DeepSeek V4 Pro 0813 vs Gemini 3.1 Flash Lite Preview

DeepSeek V4 Pro 0813 leads Gemini 3.1 Flash Lite Preview on coding, 56.1 to 22.7 on the Vibe Coding Index, and Gemini 3.1 Flash Lite Preview costs 1.3x less per output token ($1.50 vs $1.98 per million). Updated October 22, 2026; 49 benchmarks have a result for both.

Replace DeepSeek V4 Pro 0813 Replace Gemini 3.1 Flash Lite Preview

DeepSeek V4 Pro 0813DeepSeek

Coding: 56.1
Overall: 60.8
Output $/M: $1.98

Gemini 3.1 Flash Lite PreviewGoogle

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

vs boards won of 49 shared, 1 tied

DeepSeek V4 Pro 0813 or Gemini 3.1 Flash Lite Preview: which to pick

Pick DeepSeek V4 Pro 0813 for coding: it scores 56.1 on the Vibe Coding Index against 22.7 for Gemini 3.1 Flash Lite Preview.

Pick Gemini 3.1 Flash Lite Preview for output tokens 1.3x cheaper ($1.50 vs $1.98 per million) and work measured by LegalBench (Vals AI) or MedCode (Vals AI), where it leads.

Model ADeepSeek V4 Pro 0813DeepSeek56.1/1005 independent benchmarks$0.10 per solved task Model BGemini 3.1 Flash Lite PreviewGoogle22.7/1003 independent benchmarks$0.18 per solved task

492930

Shared results: 49
DeepSeek V4 Pro 0813 only: 29
Gemini 3.1 Flash Lite Preview only: 30
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 Pro 0813
DeepSeek V4 Pro 0813 scores 56.1 against 22.7.
5 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
DeepSeek V4 Pro 0813
DeepSeek V4 Pro 0813 leads, 36.0 against 15.6.
Same board, both measured
Agentic work
AA Agentic Index
DeepSeek V4 Pro 0813
DeepSeek V4 Pro 0813 leads, 41.3 against 1.6.
Same board, both measured
Reasoning
GPQA Diamond
DeepSeek V4 Pro 0813
DeepSeek V4 Pro 0813 leads, 92.4% 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
DeepSeek V4 Pro 0813
DeepSeek V4 Pro 0813 leads, 87.0% against 86.2%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Gemini 3.1 Flash Lite Preview has a Design Arena: websites result, 1082.
Directional only
General
Vals Index
No call
Only DeepSeek V4 Pro 0813 has a Vals Index result, 53.0%.
Directional only
Long documents
Listed context window
No call
Both take 1.05M tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Gemini 3.1 Flash Lite Preview
DeepSeek V4 Pro 0813 $0.0016, Gemini 3.1 Flash Lite Preview $0.0010 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
DeepSeek V4 Pro 0813
DeepSeek V4 Pro 0813 $0.10, Gemini 3.1 Flash Lite Preview $0.18.
Published attempt cost and pass rate

At a glance

Coding index: DeepSeek V4 Pro 0813 56.1 from 5 benchmarks, Gemini 3.1 Flash Lite Preview 22.7 from 3 benchmarks.
Widest category: Agentic work, 33.1 points apart on average over 5 shared benchmarks.
Widest single gap: Vibe Code Bench (Vals AI): DeepSeek V4 Pro 0813 82.3% against Gemini 3.1 Flash Lite Preview 0.0%, 82.3 points apart on a 0 to 100 scale.
Output price: DeepSeek V4 Pro 0813 $1.98 against Gemini 3.1 Flash Lite Preview $1.50 per million output tokens, 1.3x 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 Pro 0813	Gemini 3.1 Flash Lite Preview	Ties
Coding	12	0	1 tie
Intelligence	1	0
Agentic work	5	0
Reasoning	4	0
Math	2	0
Knowledge	7	2
General	15	0
All shared boards	46	2	1 tie

