Gemini 3 Flash Preview vs GPT-5.2

GPT-5.2 leads Gemini 3 Flash Preview on coding, 55.9 to 43.7 on the Vibe Coding Index, and Gemini 3 Flash Preview costs 4.7x less per output token ($3.00 vs $14.00 per million). Updated October 22, 2026; 59 benchmarks have a result for both.

Replace Gemini 3 Flash Preview Replace GPT-5.2

Gemini 3 Flash PreviewGoogle

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

GPT-5.2OpenAI

Coding: 55.9
Overall: 60.7
Output $/M: $14.00

vs boards won of 59 shared, 1 tied

Gemini 3 Flash Preview or GPT-5.2: which to pick

Pick GPT-5.2 for coding: it scores 55.9 on the Vibe Coding Index against 43.7 for Gemini 3 Flash Preview.

Pick Gemini 3 Flash Preview for output tokens 4.7x cheaper ($3.00 vs $14.00 per million) and a lower cost per solved task ($0.37 against $1.91).

Model AGemini 3 Flash PreviewGoogle43.7/1002 independent benchmarks$0.37 per solved task Model BGPT-5.2OpenAI55.9/1003 independent benchmarks$1.91 per solved task

591255

Shared results: 59
Gemini 3 Flash Preview only: 12
GPT-5.2 only: 55
Like-for-like categories: 8 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
GPT-5.2
GPT-5.2 scores 55.9 against 43.7.
2 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
GPT-5.2
GPT-5.2 leads, 30.4 against 26.3.
Same board, both measured
Reasoning
GPQA Diamond
GPT-5.2
GPT-5.2 leads, 91.7% against 87.9%.
Same board, both measured
Math
AIME
GPT-5.2
GPT-5.2 leads, 96.9% against 95.6%.
Same board, both measured
Knowledge
MMLU Pro
Gemini 3 Flash Preview
Gemini 3 Flash Preview leads, 88.6% against 86.2%.
Same board, both measured
Web design
Design Arena: websites
Gemini 3 Flash Preview
Gemini 3 Flash Preview leads, 1196 against 1195.
Same board, both measured
Long documents
Listed context window
Gemini 3 Flash Preview
Gemini 3 Flash Preview takes 1.05M tokens against 400K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Gemini 3 Flash Preview
Gemini 3 Flash Preview $0.0020, GPT-5.2 $0.0088 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Gemini 3 Flash Preview
Gemini 3 Flash Preview $0.37, GPT-5.2 $1.91.
Published attempt cost and pass rate

At a glance

Coding index: Gemini 3 Flash Preview 43.7 from 2 benchmarks, GPT-5.2 55.9 from 3 benchmarks.
Widest category: Coding, 7.8 points apart on average over 10 shared benchmarks.
Widest single gap: Vibe Code Bench (Vals AI): Gemini 3 Flash Preview 20.2% against GPT-5.2 53.5%, 33.3 points apart on a 0 to 100 scale.
Output price: Gemini 3 Flash Preview $3.00 against GPT-5.2 $14.00 per million output tokens, 4.7x apart.
Context window: Gemini 3 Flash Preview takes 1.05M tokens, GPT-5.2 400K.

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	Gemini 3 Flash Preview	GPT-5.2	Ties
Coding	4	6
Intelligence	0	1
Agentic work	5	3
Reasoning	3	8
Math	0	7	1 tie
Knowledge	9	2
Web design	3	1
General	2	4
All shared boards	26	32	1 tie

CodingLike-for-likeSix of these boards feed the Vibe Coding Index46

Coding benchmarks for Gemini 3 Flash Preview and GPT-5.2
Benchmark	Gemini 3 Flash Preview	GPT-5.2	Leader
SWE-bench Verified	75.8%	72.8%	Gemini 3 Flash Preview
SWE-bench Multilingual	Not measured	66.7%	Only GPT-5.2 measured
LMArena WebDev	Not measured	1417	Only GPT-5.2 measured
LiveCodeBench (Vals AI)	85.6%	85.4%	Gemini 3 Flash Preview
SWE-bench Verified (Vals AI)	75.0%	75.8%	GPT-5.2
Vibe Code Bench (Vals AI)	20.2%	53.5%	GPT-5.2
Code migration (Vals AI)	6.4%	Not measured	Only Gemini 3 Flash Preview measured
ProgramBench (Vals AI)	0.0%	Not measured	Only Gemini 3 Flash Preview measured
Terminal-Bench 2.1 (Vals AI)	53.9%	Not measured	Only Gemini 3 Flash Preview measured
LiveCodeBench (Artificial Analysis run)	90.8%	89.4%	Gemini 3 Flash Preview
Terminal-Bench Hard (Artificial Analysis run)	38.6%	47.0%	GPT-5.2
Terminal-Bench	64.3%	64.9%	GPT-5.2
GSO-Bench	9.8%	27.5%	GPT-5.2
WeirdML	61.6%	72.2%	GPT-5.2
ALE-Bench	1367.2	1293.5	Gemini 3 Flash Preview
LMArena Text: coding	Not measured	1442	Only GPT-5.2 measured
LMArena Text: software and IT	Not measured	1434	Only GPT-5.2 measured
LMArena WebDev: HTML	Not measured	1427	Only GPT-5.2 measured
SciCode	12.7%	Not measured	Only Gemini 3 Flash Preview measured
Neither model has a result on the other 20 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01

