DeepSeek V4 Pro 0813 vs Gemini 3 Flash Preview

DeepSeek V4 Pro 0813 leads Gemini 3 Flash Preview on coding, 56.1 to 43.7 on the Vibe Coding Index, and DeepSeek V4 Pro 0813 costs 1.5x less per output token ($1.98 vs $3.00 per million). Updated October 22, 2026; 35 benchmarks have a result for both.

Replace DeepSeek V4 Pro 0813 Replace Gemini 3 Flash Preview

DeepSeek V4 Pro 0813DeepSeek

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

Gemini 3 Flash PreviewGoogle

Coding: 43.7
Overall: 55.0
Output $/M: $3.00

vs boards won of 35 shared, 1 tied

DeepSeek V4 Pro 0813 or Gemini 3 Flash Preview: which to pick

Pick DeepSeek V4 Pro 0813 for coding: it scores 56.1 on the Vibe Coding Index against 43.7 for Gemini 3 Flash Preview.

Pick Gemini 3 Flash Preview for work measured by MMLU Pro or LegalBench (Vals AI), where it leads.

Model ADeepSeek V4 Pro 0813DeepSeek56.1/1005 independent benchmarks$0.10 per solved task Model BGemini 3 Flash PreviewGoogle43.7/1002 independent benchmarks$0.37 per solved task

354336

Shared results: 35
DeepSeek V4 Pro 0813 only: 43
Gemini 3 Flash Preview only: 36
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 43.7.
5 and 2 benchmarks behind the scores
Intelligence
AA Intelligence Index
DeepSeek V4 Pro 0813
DeepSeek V4 Pro 0813 leads, 36.0 against 26.3.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only DeepSeek V4 Pro 0813 has a AA Agentic Index result, 41.3.
Directional only
Reasoning
GPQA Diamond
DeepSeek V4 Pro 0813
DeepSeek V4 Pro 0813 leads, 92.4% against 87.9%.
Same board, both measured
Math
AIME
No call
Only Gemini 3 Flash Preview has a AIME result, 95.6%.
Directional only
Knowledge
MMLU Pro
Gemini 3 Flash Preview
Gemini 3 Flash Preview leads, 88.6% against 87.0%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Gemini 3 Flash Preview has a Design Arena: websites result, 1196.
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
DeepSeek V4 Pro 0813
DeepSeek V4 Pro 0813 $0.0016, Gemini 3 Flash Preview $0.0020 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 Flash Preview $0.37.
Published attempt cost and pass rate

At a glance

Coding index: DeepSeek V4 Pro 0813 56.1 from 5 benchmarks, Gemini 3 Flash Preview 43.7 from 2 benchmarks.
Widest category: Agentic work, 18.0 points apart on average over 4 shared benchmarks.
Widest single gap: Vibe Code Bench (Vals AI): DeepSeek V4 Pro 0813 82.3% against Gemini 3 Flash Preview 20.2%, 62.1 points apart on a 0 to 100 scale.
Output price: DeepSeek V4 Pro 0813 $1.98 against Gemini 3 Flash Preview $3.00 per million output tokens, 1.5x 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 Flash Preview	Ties
Coding	7	0	1 tie
Intelligence	1	0
Agentic work	4	0
Reasoning	8	0
Math	4	0
Knowledge	0	6
General	4	0
All shared boards	28	6	1 tie

