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Gemini 3.1 Flash Lite Preview vs GPT-5.4

GPT-5.4 leads Gemini 3.1 Flash Lite Preview on coding, 64.4 to 22.7 on the Vibe Coding Index, and Gemini 3.1 Flash Lite Preview costs 10.0x less per output token ($1.50 vs $15.00 per million). Updated October 21, 2026; 69 benchmarks have a result for both.

Replace Gemini 3.1 Flash Lite Preview Replace GPT-5.4
Gemini 3.1 Flash Lite PreviewGoogle
Coding
22.7
Overall
36.6
Output $/M
$1.50
3
GPT-5.4OpenAI
Coding
64.4
Overall
69.6
Output $/M
$15.00
66
vs boards won of 69 shared

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

Pick GPT-5.4 for coding: it scores 64.4 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 10.0x cheaper ($1.50 vs $15.00 per million) and a lower cost per solved task ($0.18 against $1.02).

Model AGemini 3.1 Flash Lite PreviewGoogle22.7/1003 independent benchmarks$0.18 per solved taskModel BGPT-5.4OpenAI64.4/1003 independent benchmarks$1.02 per solved task
Shared results
69
Gemini 3.1 Flash Lite Preview only
10
GPT-5.4 only
41
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.

At a glance

Coding index
Gemini 3.1 Flash Lite Preview 22.7 from 3 benchmarks, GPT-5.4 64.4 from 3 benchmarks.
Widest category
Coding, 25.0 points apart on average over 13 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Gemini 3.1 Flash Lite Preview 0.0% against GPT-5.4 67.4%, 67.4 points apart on a 0 to 100 scale.
Output price
Gemini 3.1 Flash Lite Preview $1.50 against GPT-5.4 $15.00 per million output tokens, 10.0x apart.
Context window
Gemini 3.1 Flash Lite Preview takes 1.05M tokens, GPT-5.4 1.05M.

