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Gemini 3.5 Flash Lite vs GPT-5.4 Mini

Gemini 3.5 Flash Lite leads GPT-5.4 Mini on coding, 49.0 to 35.8 on the Vibe Coding Index, and Gemini 3.5 Flash Lite costs 1.8x less per output token ($2.50 vs $4.50 per million). Updated October 22, 2026; 76 benchmarks have a result for both.

Replace Gemini 3.5 Flash Lite Replace GPT-5.4 Mini
Gemini 3.5 Flash LiteGoogle
Coding
49.0
Overall
49.8
Output $/M
$2.50
47
GPT-5.4 MiniOpenAI
Coding
35.8
Overall
44.0
Output $/M
$4.50
28
vs boards won of 76 shared, 1 tied

Gemini 3.5 Flash Lite or GPT-5.4 Mini: which to pick

Pick Gemini 3.5 Flash Lite for coding: it scores 49.0 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini, though on 3 benchmarks against 5.

Pick GPT-5.4 Mini for work measured by AA Coding Index or LiveCodeBench (Vals AI), where it leads.

Model AGemini 3.5 Flash LiteGoogle49.0/1003 independent benchmarks$0.41 per solved taskModel BGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved task
Shared results
76
Gemini 3.5 Flash Lite only
9
GPT-5.4 Mini only
13
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 3.5 Flash Lite 49.0 from 3 benchmarks, GPT-5.4 Mini 35.8 from 5 benchmarks.
Widest category
Math, 10.7 points apart on average over 6 shared benchmarks.
Widest single gap
FrontierMath, tiers 1 to 3: Gemini 3.5 Flash Lite 26.0% against GPT-5.4 Mini 51.2%, 25.3 points apart on a 0 to 100 scale.
Output price
Gemini 3.5 Flash Lite $2.50 against GPT-5.4 Mini $4.50 per million output tokens, 1.8x apart.
Context window
Gemini 3.5 Flash Lite 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
CategoryGemini 3.5 Flash LiteBarsGPT-5.4 MiniTies
Coding581 tie
Intelligence02
Agentic work23
Reasoning77
Math24
Knowledge71
General243
All shared boards47281 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index58
Coding benchmarks for Gemini 3.5 Flash Lite and GPT-5.4 Mini
BenchmarkGemini 3.5 Flash LiteGPT-5.4 MiniLeader
LMArena WebDev14351397Gemini 3.5 Flash Lite
AA Coding Index49.356.1GPT-5.4 Mini
LiveCodeBench (Vals AI)79.0%81.5%GPT-5.4 Mini
SWE-bench Verified (Vals AI)75.0%73.0%Gemini 3.5 Flash Lite
Terminal-Bench 4 (Vals AI)Not measured2.5%Only GPT-5.4 Mini measured
Vibe Code Bench (Vals AI)37.2%48.0%GPT-5.4 Mini
Code migration (Vals AI)6.2%12.9%GPT-5.4 Mini
ProgramBench (Vals AI)0.0%0.0%Tie
Terminal-Bench 2.1 (Vals AI)50.2%54.7%GPT-5.4 Mini
CyberBench (Vals AI)59.1%Not measuredOnly Gemini 3.5 Flash Lite measured
SciCode41.3%52.1%GPT-5.4 Mini
Terminal-Bench Hard (Artificial Analysis run)Not measured52.3%Only GPT-5.4 Mini measured
FrontierCodeNot measured27.0%Only GPT-5.4 Mini measured
WeirdML39.0%60.3%GPT-5.4 Mini
ALE-Bench765.31188.6GPT-5.4 Mini
LMArena Text: coding14531438Gemini 3.5 Flash Lite
LMArena Text: software and IT14511436Gemini 3.5 Flash Lite
LMArena WebDev: React14081386Gemini 3.5 Flash Lite
LMArena WebDev: HTMLNot measured1419Only GPT-5.4 Mini measured
LMArena WebDev: from an image1448Not measuredOnly Gemini 3.5 Flash Lite measured
SciCode6.2%Not measuredOnly Gemini 3.5 Flash Lite measured
Neither model has a result on the other 18 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Gemini 3.5 Flash Lite and GPT-5.4 Mini
BenchmarkGemini 3.5 Flash LiteGPT-5.4 MiniLeader
AA Intelligence Index22.224.1GPT-5.4 Mini
Epoch Capabilities Index144.9148.7GPT-5.4 Mini
Agentic workLike-for-likePublic boards, shown as published, kept out of the index23
Agentic work benchmarks for Gemini 3.5 Flash Lite and GPT-5.4 Mini
BenchmarkGemini 3.5 Flash LiteGPT-5.4 MiniLeader
AA Agentic Index14.317.9GPT-5.4 Mini
Finance Agent (Vals AI)47.4%45.4%Gemini 3.5 Flash Lite
Tax Agent Bench (Vals AI)7.2%8.8%GPT-5.4 Mini
Legal Research Bench (Vals AI)13.9%12.5%Gemini 3.5 Flash Lite
Excel Modeling Benchmark (Vals AI)43.2%45.4%GPT-5.4 Mini
τ²-Bench TelecomNot measured83.3%Only GPT-5.4 Mini measured
APEX-Agents29.3%Not measuredOnly Gemini 3.5 Flash Lite measured
DeepResearch BenchNot measured36.3%Only GPT-5.4 Mini measured
Neither model has a result on the other 33 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index77
Reasoning benchmarks for Gemini 3.5 Flash Lite and GPT-5.4 Mini
BenchmarkGemini 3.5 Flash LiteGPT-5.4 MiniLeader
GPQA Diamond83.8%83.1%Gemini 3.5 Flash Lite
MMMU Pro (Vals AI)83.6%79.3%Gemini 3.5 Flash Lite
GPQA Diamond (Artificial Analysis run)83.8%87.5%GPT-5.4 Mini
Humanity's Last Exam (Artificial Analysis run)18.8%28.1%GPT-5.4 Mini