CodingLike-for-likeSix of these boards feed the Vibe Coding Index120

Coding benchmarks for DeepSeek V4 Pro 0813 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3.1 Flash Lite Preview	Leader
LMArena WebDev	1582	1257	DeepSeek V4 Pro 0813
AA Coding Index	68.8	34.7	DeepSeek V4 Pro 0813
LiveCodeBench (Vals AI)	87.5%	80.1%	DeepSeek V4 Pro 0813
SWE-bench Verified (Vals AI)	96.4%	62.8%	DeepSeek V4 Pro 0813
Terminal-Bench 4 (Vals AI)	14.1%	Not measured	Only DeepSeek V4 Pro 0813 measured
Vibe Code Bench (Vals AI)	82.3%	0.0%	DeepSeek V4 Pro 0813
Code migration (Vals AI)	41.5%	4.6%	DeepSeek V4 Pro 0813
ProgramBench (Vals AI)	0.0%	0.0%	Tie
IOI (Vals AI)	51.6%	Not measured	Only DeepSeek V4 Pro 0813 measured
Terminal-Bench 2.1 (Vals AI)	54.7%	34.1%	DeepSeek V4 Pro 0813
Vibe Code Bench 1-100 (Vals AI)	17.5%	Not measured	Only DeepSeek V4 Pro 0813 measured
SkillsBench (Vals AI)	53.8%	Not measured	Only DeepSeek V4 Pro 0813 measured
CyberBench (Vals AI)	72.9%	Not measured	Only DeepSeek V4 Pro 0813 measured
SciCode	51.0%	Not measured	Only DeepSeek V4 Pro 0813 measured
FrontierCode	28.5%	Not measured	Only DeepSeek V4 Pro 0813 measured
WeirdML	66.2%	Not measured	Only DeepSeek V4 Pro 0813 measured
ALE-Bench	1403.2	797.7	DeepSeek V4 Pro 0813
LMArena Text: coding	1469	1400	DeepSeek V4 Pro 0813
LMArena Text: software and IT	1462	1413	DeepSeek V4 Pro 0813
LMArena WebDev: React	1588	1245	DeepSeek V4 Pro 0813
LMArena WebDev: HTML	1566	1276	DeepSeek V4 Pro 0813
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 16 boards here

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

Intelligence benchmarks for DeepSeek V4 Pro 0813 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3.1 Flash Lite Preview	Leader
AA Intelligence Index	36.0	15.6	DeepSeek V4 Pro 0813
Epoch Capabilities Index	155.6	Not measured	Only DeepSeek V4 Pro 0813 measured

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

Agentic work benchmarks for DeepSeek V4 Pro 0813 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3.1 Flash Lite Preview	Leader
AA Agentic Index	41.3	1.6	DeepSeek V4 Pro 0813
SREBench (Vals AI)	1.9%	Not measured	Only DeepSeek V4 Pro 0813 measured
Finance Agent (Vals AI)	50.4%	30.0%	DeepSeek V4 Pro 0813
Tax Agent Bench (Vals AI)	26.8%	3.1%	DeepSeek V4 Pro 0813
Legal Research Bench (Vals AI)	40.9%	3.4%	DeepSeek V4 Pro 0813
Harvey's Legal Agent Benchmark (Vals AI)	10.8%	Not measured	Only DeepSeek V4 Pro 0813 measured
Excel Modeling Benchmark (Vals AI)	52.8%	8.6%	DeepSeek V4 Pro 0813
Terminal-Bench-Science (Vals AI)	4.3%	Not measured	Only DeepSeek V4 Pro 0813 measured
APEX-Agents	47.3%	Not measured	Only DeepSeek V4 Pro 0813 measured
Neither model has a result on the other 32 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index40