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

Coding benchmarks for DeepSeek V4 Pro 0813 and Gemini 3 Flash Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3 Flash Preview	Leader
SWE-bench Verified	Not measured	75.8%	Only Gemini 3 Flash Preview measured
LMArena WebDev	1582	Not measured	Only DeepSeek V4 Pro 0813 measured
AA Coding Index	68.8	Not measured	Only DeepSeek V4 Pro 0813 measured
LiveCodeBench (Vals AI)	87.5%	85.6%	DeepSeek V4 Pro 0813
SWE-bench Verified (Vals AI)	96.4%	75.0%	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%	20.2%	DeepSeek V4 Pro 0813
Code migration (Vals AI)	41.5%	6.4%	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%	53.9%	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
LiveCodeBench (Artificial Analysis run)	Not measured	90.8%	Only Gemini 3 Flash Preview measured
SciCode	51.0%	Not measured	Only DeepSeek V4 Pro 0813 measured
Terminal-Bench Hard (Artificial Analysis run)	Not measured	38.6%	Only Gemini 3 Flash Preview measured
Terminal-Bench	Not measured	64.3%	Only Gemini 3 Flash Preview measured
FrontierCode	28.5%	Not measured	Only DeepSeek V4 Pro 0813 measured
GSO-Bench	Not measured	9.8%	Only Gemini 3 Flash Preview measured
WeirdML	66.2%	61.6%	DeepSeek V4 Pro 0813
ALE-Bench	1403.2	1367.2	DeepSeek V4 Pro 0813
LMArena Text: coding	1469	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: software and IT	1462	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena WebDev: React	1588	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena WebDev: HTML	1566	Not measured	Only DeepSeek V4 Pro 0813 measured
SciCode	Not measured	12.7%	Only Gemini 3 Flash Preview measured
Neither model has a result on the other 12 boards here

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

Intelligence benchmarks for DeepSeek V4 Pro 0813 and Gemini 3 Flash Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3 Flash Preview	Leader
AA Intelligence Index	36.0	26.3	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 index40

Agentic work benchmarks for DeepSeek V4 Pro 0813 and Gemini 3 Flash Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3 Flash Preview	Leader
AA Agentic Index	41.3	Not measured	Only DeepSeek V4 Pro 0813 measured
Design Arena: agents building web apps	Not measured	1111	Only Gemini 3 Flash Preview measured
Design Arena: agents building full-stack apps	Not measured	1063	Only Gemini 3 Flash Preview measured
Design Arena: agents building mobile apps	Not measured	1090	Only Gemini 3 Flash Preview measured
Design Arena: agents building Android apps	Not measured	1051	Only Gemini 3 Flash Preview measured
Design Arena: agents building Godot games	Not measured	1161	Only Gemini 3 Flash Preview measured
Design Arena: PowerPoint slides	Not measured	1036	Only Gemini 3 Flash Preview measured
SREBench (Vals AI)	1.9%	Not measured	Only DeepSeek V4 Pro 0813 measured
Finance Agent (Vals AI)	50.4%	42.5%	DeepSeek V4 Pro 0813
Tax Agent Bench (Vals AI)	26.8%	11.8%	DeepSeek V4 Pro 0813
Legal Research Bench (Vals AI)	40.9%	18.3%	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%	26.0%	DeepSeek V4 Pro 0813
Terminal-Bench-Science (Vals AI)	4.3%	Not measured	Only DeepSeek V4 Pro 0813 measured
τ²-Bench Telecom	Not measured	80.4%	Only Gemini 3 Flash Preview measured
APEX-Agents	47.3%	Not measured	Only DeepSeek V4 Pro 0813 measured
BALROG	Not measured	48.1%	Only Gemini 3 Flash Preview measured
DeepResearch Bench	Not measured	49.8%	Only Gemini 3 Flash Preview measured
Vending-Bench 2	Not measured	$3,635	Only Gemini 3 Flash Preview measured
Neither model has a result on the other 22 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index80