Intelligence benchmarks for Gemini 3 Flash Preview and GPT-5.2
Benchmark	Gemini 3 Flash Preview	GPT-5.2	Leader
AA Intelligence Index	26.3	30.4	GPT-5.2
Epoch Capabilities Index	Not measured	153.7	Only GPT-5.2 measured

Agentic workLike-for-likePublic boards, shown as published, kept out of the index53

Agentic work benchmarks for Gemini 3 Flash Preview and GPT-5.2
Benchmark	Gemini 3 Flash Preview	GPT-5.2	Leader
Design Arena: agents building web apps	1111	1086	Gemini 3 Flash Preview
Design Arena: agents building full-stack apps	1063	1043	Gemini 3 Flash Preview
Design Arena: agents building mobile apps	1090	1093	GPT-5.2
Design Arena: agents building Android apps	1051	1059	GPT-5.2
Design Arena: agents building Godot games	1161	1142	Gemini 3 Flash Preview
Design Arena: PowerPoint slides	1036	Not measured	Only Gemini 3 Flash Preview measured
Finance Agent (Vals AI)	42.5%	Not measured	Only Gemini 3 Flash Preview measured
Tax Agent Bench (Vals AI)	11.8%	Not measured	Only Gemini 3 Flash Preview measured
Legal Research Bench (Vals AI)	18.3%	Not measured	Only Gemini 3 Flash Preview measured
Excel Modeling Benchmark (Vals AI)	26.0%	Not measured	Only Gemini 3 Flash Preview measured
τ²-Bench Telecom	80.4%	84.8%	GPT-5.2
METR time horizons	Not measured	75.3%	Only GPT-5.2 measured
Remote Labor Index	Not measured	2.5%	Only GPT-5.2 measured
GDPval	Not measured	49.7%	Only GPT-5.2 measured
BALROG	48.1%	Not measured	Only Gemini 3 Flash Preview measured
DeepResearch Bench	49.8%	41.1%	Gemini 3 Flash Preview
Vending-Bench 2	$3,635	$3,591	Gemini 3 Flash Preview
Berkeley Function Calling Leaderboard (BFCL)	Not measured	55.9%	Only GPT-5.2 measured
Neither model has a result on the other 23 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index38

Reasoning benchmarks for Gemini 3 Flash Preview and GPT-5.2
Benchmark	Gemini 3 Flash Preview	GPT-5.2	Leader
GPQA Diamond	87.9%	91.7%	GPT-5.2
MMMU Pro (Vals AI)	87.6%	86.7%	Gemini 3 Flash Preview
GPQA Diamond (Artificial Analysis run)	89.8%	90.3%	GPT-5.2
Humanity's Last Exam (Artificial Analysis run)	36.6%	37.7%	GPT-5.2
GPQA Diamond (Epoch AI run)	89.4%	91.4%	GPT-5.2
ARC-AGI	84.7%	86.2%	GPT-5.2
ARC-AGI-2	33.6%	52.9%	GPT-5.2
SimpleBench	61.1%	45.8%	Gemini 3 Flash Preview
Chess puzzles	39.0%	48.0%	GPT-5.2
Mystery game puzzles	26.0%	23.0%	Gemini 3 Flash Preview
EBR-bench	Not measured	23.0%	Only GPT-5.2 measured
VPCT	72.6%	84.0%	GPT-5.2
LMArena Text: hard prompts	Not measured	1428	Only GPT-5.2 measured
LMArena Text: expert	Not measured	1445	Only GPT-5.2 measured
LMArena Text: hard prompts in English	Not measured	1431	Only GPT-5.2 measured
LMArena Vision: diagrams	Not measured	1265	Only GPT-5.2 measured
LMArena Vision: homework	Not measured	1276	Only GPT-5.2 measured
Kagi LLM Benchmark	Not measured	73.3%	Only GPT-5.2 measured
Neither model has a result on the other 4 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index07