Reasoning benchmarks for DeepSeek V4 Pro 0813 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3.1 Flash Lite Preview	Leader
GPQA Diamond	92.4%	81.1%	DeepSeek V4 Pro 0813
MMMU Pro (Vals AI)	Not measured	82.5%	Only Gemini 3.1 Flash Lite Preview measured
GPQA Diamond (Artificial Analysis run)	92.8%	Not measured	Only DeepSeek V4 Pro 0813 measured
Humanity's Last Exam (Artificial Analysis run)	41.0%	Not measured	Only DeepSeek V4 Pro 0813 measured
GPQA Diamond (Epoch AI run)	91.7%	Not measured	Only DeepSeek V4 Pro 0813 measured
ARC-AGI	90.5%	Not measured	Only DeepSeek V4 Pro 0813 measured
ARC-AGI-2	61.3%	Not measured	Only DeepSeek V4 Pro 0813 measured
Chess puzzles	46.0%	Not measured	Only DeepSeek V4 Pro 0813 measured
Mystery game puzzles	43.0%	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: hard prompts	1458	1407	DeepSeek V4 Pro 0813
LMArena Text: expert	1459	1398	DeepSeek V4 Pro 0813
LMArena Text: hard prompts in English	1463	1403	DeepSeek V4 Pro 0813
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 8 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index20

Math benchmarks for DeepSeek V4 Pro 0813 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3.1 Flash Lite Preview	Leader
AIME	Not measured	83.3%	Only Gemini 3.1 Flash Lite Preview measured
OTIS Mock AIME	98.6%	Not measured	Only DeepSeek V4 Pro 0813 measured
FrontierMath, tiers 1 to 3	64.6%	Not measured	Only DeepSeek V4 Pro 0813 measured
FrontierMath, tier 4	26.8%	Not measured	Only DeepSeek V4 Pro 0813 measured
ProofBench	50.0%	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: math	1441	1428	DeepSeek V4 Pro 0813
LMArena Text: mathematical work	1443	1417	DeepSeek V4 Pro 0813
Neither model has a result on the other 6 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index72

Knowledge benchmarks for DeepSeek V4 Pro 0813 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3.1 Flash Lite Preview	Leader
MMLU Pro	87.0%	86.2%	DeepSeek V4 Pro 0813
LegalBench (Vals AI)	82.4%	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)	65.4%	59.4%	DeepSeek V4 Pro 0813
TaxEval (Vals AI)	73.1%	71.8%	DeepSeek V4 Pro 0813
MortgageTax (Vals AI)	Not measured	68.0%	Only Gemini 3.1 Flash Lite Preview measured
MedCode (Vals AI)	42.5%	47.6%	Gemini 3.1 Flash Lite Preview
SimpleQA Verified	52.9%	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: science	1457	1425	DeepSeek V4 Pro 0813
LMArena Text: medicine and healthcare	1446	1428	DeepSeek V4 Pro 0813
LMArena Text: legal and government	1459	1418	DeepSeek V4 Pro 0813
LMArena Text: business and finance	1442	1389	DeepSeek V4 Pro 0813
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 designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared

Web design benchmarks for DeepSeek V4 Pro 0813 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3.1 Flash Lite Preview	Leader
Design Arena: websites	Not measured	1082	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: UI components	Not measured	1069	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: game dev	Not measured	1029	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: data viz	Not measured	1045	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: 3D	Not measured	1047	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: all code categories	Not measured	1072	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: SVG	Not measured	1052	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: ASCII art	Not measured	1167	Only Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 1 board here

GeneralLike-for-likePublic boards, shown as published, kept out of the index150

General benchmarks for DeepSeek V4 Pro 0813 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3.1 Flash Lite Preview	Leader
Vals Index	53.0%	Not measured	Only DeepSeek V4 Pro 0813 measured
SAGE (Vals AI)	Not measured	49.5%	Only Gemini 3.1 Flash Lite Preview measured
MedScribe (Vals AI)	80.2%	63.9%	DeepSeek V4 Pro 0813
Vals Multimodal Index	Not measured	41.4%	Only Gemini 3.1 Flash Lite Preview measured
Long context reasoning (AA-LCR)	80.3%	Not measured	Only DeepSeek V4 Pro 0813 measured
DTBench	93.9%	Not measured	Only DeepSeek V4 Pro 0813 measured
LMCA	45.5%	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text	1446	1416	DeepSeek V4 Pro 0813
LMArena Text: instruction following	1448	1377	DeepSeek V4 Pro 0813
LMArena Text: creative writing	1439	1401	DeepSeek V4 Pro 0813
LMArena Vision	Not measured	1240	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: English	1457	1414	DeepSeek V4 Pro 0813
LMArena Text: non-English	1431	1410	DeepSeek V4 Pro 0813
LMArena Text: Chinese	1481	1460	DeepSeek V4 Pro 0813
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	1449	1392	DeepSeek V4 Pro 0813
LMArena Text: French	1446	1424	DeepSeek V4 Pro 0813
LMArena Text: Spanish	1435	1421	DeepSeek V4 Pro 0813
LMArena Text: Russian	1448	1420	DeepSeek V4 Pro 0813
LMArena Text: Polish	Not measured	1443	Only Gemini 3.1 Flash Lite Preview measured
LMArena Text: multi-turn	1454	1417	DeepSeek V4 Pro 0813
LMArena Text: longer queries	1458	1394	DeepSeek V4 Pro 0813
LMArena Text: writing and language	1443	1408	DeepSeek V4 Pro 0813
LMArena Text: entertainment and media	1424	1386	DeepSeek V4 Pro 0813
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 14 boards here

