Gemini 3.1 Flash Lite Preview vs GPT-5.4 Mini

GPT-5.4 Mini leads Gemini 3.1 Flash Lite Preview on coding, 35.8 to 22.7 on the Vibe Coding Index, and Gemini 3.1 Flash Lite Preview costs 3.0x less per output token ($1.50 vs $4.50 per million). Updated October 21, 2026; 64 benchmarks have a result for both.

Replace Gemini 3.1 Flash Lite Preview Replace GPT-5.4 Mini

Gemini 3.1 Flash Lite PreviewGoogle

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

GPT-5.4 MiniOpenAI

Coding: 35.8
Overall: 44.0
Output $/M: $4.50

vs boards won of 64 shared, 1 tied

Gemini 3.1 Flash Lite Preview or GPT-5.4 Mini: which to pick

Pick GPT-5.4 Mini for coding: it scores 35.8 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 3.0x cheaper ($1.50 vs $4.50 per million) and a lower cost per solved task ($0.18 against $0.70).

Model AGemini 3.1 Flash Lite PreviewGoogle22.7/1003 independent benchmarks$0.18 per solved task Model BGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved task

641525

Shared results: 64
Gemini 3.1 Flash Lite Preview only: 15
GPT-5.4 Mini only: 25
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
GPT-5.4 Mini
GPT-5.4 Mini scores 35.8 against 22.7.
3 and 5 benchmarks behind the scores
Intelligence
AA Intelligence Index
GPT-5.4 Mini
GPT-5.4 Mini leads, 24.1 against 15.6.
Same board, both measured
Agentic work
AA Agentic Index
GPT-5.4 Mini
GPT-5.4 Mini leads, 17.9 against 1.6.
Same board, both measured
Reasoning
GPQA Diamond
GPT-5.4 Mini
GPT-5.4 Mini leads, 83.1% against 81.1%.
Same board, both measured
Math
AIME
GPT-5.4 Mini
GPT-5.4 Mini leads, 95.6% against 83.3%.
Same board, both measured
Knowledge
MMLU Pro
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview leads, 86.2% against 84.5%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Gemini 3.1 Flash Lite Preview has a Design Arena: websites result, 1083.
Directional only
Long documents
Listed context window
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview takes 1.05M tokens against 400K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview $0.0010, GPT-5.4 Mini $0.0030 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview $0.18, GPT-5.4 Mini $0.70.
Published attempt cost and pass rate

At a glance

Coding index: Gemini 3.1 Flash Lite Preview 22.7 from 3 benchmarks, GPT-5.4 Mini 35.8 from 5 benchmarks.
Widest category: Agentic work, 16.7 points apart on average over 5 shared benchmarks.
Widest single gap: Vibe Code Bench (Vals AI): Gemini 3.1 Flash Lite Preview 0.0% against GPT-5.4 Mini 48.0%, 48.0 points apart on a 0 to 100 scale.
Output price: Gemini 3.1 Flash Lite Preview $1.50 against GPT-5.4 Mini $4.50 per million output tokens, 3.0x apart.
Context window: Gemini 3.1 Flash Lite Preview takes 1.05M tokens, GPT-5.4 Mini 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 3.1 Flash Lite Preview	GPT-5.4 Mini	Ties
Coding	0	12	1 tie
Intelligence	0	1
Agentic work	0	5
Reasoning	1	6
Math	1	2
Knowledge	7	2
General	16	10
All shared boards	25	38	1 tie