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
CategoryGemini 3.1 Flash Lite PreviewBarsGPT-5.4Ties
Coding013
Intelligence01
Reasoning07
Math03
Knowledge110
Web design08
General224
All shared boards366
CodingLike-for-likeSix of these boards feed the Vibe Coding Index013
Coding benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4
BenchmarkGemini 3.1 Flash Lite PreviewGPT-5.4Leader
LMArena WebDev12571464GPT-5.4
AA Coding Index34.771.1GPT-5.4
LiveCodeBench (Vals AI)80.1%84.1%GPT-5.4
SWE-bench Verified (Vals AI)62.8%78.2%GPT-5.4
Vibe Code Bench (Vals AI)0.0%67.4%GPT-5.4
Code migration (Vals AI)4.6%35.0%GPT-5.4
ProgramBench (Vals AI)0.0%0.5%GPT-5.4
Terminal-Bench 2.1 (Vals AI)34.1%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
SkillsBench (Vals AI)Not measured51.7%Only GPT-5.4 measured
Terminal-Bench Hard (Artificial Analysis run)Not measured57.6%Only GPT-5.4 measured
Terminal-BenchNot measured81.8%Only GPT-5.4 measured
GSO-BenchNot measured31.4%Only GPT-5.4 measured
WeirdMLNot measured77.7%Only GPT-5.4 measured
MirrorCodeNot measured15.6%Only GPT-5.4 measured
ALE-Bench797.71607.0GPT-5.4
LMArena Text: coding14001496GPT-5.4
LMArena Text: software and IT14131491GPT-5.4
LMArena WebDev: React12451454GPT-5.4
LMArena WebDev: HTML12761478GPT-5.4
LMArena WebDev: from an image13361436GPT-5.4
SciCode4.6%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 18 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
BenchmarkGemini 3.1 Flash Lite PreviewGPT-5.4Leader
AA Intelligence Index15.639.0GPT-5.4
Epoch Capabilities IndexNot measured157.3Only GPT-5.4 measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index16 boards, none shared
Agentic work benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4
BenchmarkGemini 3.1 Flash Lite PreviewGPT-5.4Leader
AA Agentic Index1.6Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Design Arena: agents building web appsNot measured1059Only GPT-5.4 measured
Design Arena: agents building full-stack appsNot measured1017Only GPT-5.4 measured
Design Arena: agents building mobile appsNot measured1087Only GPT-5.4 measured
Design Arena: agents building Android appsNot measured1030Only GPT-5.4 measured
Design Arena: agents building Godot gamesNot measured1135Only GPT-5.4 measured
Finance Agent (Vals AI)30.0%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Tax Agent Bench (Vals AI)3.1%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Legal Research Bench (Vals AI)3.4%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Excel Modeling Benchmark (Vals AI)8.6%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
τ²-Bench TelecomNot measured87.1%Only GPT-5.4 measured
APEX-AgentsNot measured52.4%Only GPT-5.4 measured
METR time horizonsNot measured74.3%Only GPT-5.4 measured
DeepResearch BenchNot measured35.1%Only GPT-5.4 measured
PostTrainBenchNot measured19.0%Only GPT-5.4 measured
Vending-Bench 2Not measured$6,144Only GPT-5.4 measured
Neither model has a result on the other 25 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index07
Reasoning benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4
BenchmarkGemini 3.1 Flash Lite PreviewGPT-5.4Leader
GPQA Diamond81.1%91.7%GPT-5.4
MMMU Pro (Vals AI)82.5%87.5%GPT-5.4
GPQA Diamond (Artificial Analysis run)Not measured92.0%Only GPT-5.4 measured
Humanity's Last Exam (Artificial Analysis run)Not measured43.7%Only GPT-5.4 measured
GPQA Diamond (Epoch AI run)Not measured93.3%Only GPT-5.4 measured
ARC-AGINot measured93.7%Only GPT-5.4 measured
ARC-AGI-2Not measured74.0%Only GPT-5.4 measured
Chess puzzlesNot measured48.0%Only GPT-5.4 measured
Mystery game puzzlesNot measured37.0%Only GPT-5.4 measured
EBR-benchNot measured25.4%Only GPT-5.4 measured
LMArena Text: hard prompts14071485GPT-5.4
LMArena Text: expert13981507GPT-5.4
LMArena Text: hard prompts in English14031479GPT-5.4
LMArena Vision: diagrams12421327GPT-5.4
LMArena Vision: homework12711336GPT-5.4
Kagi LLM BenchmarkNot measured63.8%Only GPT-5.4 measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index03
Math benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4
BenchmarkGemini 3.1 Flash Lite PreviewGPT-5.4Leader
AIME83.3%96.7%GPT-5.4
OTIS Mock AIMENot measured97.8%Only GPT-5.4 measured
FrontierMath, tiers 1 to 3Not measured78.6%Only GPT-5.4 measured
FrontierMath, tier 4Not measured49.0%Only GPT-5.4 measured
ProofBenchNot measured56.0%Only GPT-5.4 measured
LMArena Text: math14281488GPT-5.4
LMArena Text: mathematical work14171497GPT-5.4
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index110
Knowledge benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4
BenchmarkGemini 3.1 Flash Lite PreviewGPT-5.4Leader