Reasoning benchmarks for DeepSeek V4 Pro 0813 and Gemini 3 Flash Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3 Flash Preview	Leader
GPQA Diamond	92.4%	87.9%	DeepSeek V4 Pro 0813
MMMU Pro (Vals AI)	Not measured	87.6%	Only Gemini 3 Flash Preview measured
GPQA Diamond (Artificial Analysis run)	92.8%	89.8%	DeepSeek V4 Pro 0813
Humanity's Last Exam (Artificial Analysis run)	41.0%	36.6%	DeepSeek V4 Pro 0813
GPQA Diamond (Epoch AI run)	91.7%	89.4%	DeepSeek V4 Pro 0813
ARC-AGI	90.5%	84.7%	DeepSeek V4 Pro 0813
ARC-AGI-2	61.3%	33.6%	DeepSeek V4 Pro 0813
SimpleBench	Not measured	61.1%	Only Gemini 3 Flash Preview measured
Chess puzzles	46.0%	39.0%	DeepSeek V4 Pro 0813
Mystery game puzzles	43.0%	26.0%	DeepSeek V4 Pro 0813
VPCT	Not measured	72.6%	Only Gemini 3 Flash Preview measured
LMArena Text: hard prompts	1458	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: expert	1459	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: hard prompts in English	1463	Not measured	Only DeepSeek V4 Pro 0813 measured
Neither model has a result on the other 8 boards here

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

Math benchmarks for DeepSeek V4 Pro 0813 and Gemini 3 Flash Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3 Flash Preview	Leader
AIME	Not measured	95.6%	Only Gemini 3 Flash Preview measured
MGSM (Vals AI)	Not measured	93.3%	Only Gemini 3 Flash Preview measured
AA Math Index	Not measured	97.0	Only Gemini 3 Flash Preview measured
AIME 2025 (Artificial Analysis run)	Not measured	97.0%	Only Gemini 3 Flash Preview measured
OTIS Mock AIME	98.6%	95.6%	DeepSeek V4 Pro 0813
FrontierMath, tiers 1 to 3	64.6%	51.2%	DeepSeek V4 Pro 0813
FrontierMath, tier 4	26.8%	17.1%	DeepSeek V4 Pro 0813
ProofBench	50.0%	15.0%	DeepSeek V4 Pro 0813
LMArena Text: math	1441	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: mathematical work	1443	Not measured	Only DeepSeek V4 Pro 0813 measured
Neither model has a result on the other 3 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index06

Knowledge benchmarks for DeepSeek V4 Pro 0813 and Gemini 3 Flash Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3 Flash Preview	Leader
MMLU Pro	87.0%	88.6%	Gemini 3 Flash Preview
LegalBench (Vals AI)	82.4%	86.9%	Gemini 3 Flash Preview
CaseLaw (Vals AI)	Not measured	55.8%	Only Gemini 3 Flash Preview measured
CorpFin (Vals AI)	65.4%	66.4%	Gemini 3 Flash Preview
TaxEval (Vals AI)	73.1%	73.9%	Gemini 3 Flash Preview
MortgageTax (Vals AI)	Not measured	68.7%	Only Gemini 3 Flash Preview measured
MedQA (Vals AI)	Not measured	95.8%	Only Gemini 3 Flash Preview measured
MedCode (Vals AI)	42.5%	55.9%	Gemini 3 Flash Preview
MMLU Pro (Artificial Analysis run)	Not measured	89.0%	Only Gemini 3 Flash Preview measured
SimpleQA Verified	52.9%	66.8%	Gemini 3 Flash Preview
GeoBench	Not measured	88.0%	Only Gemini 3 Flash Preview measured
LMArena Text: science	1457	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: medicine and healthcare	1446	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: legal and government	1459	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: business and finance	1442	Not measured	Only DeepSeek V4 Pro 0813 measured
FACTS Benchmark Suite	Not measured	63.4%	Only Gemini 3 Flash Preview measured
Neither model has a result on the other 2 boards here

Web designDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared

Web design benchmarks for DeepSeek V4 Pro 0813 and Gemini 3 Flash Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3 Flash Preview	Leader
Design Arena: websites	Not measured	1196	Only Gemini 3 Flash Preview measured
Design Arena: game dev	Not measured	1166	Only Gemini 3 Flash Preview measured
Design Arena: 3D	Not measured	1183	Only Gemini 3 Flash Preview measured
Design Arena: all code categories	Not measured	1189	Only Gemini 3 Flash Preview measured
Neither model has a result on the other 5 boards here

