)	49.5%	30.0%	DeepSeek V4 Flash 0731
Tax Agent Bench (Vals AI)	28.1%	3.1%	DeepSeek V4 Flash 0731
Legal Research Bench (Vals AI)	30.3%	3.4%	DeepSeek V4 Flash 0731
Excel Modeling Benchmark (Vals AI)	57.0%	8.6%	DeepSeek V4 Flash 0731
BioMysteryBench (Vals AI)	64.4%	Not measured	Only DeepSeek V4 Flash 0731 measured
Terminal-Bench-Science (Vals AI)	4.3%	Not measured	Only DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 34 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index10

Reasoning benchmarks for DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Leader
GPQA Diamond	89.9%	81.1%	DeepSeek V4 Flash 0731
MMMU Pro (Vals AI)	Not measured	82.5%	Only Gemini 3.1 Flash Lite Preview measured
GPQA Diamond (Artificial Analysis run)	90.8%	Not measured	Only DeepSeek V4 Flash 0731 measured
Humanity's Last Exam (Artificial Analysis run)	38.6%	Not measured	Only DeepSeek V4 Flash 0731 measured
GPQA Diamond (Epoch AI run)	91.0%	Not measured	Only DeepSeek V4 Flash 0731 measured
ARC-AGI	89.0%	Not measured	Only DeepSeek V4 Flash 0731 measured
ARC-AGI-2	61.4%	Not measured	Only DeepSeek V4 Flash 0731 measured
SimpleBench	61.1%	Not measured	Only DeepSeek V4 Flash 0731 measured
Chess puzzles	32.0%	Not measured	Only DeepSeek V4 Flash 0731 measured
Mystery game puzzles	34.0%	Not measured	Only DeepSeek V4 Flash 0731 measured
LMArena Text: hard prompts	Not measured	1407	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: expert	Not measured	1398	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: hard prompts in English	Not measured	1403	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: diagrams	Not measured	1242	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: homework	Not measured	1271	Only Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 7 boards here

MathDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared

Math benchmarks for DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Leader
AIME	Not measured	83.3%	Only Gemini 3.1 Flash Lite Preview measured
OTIS Mock AIME	94.4%	Not measured	Only DeepSeek V4 Flash 0731 measured
FrontierMath, tiers 1 to 3	57.5%	Not measured	Only DeepSeek V4 Flash 0731 measured
FrontierMath, tier 4	24.4%	Not measured	Only DeepSeek V4 Flash 0731 measured
ProofBench	56.0%	Not measured	Only DeepSeek V4 Flash 0731 measured
LMArena Text: math	Not measured	1428	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: mathematical work	Not measured	1417	Only Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 6 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index14

Knowledge benchmarks for DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Leader
MMLU Pro	86.2%	86.2%	Gemini 3.1 Flash Lite Preview
LegalBench (Vals AI)	77.7%	83.8%	Gemini 3.1 Flash Lite Preview
CaseLaw (Vals AI)	Not measured	55.0%	Only Gemini 3.1 Flash Lite Preview measured
CorpFin (Vals AI)	61.9%	59.4%	DeepSeek V4 Flash 0731
TaxEval (Vals AI)	70.7%	71.8%	Gemini 3.1 Flash Lite Preview
MortgageTax (Vals AI)	Not measured	68.0%	Only Gemini 3.1 Flash Lite Preview measured
MedCode (Vals AI)	41.4%	47.6%	Gemini 3.1 Flash Lite Preview
SimpleQA Verified	33.6%	Not measured	Only DeepSeek V4 Flash 0731 measured
LMArena Text: science	Not measured	1425	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: medicine and healthcare	Not measured	1428	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: legal and government	Not measured	1418	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: business and finance	Not measured	1389	Only Gemini 3.1 Flash Lite Preview measured
FACTS Benchmark Suite	Not measured	51.4%	Only Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 5 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index71

Web design benchmarks for DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Leader
Design Arena: websites	1237	1082	DeepSeek V4 Flash 0731
Design Arena: UI components	1233	1069	DeepSeek V4 Flash 0731
Design Arena: game dev	1207	1029	DeepSeek V4 Flash 0731
Design Arena: data viz	1180	1045	DeepSeek V4 Flash 0731
Design Arena: 3D	1208	1047	DeepSeek V4 Flash 0731
Design Arena: all code categories	1229	1072	DeepSeek V4 Flash 0731
Design Arena: SVG	1184	1052	DeepSeek V4 Flash 0731
Design Arena: ASCII art	1090	1167	Gemini 3.1 Flash Lite Preview
Neither model has a result on the other 1 board here