CodingLike-for-likeSix of these boards feed the Vibe Coding Index012

Coding benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Benchmark	Gemini 3.1 Flash Lite Preview	GPT-5.4 Mini	Leader
LMArena WebDev	1257	1397	GPT-5.4 Mini
AA Coding Index	34.7	56.1	GPT-5.4 Mini
LiveCodeBench (Vals AI)	80.1%	81.5%	GPT-5.4 Mini
SWE-bench Verified (Vals AI)	62.8%	73.0%	GPT-5.4 Mini
Terminal-Bench 4 (Vals AI)	Not measured	2.5%	Only GPT-5.4 Mini measured
Vibe Code Bench (Vals AI)	0.0%	48.0%	GPT-5.4 Mini
Code migration (Vals AI)	4.6%	12.9%	GPT-5.4 Mini
ProgramBench (Vals AI)	0.0%	0.0%	Tie
Terminal-Bench 2.1 (Vals AI)	34.1%	54.7%	GPT-5.4 Mini
SciCode	Not measured	52.1%	Only GPT-5.4 Mini measured
Terminal-Bench Hard (Artificial Analysis run)	Not measured	52.3%	Only GPT-5.4 Mini measured
FrontierCode	Not measured	27.0%	Only GPT-5.4 Mini measured
WeirdML	Not measured	60.3%	Only GPT-5.4 Mini measured
ALE-Bench	797.7	1188.6	GPT-5.4 Mini
LMArena Text: coding	1400	1438	GPT-5.4 Mini
LMArena Text: software and IT	1413	1436	GPT-5.4 Mini
LMArena WebDev: React	1245	1386	GPT-5.4 Mini
LMArena WebDev: HTML	1276	1419	GPT-5.4 Mini
LMArena WebDev: from an image	1336	Not measured	Only Gemini 3.1 Flash Lite Preview measured
SciCode	4.6%	Not measured	Only Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 19 boards here

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

Intelligence benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Benchmark	Gemini 3.1 Flash Lite Preview	GPT-5.4 Mini	Leader
AA Intelligence Index	15.6	24.1	GPT-5.4 Mini
Epoch Capabilities Index	Not measured	148.7	Only GPT-5.4 Mini measured

Agentic workLike-for-likePublic boards, shown as published, kept out of the index05

Agentic work benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Benchmark	Gemini 3.1 Flash Lite Preview	GPT-5.4 Mini	Leader
AA Agentic Index	1.6	17.9	GPT-5.4 Mini
Finance Agent (Vals AI)	30.0%	45.4%	GPT-5.4 Mini
Tax Agent Bench (Vals AI)	3.1%	8.8%	GPT-5.4 Mini
Legal Research Bench (Vals AI)	3.4%	12.5%	GPT-5.4 Mini
Excel Modeling Benchmark (Vals AI)	8.6%	45.4%	GPT-5.4 Mini
τ²-Bench Telecom	Not measured	83.3%	Only GPT-5.4 Mini measured
DeepResearch Bench	Not measured	36.3%	Only GPT-5.4 Mini measured
Neither model has a result on the other 34 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index16

Reasoning benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Benchmark	Gemini 3.1 Flash Lite Preview	GPT-5.4 Mini	Leader
GPQA Diamond	81.1%	83.1%	GPT-5.4 Mini
MMMU Pro (Vals AI)	82.5%	79.3%	Gemini 3.1 Flash Lite Preview
GPQA Diamond (Artificial Analysis run)	Not measured	87.5%	Only GPT-5.4 Mini measured
Humanity's Last Exam (Artificial Analysis run)	Not measured	28.1%	Only GPT-5.4 Mini measured
GPQA Diamond (Epoch AI run)	Not measured	86.9%	Only GPT-5.4 Mini measured
ARC-AGI	Not measured	63.7%	Only GPT-5.4 Mini measured
ARC-AGI-2	Not measured	18.9%	Only GPT-5.4 Mini measured
Chess puzzles	Not measured	23.0%	Only GPT-5.4 Mini measured
Mystery game puzzles	Not measured	11.0%	Only GPT-5.4 Mini measured
LMArena Text: hard prompts	1407	1424	GPT-5.4 Mini
LMArena Text: expert	1398	1435	GPT-5.4 Mini
LMArena Text: hard prompts in English	1403	1420	GPT-5.4 Mini
LMArena Vision: diagrams	1242	1266	GPT-5.4 Mini
LMArena Vision: homework	1271	1285	GPT-5.4 Mini
Kagi LLM Benchmark	Not measured	37.9%	Only GPT-5.4 Mini measured
Neither model has a result on the other 7 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index12