GPQA Diamond (Epoch AI run)83.3%86.9%GPT-5.4 Mini
ARC-AGI53.5%63.7%GPT-5.4 Mini
ARC-AGI-210.3%18.9%GPT-5.4 Mini
Chess puzzles21.0%23.0%GPT-5.4 Mini
Mystery game puzzles19.0%11.0%Gemini 3.5 Flash Lite
LMArena Text: hard prompts14411424Gemini 3.5 Flash Lite
LMArena Text: expert14341435GPT-5.4 Mini
LMArena Text: hard prompts in English14401420Gemini 3.5 Flash Lite
LMArena Vision: diagrams12841266Gemini 3.5 Flash Lite
LMArena Vision: homework12911285Gemini 3.5 Flash Lite
Kagi LLM BenchmarkNot measured37.9%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 index24
Math benchmarks for Gemini 3.5 Flash Lite and GPT-5.4 Mini
BenchmarkGemini 3.5 Flash LiteGPT-5.4 MiniLeader
AIMENot measured95.6%Only GPT-5.4 Mini measured
OTIS Mock AIME71.1%88.9%GPT-5.4 Mini
FrontierMath, tiers 1 to 326.0%51.2%GPT-5.4 Mini
FrontierMath, tier 40.0%9.8%GPT-5.4 Mini
ProofBench13.0%21.0%GPT-5.4 Mini
LMArena Text: math14341418Gemini 3.5 Flash Lite
LMArena Text: mathematical work14331429Gemini 3.5 Flash Lite
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index71
Knowledge benchmarks for Gemini 3.5 Flash Lite and GPT-5.4 Mini
BenchmarkGemini 3.5 Flash LiteGPT-5.4 MiniLeader
MMLU Pro85.8%84.5%Gemini 3.5 Flash Lite
LegalBench (Vals AI)84.1%Not measuredOnly Gemini 3.5 Flash Lite measured
CaseLaw (Vals AI)Not measured51.7%Only GPT-5.4 Mini measured
CorpFin (Vals AI)60.7%60.9%GPT-5.4 Mini
TaxEval (Vals AI)72.6%71.2%Gemini 3.5 Flash Lite
MortgageTax (Vals AI)68.7%63.5%Gemini 3.5 Flash Lite
MedCode (Vals AI)43.5%Not measuredOnly Gemini 3.5 Flash Lite measured
SimpleQA VerifiedNot measured29.4%Only GPT-5.4 Mini measured
LMArena Text: science14511417Gemini 3.5 Flash Lite
LMArena Text: medicine and healthcare14381395Gemini 3.5 Flash Lite
LMArena Text: legal and government14311414Gemini 3.5 Flash Lite
LMArena Text: business and finance14231418Gemini 3.5 Flash Lite
FACTS Benchmark Suite53.5%Not measuredOnly Gemini 3.5 Flash Lite measured
Neither model has a result on the other 5 boards here
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Web design benchmarks for Gemini 3.5 Flash Lite and GPT-5.4 Mini
BenchmarkGemini 3.5 Flash LiteGPT-5.4 MiniLeader
Neither model has a result on 9 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index243
General benchmarks for Gemini 3.5 Flash Lite and GPT-5.4 Mini
BenchmarkGemini 3.5 Flash LiteGPT-5.4 MiniLeader
Public Benefits Bench (Vals AI)51.8%Not measuredOnly Gemini 3.5 Flash Lite measured
SAGE (Vals AI)47.3%50.8%GPT-5.4 Mini
MedScribe (Vals AI)70.9%Not measuredOnly Gemini 3.5 Flash Lite measured
Vals Multimodal IndexNot measured54.2%Only GPT-5.4 Mini measured
IFBenchNot measured73.3%Only GPT-5.4 Mini measured
Long context reasoning (AA-LCR)76.0%77.0%GPT-5.4 Mini
DTBench83.5%80.0%Gemini 3.5 Flash Lite
LMCA37.6%40.8%GPT-5.4 Mini
LMArena Text14351412Gemini 3.5 Flash Lite
LMArena Text: instruction following14191405Gemini 3.5 Flash Lite
LMArena Text: creative writing14211370Gemini 3.5 Flash Lite
LMArena Vision12691245Gemini 3.5 Flash Lite
LMArena Text: English14381412Gemini 3.5 Flash Lite
LMArena Text: non-English14271405Gemini 3.5 Flash Lite
LMArena Text: Chinese14681446Gemini 3.5 Flash Lite
LMArena Text: German14541408Gemini 3.5 Flash Lite
LMArena Text: Japanese14261375Gemini 3.5 Flash Lite
LMArena Text: Korean14071370Gemini 3.5 Flash Lite
LMArena Text: French14511441Gemini 3.5 Flash Lite
LMArena Text: Spanish14411405Gemini 3.5 Flash Lite
LMArena Text: Russian14431417Gemini 3.5 Flash Lite
LMArena Text: Polish14371415Gemini 3.5 Flash Lite
LMArena Text: multi-turn14451429Gemini 3.5 Flash Lite
LMArena Text: longer queries14351408Gemini 3.5 Flash Lite
LMArena Text: writing and language14281393Gemini 3.5 Flash Lite
LMArena Text: entertainment and media14141373Gemini 3.5 Flash Lite
LMArena Vision: English12691244Gemini 3.5 Flash Lite
LMArena Vision: Chinese13111286Gemini 3.5 Flash Lite
LMArena Vision: reading text12801253Gemini 3.5 Flash Lite
LMArena Vision: humor12871235Gemini 3.5 Flash Lite
LMArena Vision: recognizing thingsNot measured1218Only GPT-5.4 Mini measured
LMArena Vision: creative writing12601222Gemini 3.5 Flash Lite
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 3.5 Flash Lite and GPT-5.4 Mini
BenchmarkGemini 3.5 Flash LiteGPT-5.4 MiniLeader
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 3.5 Flash Lite$0.0015Fits in one request
GPT-5.4 Mini$0.0030Fits in one request