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

Image generation benchmarks for DeepSeek V4 Pro 0813 and Gemini 3.1 Flash Lite Preview
Benchmark	DeepSeek V4 Pro 0813	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 Pro 0813$0.0016Fits in one request

Gemini 3.1 Flash Lite Preview$0.0010Fits in one request

Gemini 3.1 Flash Lite Preview costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Pro 0813$0.039Fits in one request

Gemini 3.1 Flash Lite Preview$0.017Fits in one request

Gemini 3.1 Flash Lite Preview costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Pro 0813$0.152Fits in one request

Gemini 3.1 Flash Lite Preview$0.065Fits in one request

Gemini 3.1 Flash Lite Preview 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 Pro 0813 and Gemini 3.1 Flash Lite Preview
Specification	DeepSeek V4 Pro 0813	Google Gemini 3.1 Flash Lite Preview
Maker	DeepSeek	Google
Weights	Open weights	No public weights listed
Released	August 12, 2026	March 3, 2026
Context window	1.05M	1.05M
Input $/Mtok	$0.66	$0.25
Output $/Mtok	$1.98	$1.50
Coding index	56.1	22.7
Independent measurements behind it	5	3
Cost per solved task	$0.10	$0.18
Source	OpenRouter listing	OpenRouter listing

Questions

Is DeepSeek V4 Pro 0813 better than Gemini 3.1 Flash Lite Preview for coding?

Pick DeepSeek V4 Pro 0813 for coding: it scores 56.1 on the Vibe Coding Index against 22.7 for Gemini 3.1 Flash Lite Preview. Pick Gemini 3.1 Flash Lite Preview for output tokens 1.3x cheaper ($1.50 vs $1.98 per million) and work measured by LegalBench (Vals AI) or MedCode (Vals AI), where it leads.

Which is cheaper, DeepSeek V4 Pro 0813 or Gemini 3.1 Flash Lite Preview?

DeepSeek V4 Pro 0813 costs $0.66 per million input tokens and $1.98 per million output tokens; Gemini 3.1 Flash Lite Preview costs $0.25 and $1.50. Per solved SWE-bench Verified task, DeepSeek V4 Pro 0813 costs $0.10 and Gemini 3.1 Flash Lite Preview $0.18.

Which has the bigger context window, DeepSeek V4 Pro 0813 or Gemini 3.1 Flash Lite Preview?

Neither: both take 1.05M tokens.

How many benchmarks is the DeepSeek V4 Pro 0813 vs Gemini 3.1 Flash Lite Preview comparison based on?

49 benchmarks have a result for both models as of October 22, 2026. DeepSeek V4 Pro 0813's coding index rests on 5 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-pro-0813-vs-gemini-3-1-flash-lite-preview" title="DeepSeek V4 Pro 0813 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-pro-0813-vs-gemini-3-1-flash-lite-preview">LLMBenchmark.ai, DeepSeek V4 Pro 0813 vs Gemini 3.1 Flash Lite Preview</a></p>

DeepSeek V4 Pro 0813 or Gemini 3.1 Flash Lite Preview: which to pick

Which one for your work

Coding

Intelligence

Agentic work

Reasoning

Math

Knowledge

Web design

General

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