Math benchmarks for Gemini 3 Flash Preview and GPT-5.2
Benchmark	Gemini 3 Flash Preview	GPT-5.2	Leader
AIME	95.6%	96.9%	GPT-5.2
MGSM (Vals AI)	93.3%	94.0%	GPT-5.2
AA Math Index	97.0	99.0	GPT-5.2
AIME 2025 (Artificial Analysis run)	97.0%	99.0%	GPT-5.2
OTIS Mock AIME	95.6%	96.1%	GPT-5.2
FrontierMath, tiers 1 to 3	51.2%	67.4%	GPT-5.2
FrontierMath, tier 4	17.1%	31.7%	GPT-5.2
ProofBench	15.0%	15.0%	Tie
LMArena Text: math	Not measured	1440	Only GPT-5.2 measured
LMArena Text: mathematical work	Not measured	1442	Only GPT-5.2 measured
Neither model has a result on the other 3 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index92

Knowledge benchmarks for Gemini 3 Flash Preview and GPT-5.2
Benchmark	Gemini 3 Flash Preview	GPT-5.2	Leader
MMLU Pro	88.6%	86.2%	Gemini 3 Flash Preview
LegalBench (Vals AI)	86.9%	82.8%	Gemini 3 Flash Preview
CaseLaw (Vals AI)	55.8%	66.0%	GPT-5.2
CorpFin (Vals AI)	66.4%	65.9%	Gemini 3 Flash Preview
TaxEval (Vals AI)	73.9%	75.8%	GPT-5.2
MortgageTax (Vals AI)	68.7%	67.1%	Gemini 3 Flash Preview
MedQA (Vals AI)	95.8%	94.1%	Gemini 3 Flash Preview
MedCode (Vals AI)	55.9%	49.8%	Gemini 3 Flash Preview
MMLU Pro (Artificial Analysis run)	89.0%	87.4%	Gemini 3 Flash Preview
SimpleQA Verified	66.8%	37.1%	Gemini 3 Flash Preview
GeoBench	88.0%	Not measured	Only Gemini 3 Flash Preview measured
LMArena Text: science	Not measured	1425	Only GPT-5.2 measured
LMArena Text: medicine and healthcare	Not measured	1425	Only GPT-5.2 measured
LMArena Text: legal and government	Not measured	1427	Only GPT-5.2 measured
LMArena Text: business and finance	Not measured	1414	Only GPT-5.2 measured
FACTS Benchmark Suite	63.4%	48.5%	Gemini 3 Flash Preview
Neither model has a result on the other 2 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index31

Web design benchmarks for Gemini 3 Flash Preview and GPT-5.2
Benchmark	Gemini 3 Flash Preview	GPT-5.2	Leader
Design Arena: websites	1196	1195	Gemini 3 Flash Preview
Design Arena: UI components	Not measured	1190	Only GPT-5.2 measured
Design Arena: game dev	1166	1195	GPT-5.2
Design Arena: data viz	Not measured	1202	Only GPT-5.2 measured
Design Arena: 3D	1183	1079	Gemini 3 Flash Preview
Design Arena: all code categories	1189	1170	Gemini 3 Flash Preview
Design Arena: SVG	Not measured	1139	Only GPT-5.2 measured
Design Arena: ASCII art	Not measured	1152	Only GPT-5.2 measured
Neither model has a result on the other 1 board here