MMLU Pro86.2%87.5%GPT-5.4
LegalBench (Vals AI)83.8%86.0%GPT-5.4
CaseLaw (Vals AI)55.0%63.8%GPT-5.4
CorpFin (Vals AI)59.4%65.3%GPT-5.4
TaxEval (Vals AI)71.8%74.0%GPT-5.4
MortgageTax (Vals AI)68.0%68.3%GPT-5.4
MedQA (Vals AI)Not measured96.1%Only GPT-5.4 measured
MedCode (Vals AI)47.6%41.3%Gemini 3.1 Flash Lite Preview
SimpleQA VerifiedNot measured45.1%Only GPT-5.4 measured
LMArena Text: science14251479GPT-5.4
LMArena Text: medicine and healthcare14281458GPT-5.4
LMArena Text: legal and government14181486GPT-5.4
LMArena Text: business and finance13891474GPT-5.4
FACTS Benchmark Suite51.4%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index08
Web design benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4
BenchmarkGemini 3.1 Flash Lite PreviewGPT-5.4Leader
Design Arena: websites10831199GPT-5.4
Design Arena: UI components10721215GPT-5.4
Design Arena: game dev10291195GPT-5.4
Design Arena: data viz10451196GPT-5.4
Design Arena: 3D10481066GPT-5.4
Design Arena: all code categories10721180GPT-5.4
Design Arena: SVG10521142GPT-5.4
Design Arena: ASCII art11671188GPT-5.4
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index224
General benchmarks for Gemini 3.1 Flash Lite Preview and GPT-5.4
BenchmarkGemini 3.1 Flash Lite PreviewGPT-5.4Leader
SAGE (Vals AI)49.5%43.3%Gemini 3.1 Flash Lite Preview
MedScribe (Vals AI)63.9%77.5%GPT-5.4
Vals Multimodal Index41.4%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
IFBenchNot measured73.9%Only GPT-5.4 measured
Long context reasoning (AA-LCR)Not measured82.0%Only GPT-5.4 measured
DTBenchNot measured94.4%Only GPT-5.4 measured
LMCANot measured52.0%Only GPT-5.4 measured
CL-benchNot measured27.9%Only GPT-5.4 measured
Furniture assemblyNot measured37.5%Only GPT-5.4 measured
CL-bench LifeNot measured21.7%Only GPT-5.4 measured
LMArena Text14161469GPT-5.4
LMArena Text: instruction following13771469GPT-5.4
LMArena Text: creative writing14011439GPT-5.4
LMArena Vision12401303GPT-5.4
LMArena Text: English14141467GPT-5.4
LMArena Text: non-English14101465GPT-5.4
LMArena Text: Chinese14601520GPT-5.4
LMArena Text: German14301472GPT-5.4
LMArena Text: Japanese14131485GPT-5.4
LMArena Text: Korean13921449GPT-5.4
LMArena Text: French14241493GPT-5.4
LMArena Text: Spanish14211452GPT-5.4
LMArena Text: Russian14201480GPT-5.4
LMArena Text: Polish14431472GPT-5.4
LMArena Text: multi-turn14171482GPT-5.4
LMArena Text: longer queries13941473GPT-5.4
LMArena Text: writing and language14081458GPT-5.4
LMArena Text: entertainment and media13861438GPT-5.4
LMArena Vision: English12321301GPT-5.4
LMArena Vision: Chinese12781354GPT-5.4
LMArena Vision: reading text12461312GPT-5.4
LMArena Vision: humor12661284GPT-5.4
LMArena Vision: captioning1259Not measuredOnly Gemini 3.1 Flash Lite Preview measured
LMArena Vision: recognizing things13081251Gemini 3.1 Flash Lite Preview
LMArena Vision: creative writing12481283GPT-5.4
LMArena DocumentNot measured1471Only GPT-5.4 measured
Neither model has a result on the other 10 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
BenchmarkGemini 3.1 Flash Lite PreviewGPT-5.4Leader
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$0.010Fits 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$0.170Fits 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$0.650Fits 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
SpecificationGoogle Gemini 3.1 Flash Lite PreviewOpenAI GPT-5.4
MakerGoogleOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedMarch 3, 2026March 5, 2026
Context window1.05M1.05M
Input $/Mtok$0.25$2.50
Output $/Mtok$1.50$15.00
Coding index22.764.4
Independent measurements behind it33
Cost per solved task$0.18$1.02
SourceOpenRouter listingOpenRouter listing

Questions

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

Pick GPT-5.4 for coding: it scores 64.4 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 10.0x cheaper ($1.50 vs $15.00 per million) and a lower cost per solved task ($0.18 against $1.02).

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

Gemini 3.1 Flash Lite Preview costs $0.25 per million input tokens and $1.50 per million output tokens; GPT-5.4 costs $2.50 and $15.00. Per solved SWE-bench Verified task, Gemini 3.1 Flash Lite Preview costs $0.18 and GPT-5.4 $1.02.

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

GPT-5.4, with 1.05M tokens against 1.05M.

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

69 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's on 3. 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/gemini-3-1-flash-lite-preview-vs-gpt-5-4">LLMBenchmark.ai, Gemini 3.1 Flash Lite Preview vs GPT-5.4</a></p>