GeneralLike-for-likePublic boards, shown as published, kept out of the index10

General benchmarks for DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Leader
SAGE (Vals AI)	Not measured	49.5%	Only Gemini 3.1 Flash Lite Preview measured
MedScribe (Vals AI)	80.4%	63.9%	DeepSeek V4 Flash 0731
Vals Multimodal Index	Not measured	41.4%	Only Gemini 3.1 Flash Lite Preview measured
Long context reasoning (AA-LCR)	79.7%	Not measured	Only DeepSeek V4 Flash 0731 measured
DTBench	90.9%	Not measured	Only DeepSeek V4 Flash 0731 measured
LMCA	41.7%	Not measured	Only DeepSeek V4 Flash 0731 measured
LMArena Text	Not measured	1416	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: instruction following	Not measured	1377	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: creative writing	Not measured	1401	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision	Not measured	1240	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: English	Not measured	1414	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: non-English	Not measured	1410	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: Chinese	Not measured	1460	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: German	Not measured	1430	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: Japanese	Not measured	1413	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: Korean	Not measured	1392	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: French	Not measured	1424	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: Spanish	Not measured	1421	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: Russian	Not measured	1420	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: Polish	Not measured	1443	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: multi-turn	Not measured	1417	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: longer queries	Not measured	1394	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: writing and language	Not measured	1408	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: entertainment and media	Not measured	1386	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: English	Not measured	1232	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: Chinese	Not measured	1278	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: reading text	Not measured	1246	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: humor	Not measured	1266	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: captioning	Not measured	1259	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: recognizing things	Not measured	1308	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: creative writing	Not measured	1248	Only Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 15 boards here

Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared

Image generation benchmarks for DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Flash 0731	Gemini 3.1 Flash Lite Preview	Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

DeepSeek V4 Flash 0731$0.0003Fits in one request

Gemini 3.1 Flash Lite Preview$0.0010Fits in one request

DeepSeek V4 Flash 0731 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0731$0.0082Fits in one request

Gemini 3.1 Flash Lite Preview$0.017Fits in one request

DeepSeek V4 Flash 0731 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0731$0.032Fits in one request

Gemini 3.1 Flash Lite Preview$0.065Fits in one request

DeepSeek V4 Flash 0731 costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of DeepSeek V4 Flash 0731 and Gemini 3.1 Flash Lite Preview
Specification	DeepSeek V4 Flash 0731	Google Gemini 3.1 Flash Lite Preview
Maker	DeepSeek	Google
Weights	Open weights	No public weights listed
Released	July 31, 2026	March 3, 2026
Context window	1.05M	1.05M
Input $/Mtok	$0.14	$0.25
Output $/Mtok	$0.396	$1.50
Coding index	51.8	22.7
Independent measurements behind it	4	3
Cost per solved task	$0.01	$0.18
Source	OpenRouter listing	OpenRouter listing

Questions

Is DeepSeek V4 Flash 0731 better than Gemini 3.1 Flash Lite Preview for coding?

Pick DeepSeek V4 Flash 0731 for coding: it scores 51.8 on the Vibe Coding Index against 22.7 for Gemini 3.1 Flash Lite Preview. Pick Gemini 3.1 Flash Lite Preview for work measured by MMLU Pro or LegalBench (Vals AI), where it leads.

Which is cheaper, DeepSeek V4 Flash 0731 or Gemini 3.1 Flash Lite Preview?

DeepSeek V4 Flash 0731 costs $0.14 per million input tokens and $0.396 per million output tokens; Gemini 3.1 Flash Lite Preview costs $0.25 and $1.50. Per solved SWE-bench Verified task, DeepSeek V4 Flash 0731 costs $0.01 and Gemini 3.1 Flash Lite Preview $0.18.

Which has the bigger context window, DeepSeek V4 Flash 0731 or Gemini 3.1 Flash Lite Preview?

Neither: both take 1.05M tokens.

How many benchmarks is the DeepSeek V4 Flash 0731 vs Gemini 3.1 Flash Lite Preview comparison based on?

29 benchmarks have a result for both models as of October 22, 2026. DeepSeek V4 Flash 0731's coding index rests on 4 independent benchmarks and Gemini 3.1 Flash Lite Preview's on 3. Where only one model has a result, the page says so instead of naming a winner.

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<iframe src="https://llmbenchmark.ai/embed/compare/deepseek-v4-flash-0731-vs-gemini-3-1-flash-lite-preview" title="DeepSeek V4 Flash 0731 vs Gemini 3.1 Flash Lite Preview, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/deepseek-v4-flash-0731-vs-gemini-3-1-flash-lite-preview">LLMBenchmark.ai, DeepSeek V4 Flash 0731 vs Gemini 3.1 Flash Lite Preview</a></p>

DeepSeek V4 Flash 0731 or Gemini 3.1 Flash Lite Preview: which to pick

Which one for your work

Coding

Intelligence

Agentic work

Reasoning

Math

Knowledge

Web design

Long documents

Everyday cost

Cost per solved task

At a glance

Benchmark by benchmark

What each workload costs

Chat turn

Repository review

Agent loop

Specification differences

Questions

Compare next