GeneralLike-for-likePublic boards, shown as published, kept out of the index24

General benchmarks for Gemini 3 Flash Preview and GPT-5.2
Benchmark	Gemini 3 Flash Preview	GPT-5.2	Leader
SAGE (Vals AI)	51.8%	49.3%	Gemini 3 Flash Preview
MedScribe (Vals AI)	69.9%	84.4%	GPT-5.2
Vals Multimodal Index	52.2%	Not measured	Only Gemini 3 Flash Preview measured
IFBench	78.0%	75.4%	Gemini 3 Flash Preview
Long context reasoning (AA-LCR)	78.0%	82.7%	GPT-5.2
DTBench	89.1%	90.9%	GPT-5.2
LMCA	43.1%	43.9%	GPT-5.2
CL-bench	Not measured	18.2%	Only GPT-5.2 measured
Furniture assembly	Not measured	38.3%	Only GPT-5.2 measured
LMArena Text	Not measured	1416	Only GPT-5.2 measured
LMArena Text: instruction following	Not measured	1409	Only GPT-5.2 measured
LMArena Text: creative writing	Not measured	1376	Only GPT-5.2 measured
LMArena Vision	Not measured	1246	Only GPT-5.2 measured
LMArena Text: English	Not measured	1422	Only GPT-5.2 measured
LMArena Text: non-English	Not measured	1405	Only GPT-5.2 measured
LMArena Text: Chinese	Not measured	1447	Only GPT-5.2 measured
LMArena Text: German	Not measured	1444	Only GPT-5.2 measured
LMArena Text: Japanese	Not measured	1420	Only GPT-5.2 measured
LMArena Text: Korean	Not measured	1374	Only GPT-5.2 measured
LMArena Text: French	Not measured	1454	Only GPT-5.2 measured
LMArena Text: Spanish	Not measured	1413	Only GPT-5.2 measured
LMArena Text: Russian	Not measured	1415	Only GPT-5.2 measured
LMArena Text: Polish	Not measured	1426	Only GPT-5.2 measured
LMArena Text: multi-turn	Not measured	1419	Only GPT-5.2 measured
LMArena Text: longer queries	Not measured	1413	Only GPT-5.2 measured
LMArena Text: writing and language	Not measured	1392	Only GPT-5.2 measured
LMArena Text: entertainment and media	Not measured	1378	Only GPT-5.2 measured
LMArena Vision: English	Not measured	1243	Only GPT-5.2 measured
LMArena Vision: Chinese	Not measured	1305	Only GPT-5.2 measured
LMArena Vision: reading text	Not measured	1257	Only GPT-5.2 measured
LMArena Vision: humor	Not measured	1227	Only GPT-5.2 measured
LMArena Vision: captioning	Not measured	1267	Only GPT-5.2 measured
LMArena Vision: recognizing things	Not measured	1232	Only GPT-5.2 measured
LMArena Vision: creative writing	Not measured	1225	Only GPT-5.2 measured
LMArena Document	Not measured	1405	Only GPT-5.2 measured
Neither model has a result on the other 11 boards here

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

Image generation benchmarks for Gemini 3 Flash Preview and GPT-5.2
Benchmark	Gemini 3 Flash Preview	GPT-5.2	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

Gemini 3 Flash Preview$0.0020Fits in one request

GPT-5.2$0.0088Fits in one request

Gemini 3 Flash Preview costs less

Repository review

50K input + 3K output tokens

Gemini 3 Flash Preview$0.034Fits in one request

GPT-5.2$0.130Fits in one request

Gemini 3 Flash Preview costs less

Agent loop

200K input + 10K output tokens

Gemini 3 Flash Preview$0.130Fits in one request

GPT-5.2$0.490Fits 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 Gemini 3 Flash Preview and GPT-5.2
Specification	Google Gemini 3 Flash Preview	OpenAI GPT-5.2
Maker	Google	OpenAI
Weights	No public weights listed	No public weights listed
Released	December 17, 2025	December 10, 2025
Context window	1.05M	400K
Input $/Mtok	$0.50	$1.75
Output $/Mtok	$3.00	$14.00
Coding index	43.7	55.9
Independent measurements behind it	2	3
Cost per solved task	$0.37	$1.91
Source	OpenRouter listing	OpenRouter listing

Questions

Is Gemini 3 Flash Preview better than GPT-5.2 for coding?

Pick GPT-5.2 for coding: it scores 55.9 on the Vibe Coding Index against 43.7 for Gemini 3 Flash Preview. Pick Gemini 3 Flash Preview for output tokens 4.7x cheaper ($3.00 vs $14.00 per million) and a lower cost per solved task ($0.37 against $1.91).

Which is cheaper, Gemini 3 Flash Preview or GPT-5.2?

Gemini 3 Flash Preview costs $0.50 per million input tokens and $3.00 per million output tokens; GPT-5.2 costs $1.75 and $14.00. Per solved SWE-bench Verified task, Gemini 3 Flash Preview costs $0.37 and GPT-5.2 $1.91.

Which has the bigger context window, Gemini 3 Flash Preview or GPT-5.2?

Gemini 3 Flash Preview, with 1.05M tokens against 400K.

How many benchmarks is the Gemini 3 Flash Preview vs GPT-5.2 comparison based on?

59 benchmarks have a result for both models as of October 22, 2026. Gemini 3 Flash Preview's coding index rests on 2 independent benchmarks and GPT-5.2's on 3. Where only one model has a result, the page says so instead of naming a winner.

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Gemini 3 Flash Preview or GPT-5.2: which to pick

Which one for your work

Coding

Intelligence

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