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

General benchmarks for DeepSeek V4 Pro 0813 and Gemini 3 Flash Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3 Flash Preview	Leader
Vals Index	53.0%	Not measured	Only DeepSeek V4 Pro 0813 measured
SAGE (Vals AI)	Not measured	51.8%	Only Gemini 3 Flash Preview measured
MedScribe (Vals AI)	80.2%	69.9%	DeepSeek V4 Pro 0813
Vals Multimodal Index	Not measured	52.2%	Only Gemini 3 Flash Preview measured
IFBench	Not measured	78.0%	Only Gemini 3 Flash Preview measured
Long context reasoning (AA-LCR)	80.3%	78.0%	DeepSeek V4 Pro 0813
DTBench	93.9%	89.1%	DeepSeek V4 Pro 0813
LMCA	45.5%	43.1%	DeepSeek V4 Pro 0813
LMArena Text	1446	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: instruction following	1448	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: creative writing	1439	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: English	1457	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: non-English	1431	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: Chinese	1481	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: Korean	1449	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: French	1446	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: Spanish	1435	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: Russian	1448	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: multi-turn	1454	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: longer queries	1458	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: writing and language	1443	Not measured	Only DeepSeek V4 Pro 0813 measured
LMArena Text: entertainment and media	1424	Not measured	Only DeepSeek V4 Pro 0813 measured
Neither model has a result on the other 24 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 Flash Preview
Benchmark	DeepSeek V4 Pro 0813	Gemini 3 Flash 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 Flash Preview$0.0020Fits in one request

DeepSeek V4 Pro 0813 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Pro 0813$0.039Fits in one request

Gemini 3 Flash Preview$0.034Fits in one request

Gemini 3 Flash Preview costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Pro 0813$0.152Fits in one request

Gemini 3 Flash Preview$0.130Fits in one request

Gemini 3 Flash 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 Flash Preview
Specification	DeepSeek V4 Pro 0813	Google Gemini 3 Flash Preview
Maker	DeepSeek	Google
Weights	Open weights	No public weights listed
Released	August 12, 2026	December 17, 2025
Context window	1.05M	1.05M
Input $/Mtok	$0.66	$0.50
Output $/Mtok	$1.98	$3.00
Coding index	56.1	43.7
Independent measurements behind it	5	2
Cost per solved task	$0.10	$0.37
Source	OpenRouter listing	OpenRouter listing

Questions

Is DeepSeek V4 Pro 0813 better than Gemini 3 Flash Preview for coding?

Pick DeepSeek V4 Pro 0813 for coding: it scores 56.1 on the Vibe Coding Index against 43.7 for Gemini 3 Flash Preview. Pick Gemini 3 Flash Preview for work measured by MMLU Pro or LegalBench (Vals AI), where it leads.

Which is cheaper, DeepSeek V4 Pro 0813 or Gemini 3 Flash Preview?

DeepSeek V4 Pro 0813 costs $0.66 per million input tokens and $1.98 per million output tokens; Gemini 3 Flash Preview costs $0.50 and $3.00. Per solved SWE-bench Verified task, DeepSeek V4 Pro 0813 costs $0.10 and Gemini 3 Flash Preview $0.37.

Which has the bigger context window, DeepSeek V4 Pro 0813 or Gemini 3 Flash Preview?

Neither: both take 1.05M tokens.

How many benchmarks is the DeepSeek V4 Pro 0813 vs Gemini 3 Flash Preview comparison based on?

35 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 Flash Preview's on 2. Where only one model has a result, the page says so instead of naming a winner.

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<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-flash-preview">LLMBenchmark.ai, DeepSeek V4 Pro 0813 vs Gemini 3 Flash Preview</a></p>

DeepSeek V4 Pro 0813 or Gemini 3 Flash 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