Math benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Benchmark	Gemini 3.1 Flash Lite Preview	GPT-5.4 Mini	Leader
AIME	83.3%	95.6%	GPT-5.4 Mini
OTIS Mock AIME	Not measured	88.9%	Only GPT-5.4 Mini measured
FrontierMath, tiers 1 to 3	Not measured	51.2%	Only GPT-5.4 Mini measured
FrontierMath, tier 4	Not measured	9.8%	Only GPT-5.4 Mini measured
ProofBench	Not measured	21.0%	Only GPT-5.4 Mini measured
LMArena Text: math	1428	1418	Gemini 3.1 Flash Lite Preview
LMArena Text: mathematical work	1417	1429	GPT-5.4 Mini
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 Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Benchmark	Gemini 3.1 Flash Lite Preview	GPT-5.4 Mini	Leader
MMLU Pro	86.2%	84.5%	Gemini 3.1 Flash Lite Preview
LegalBench (Vals AI)	83.8%	Not measured	Only Gemini 3.1 Flash Lite Preview measured
CaseLaw (Vals AI)	55.0%	51.7%	Gemini 3.1 Flash Lite Preview
CorpFin (Vals AI)	59.4%	60.9%	GPT-5.4 Mini
TaxEval (Vals AI)	71.8%	71.2%	Gemini 3.1 Flash Lite Preview
MortgageTax (Vals AI)	68.0%	63.5%	Gemini 3.1 Flash Lite Preview
MedCode (Vals AI)	47.6%	Not measured	Only Gemini 3.1 Flash Lite Preview measured
SimpleQA Verified	Not measured	29.4%	Only GPT-5.4 Mini measured
LMArena Text: science	1425	1417	Gemini 3.1 Flash Lite Preview
LMArena Text: medicine and healthcare	1428	1395	Gemini 3.1 Flash Lite Preview
LMArena Text: legal and government	1418	1414	Gemini 3.1 Flash Lite Preview
LMArena Text: business and finance	1389	1418	GPT-5.4 Mini
FACTS Benchmark Suite	51.4%	Not measured	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 Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Benchmark	Gemini 3.1 Flash Lite Preview	GPT-5.4 Mini	Leader
Design Arena: websites	1083	Not measured	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: UI components	1072	Not measured	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: game dev	1029	Not measured	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: data viz	1045	Not measured	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: 3D	1048	Not measured	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: all code categories	1072	Not measured	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: SVG	1052	Not measured	Only Gemini 3.1 Flash Lite Preview measured
Design Arena: ASCII art	1167	Not measured	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 index1610

General benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Benchmark	Gemini 3.1 Flash Lite Preview	GPT-5.4 Mini	Leader
SAGE (Vals AI)	49.5%	50.8%	GPT-5.4 Mini
MedScribe (Vals AI)	63.9%	Not measured	Only Gemini 3.1 Flash Lite Preview measured
Vals Multimodal Index	41.4%	54.2%	GPT-5.4 Mini
IFBench	Not measured	73.3%	Only GPT-5.4 Mini measured
Long context reasoning (AA-LCR)	Not measured	77.0%	Only GPT-5.4 Mini measured
DTBench	Not measured	80.0%	Only GPT-5.4 Mini measured
LMCA	Not measured	40.8%	Only GPT-5.4 Mini measured
LMArena Text	1416	1412	Gemini 3.1 Flash Lite Preview
LMArena Text: instruction following	1377	1405	GPT-5.4 Mini
LMArena Text: creative writing	1401	1370	Gemini 3.1 Flash Lite Preview
LMArena Vision	1240	1245	GPT-5.4 Mini
LMArena Text: English	1414	1412	Gemini 3.1 Flash Lite Preview
LMArena Text: non-English	1410	1405	Gemini 3.1 Flash Lite Preview
LMArena Text: Chinese	1460	1446	Gemini 3.1 Flash Lite Preview
LMArena Text: German	1430	1408	Gemini 3.1 Flash Lite Preview
LMArena Text: Japanese	1413	1375	Gemini 3.1 Flash Lite Preview
LMArena Text: Korean	1392	1370	Gemini 3.1 Flash Lite Preview
LMArena Text: French	1424	1441	GPT-5.4 Mini
LMArena Text: Spanish	1421	1405	Gemini 3.1 Flash Lite Preview
LMArena Text: Russian	1420	1417	Gemini 3.1 Flash Lite Preview
LMArena Text: Polish	1443	1415	Gemini 3.1 Flash Lite Preview
LMArena Text: multi-turn	1417	1429	GPT-5.4 Mini
LMArena Text: longer queries	1394	1408	GPT-5.4 Mini
LMArena Text: writing and language	1408	1393	Gemini 3.1 Flash Lite Preview
LMArena Text: entertainment and media	1386	1373	Gemini 3.1 Flash Lite Preview
LMArena Vision: English	1232	1244	GPT-5.4 Mini
LMArena Vision: Chinese	1278	1286	GPT-5.4 Mini
LMArena Vision: reading text	1246	1253	GPT-5.4 Mini
LMArena Vision: humor	1266	1235	Gemini 3.1 Flash Lite Preview
LMArena Vision: captioning	1259	Not measured	Only Gemini 3.1 Flash Lite Preview measured
LMArena Vision: recognizing things	1308	1218	Gemini 3.1 Flash Lite Preview
LMArena Vision: creative writing	1248	1222	Gemini 3.1 Flash Lite Preview
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 Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Benchmark	Gemini 3.1 Flash Lite Preview	GPT-5.4 Mini	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 3.1 Flash Lite Preview$0.0010Fits in one request

GPT-5.4 Mini$0.0030Fits in one request

Gemini 3.1 Flash Lite Preview costs less

Repository review

50K input + 3K output tokens

Gemini 3.1 Flash Lite Preview$0.017Fits in one request

GPT-5.4 Mini$0.051Fits in one request

Gemini 3.1 Flash Lite Preview costs less

Agent loop

200K input + 10K output tokens

Gemini 3.1 Flash Lite Preview$0.065Fits in one request

GPT-5.4 Mini$0.195Fits 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 Gemini 3.1 Flash Lite Preview and GPT-5.4 Mini
Specification	Google Gemini 3.1 Flash Lite Preview	OpenAI GPT-5.4 Mini
Maker	Google	OpenAI
Weights	No public weights listed	No public weights listed
Released	March 3, 2026	March 17, 2026
Context window	1.05M	400K
Input $/Mtok	$0.25	$0.75
Output $/Mtok	$1.50	$4.50
Coding index	22.7	35.8
Independent measurements behind it	3	5
Cost per solved task	$0.18	$0.70
Source	OpenRouter listing	OpenRouter listing

Questions

Is Gemini 3.1 Flash Lite Preview better than GPT-5.4 Mini for coding?

Pick GPT-5.4 Mini for coding: it scores 35.8 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 3.0x cheaper ($1.50 vs $4.50 per million) and a lower cost per solved task ($0.18 against $0.70).

Which is cheaper, Gemini 3.1 Flash Lite Preview or GPT-5.4 Mini?

Gemini 3.1 Flash Lite Preview costs $0.25 per million input tokens and $1.50 per million output tokens; GPT-5.4 Mini costs $0.75 and $4.50. Per solved SWE-bench Verified task, Gemini 3.1 Flash Lite Preview costs $0.18 and GPT-5.4 Mini $0.70.

Which has the bigger context window, Gemini 3.1 Flash Lite Preview or GPT-5.4 Mini?

Gemini 3.1 Flash Lite Preview, with 1.05M tokens against 400K.

How many benchmarks is the Gemini 3.1 Flash Lite Preview vs GPT-5.4 Mini comparison based on?

64 benchmarks have a result for both models as of October 21, 2026. Gemini 3.1 Flash Lite Preview's coding index rests on 3 independent benchmarks and GPT-5.4 Mini's on 5. Where only one model has a result, the page says so instead of naming a winner.

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Gemini 3.1 Flash Lite Preview or GPT-5.4 Mini: 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