Gemini 3.5 Flash Lite costs less

Repository review

50K input + 3K output tokens

Gemini 3.5 Flash Lite$0.022Fits in one request
GPT-5.4 Mini$0.051Fits in one request

Gemini 3.5 Flash Lite costs less

Agent loop

200K input + 10K output tokens

Gemini 3.5 Flash Lite$0.085Fits in one request
GPT-5.4 Mini$0.195Fits in one request

Gemini 3.5 Flash Lite 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 3.5 Flash Lite and GPT-5.4 Mini
SpecificationGoogle Gemini 3.5 Flash LiteOpenAI GPT-5.4 Mini
MakerGoogleOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedJuly 21, 2026March 17, 2026
Context window1.05M400K
Input $/Mtok$0.30$0.75
Output $/Mtok$2.50$4.50
Coding index49.035.8
Independent measurements behind it35
Cost per solved task$0.41$0.70
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 3.5 Flash Lite better than GPT-5.4 Mini for coding?

Pick Gemini 3.5 Flash Lite for coding: it scores 49.0 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini, though on 3 benchmarks against 5. Pick GPT-5.4 Mini for work measured by AA Coding Index or LiveCodeBench (Vals AI), where it leads.

Which is cheaper, Gemini 3.5 Flash Lite or GPT-5.4 Mini?

Gemini 3.5 Flash Lite costs $0.30 per million input tokens and $2.50 per million output tokens; GPT-5.4 Mini costs $0.75 and $4.50. Per solved SWE-bench Verified task, Gemini 3.5 Flash Lite costs $0.41 and GPT-5.4 Mini $0.70.

Which has the bigger context window, Gemini 3.5 Flash Lite or GPT-5.4 Mini?

Gemini 3.5 Flash Lite, with 1.05M tokens against 400K.

How many benchmarks is the Gemini 3.5 Flash Lite vs GPT-5.4 Mini comparison based on?

76 benchmarks have a result for both models as of October 22, 2026. Gemini 3.5 Flash Lite'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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