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Gemini 3.5 Flash Lite vs GPT-5 Nano

Gemini 3.5 Flash Lite leads GPT-5 Nano on the Artificial Analysis Intelligence Index, 22.2 to 13.0, and GPT-5 Nano costs 6.3x less per output token ($0.40 vs $2.50 per million). Updated October 22, 2026; 61 benchmarks have a result for both.

Replace Gemini 3.5 Flash Lite Replace GPT-5 Nano
Gemini 3.5 Flash LiteGoogle
Coding
49.0
Overall
49.8
Output $/M
$2.50
57
GPT-5 NanoOpenAI
Coding
No data
Overall
35.6
Output $/M
$0.40
4
vs boards won of 61 shared

Gemini 3.5 Flash Lite or GPT-5 Nano: which to pick

Only Gemini 3.5 Flash Lite has a coding score, 49.0 on the Vibe Coding Index; GPT-5 Nano has none, so the two cannot be ranked on coding.

Pick GPT-5 Nano for output tokens 6.3x cheaper ($0.40 vs $2.50 per million) and a lower cost per solved task ($0.109 against $0.41).

Model AGemini 3.5 Flash LiteGoogle49.0/1003 independent benchmarks$0.41 per solved taskModel BGPT-5 NanoOpenAINot benchmarkedNo coding benchmark$0.109 per solved task
Shared results
61
Gemini 3.5 Flash Lite only
24
GPT-5 Nano only
26
Like-for-like categories
6 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 Nano not benchmarked.
Widest category
General, 21.5 points apart on average over 26 shared benchmarks.
Widest single gap
LegalBench (Vals AI): Gemini 3.5 Flash Lite 84.1% against GPT-5 Nano 50.1%, 33.9 points apart on a 0 to 100 scale.
Output price
Gemini 3.5 Flash Lite $2.50 against GPT-5 Nano $0.40 per million output tokens, 6.3x apart.
Context window
Gemini 3.5 Flash Lite takes 1.05M tokens, GPT-5 Nano 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 NanoTies
Coding40
Intelligence20
Reasoning131
Math42
Knowledge90
General251
All shared boards574
CodingLike-for-likeSix of these boards feed the Vibe Coding Index40
Coding benchmarks for Gemini 3.5 Flash Lite and GPT-5 Nano
BenchmarkGemini 3.5 Flash LiteGPT-5 NanoLeader
SWE-bench VerifiedNot measured34.8%Only GPT-5 Nano measured
LMArena WebDev1435Not measuredOnly Gemini 3.5 Flash Lite measured
AA Coding Index49.3Not measuredOnly Gemini 3.5 Flash Lite measured
LiveCodeBench (Vals AI)79.0%70.2%Gemini 3.5 Flash Lite
SWE-bench Verified (Vals AI)75.0%Not measuredOnly Gemini 3.5 Flash Lite measured
Vibe Code Bench (Vals AI)37.2%Not measuredOnly Gemini 3.5 Flash Lite measured
Code migration (Vals AI)6.2%Not measuredOnly Gemini 3.5 Flash Lite measured
ProgramBench (Vals AI)0.0%Not measuredOnly Gemini 3.5 Flash Lite measured
Terminal-Bench 2.1 (Vals AI)50.2%Not measuredOnly Gemini 3.5 Flash Lite measured
CyberBench (Vals AI)59.1%Not measuredOnly Gemini 3.5 Flash Lite measured
LiveCodeBench (Artificial Analysis run)Not measured78.9%Only GPT-5 Nano measured
SciCode41.3%Not measuredOnly Gemini 3.5 Flash Lite measured
Terminal-Bench Hard (Artificial Analysis run)Not measured17.4%Only GPT-5 Nano measured
Terminal-BenchNot measured21.8%Only GPT-5 Nano measured
WeirdML39.0%38.1%Gemini 3.5 Flash Lite
ALE-Bench765.3Not measuredOnly Gemini 3.5 Flash Lite measured
LMArena Text: coding14531351Gemini 3.5 Flash Lite
LMArena Text: software and IT14511345Gemini 3.5 Flash Lite
LMArena WebDev: React1408Not measuredOnly Gemini 3.5 Flash Lite 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 index20
Intelligence benchmarks for Gemini 3.5 Flash Lite and GPT-5 Nano
BenchmarkGemini 3.5 Flash LiteGPT-5 NanoLeader
AA Intelligence Index22.213.0Gemini 3.5 Flash Lite
Epoch Capabilities Index144.9139.2Gemini 3.5 Flash Lite
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Agentic work benchmarks for Gemini 3.5 Flash Lite and GPT-5 Nano
BenchmarkGemini 3.5 Flash LiteGPT-5 NanoLeader
AA Agentic Index14.3Not measuredOnly Gemini 3.5 Flash Lite measured
Finance Agent (Vals AI)47.4%Not measuredOnly Gemini 3.5 Flash Lite measured
Tax Agent Bench (Vals AI)7.2%Not measuredOnly Gemini 3.5 Flash Lite measured
Legal Research Bench (Vals AI)13.9%Not measuredOnly Gemini 3.5 Flash Lite measured
Excel Modeling Benchmark (Vals AI)43.2%Not measuredOnly Gemini 3.5 Flash Lite measured
τ²-Bench TelecomNot measured36.5%Only GPT-5 Nano measured
APEX-Agents29.3%Not measuredOnly Gemini 3.5 Flash Lite measured
Berkeley Function Calling Leaderboard (BFCL)Not measured51.4%Only GPT-5 Nano measured
Neither model has a result on the other 33 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index131
Reasoning benchmarks for Gemini 3.5 Flash Lite and GPT-5 Nano
BenchmarkGemini 3.5 Flash LiteGPT-5 NanoLeader
GPQA Diamond83.8%63.4%Gemini 3.5 Flash Lite
MMMU Pro (Vals AI)83.6%70.9%Gemini 3.5 Flash Lite
GPQA Diamond (Artificial Analysis run)83.8%67.6%Gemini 3.5 Flash Lite
Humanity's Last Exam (Artificial Analysis run)18.8%9.5%Gemini 3.5 Flash Lite
GPQA Diamond (Epoch AI run)83.3%69.4%Gemini 3.5 Flash Lite
ARC-AGI53.5%20.7%Gemini 3.5 Flash Lite
ARC-AGI-210.3%2.6%Gemini 3.5 Flash Lite
Chess puzzles21.0%22.0%GPT-5 Nano
Mystery game puzzles19.0%9.0%Gemini 3.5 Flash Lite
VPCTNot measured37.2%Only GPT-5 Nano measured
LMArena Text: hard prompts14411328Gemini 3.5 Flash Lite
LMArena Text: expert14341321Gemini 3.5 Flash Lite
LMArena Text: hard prompts in English14401338Gemini 3.5 Flash Lite
LMArena Vision: diagrams12841141Gemini 3.5 Flash Lite
LMArena Vision: homework12911157Gemini 3.5 Flash Lite
Kagi LLM BenchmarkNot measured62.2%Only GPT-5 Nano measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index42
Math benchmarks for Gemini 3.5 Flash Lite and GPT-5 Nano
BenchmarkGemini 3.5 Flash LiteGPT-5 NanoLeader
AIMENot measured81.2%Only GPT-5 Nano measured
MATH 500 (Vals AI)Not measured93.8%Only GPT-5 Nano measured
MGSM (Vals AI)Not measured89.3%Only GPT-5 Nano measured
AA Math IndexNot measured83.7Only GPT-5 Nano measured
AIME 2025 (Artificial Analysis run)Not measured83.7%Only GPT-5 Nano measured
OTIS Mock AIME71.1%81.1%GPT-5 Nano
FrontierMath, tiers 1 to 326.0%20.0%Gemini 3.5 Flash Lite
FrontierMath, tier 40.0%2.4%GPT-5 Nano
ProofBench13.0%12.0%Gemini 3.5 Flash Lite
MATH level 5Not measured95.2%Only GPT-5 Nano measured
LMArena Text: math14341317Gemini 3.5 Flash Lite
LMArena Text: mathematical work14331326Gemini 3.5 Flash Lite
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index90
Knowledge benchmarks for Gemini 3.5 Flash Lite and GPT-5 Nano
BenchmarkGemini 3.5 Flash LiteGPT-5 NanoLeader
MMLU Pro85.8%76.1%Gemini 3.5 Flash Lite
LegalBench (Vals AI)84.1%50.1%Gemini 3.5 Flash Lite
CaseLaw (Vals AI)Not measured52.6%Only GPT-5 Nano measured
CorpFin (Vals AI)60.7%Not measuredOnly Gemini 3.5 Flash Lite measured
TaxEval (Vals AI)72.6%67.4%Gemini 3.5 Flash Lite
MortgageTax (Vals AI)68.7%53.6%Gemini 3.5 Flash Lite
MedQA (Vals AI)Not measured93.3%Only GPT-5 Nano measured
MedCode (Vals AI)43.5%30.4%Gemini 3.5 Flash Lite
MMLU Pro (Artificial Analysis run)Not measured78.0%Only GPT-5 Nano measured
SimpleQA VerifiedNot measured11.7%Only GPT-5 Nano measured
LMArena Text: science14511318Gemini 3.5 Flash Lite
LMArena Text: medicine and healthcare14381335Gemini 3.5 Flash Lite
LMArena Text: legal and government14311298Gemini 3.5 Flash Lite
LMArena Text: business and finance14231311Gemini 3.5 Flash Lite
FACTS Benchmark Suite53.5%Not measuredOnly Gemini 3.5 Flash Lite measured
Neither model has a result on the other 3 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Web design benchmarks for Gemini 3.5 Flash Lite and GPT-5 Nano
BenchmarkGemini 3.5 Flash LiteGPT-5 NanoLeader
Design Arena: websitesNot measured1101Only GPT-5 Nano measured
Design Arena: UI componentsNot measured1064Only GPT-5 Nano measured
Design Arena: game devNot measured1044Only GPT-5 Nano measured
Design Arena: data vizNot measured1056Only GPT-5 Nano measured
Design Arena: 3DNot measured965Only GPT-5 Nano measured
Design Arena: all code categoriesNot measured1084Only GPT-5 Nano measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index251
General benchmarks for Gemini 3.5 Flash Lite and GPT-5 Nano
BenchmarkGemini 3.5 Flash LiteGPT-5 NanoLeader
Public Benefits Bench (Vals AI)51.8%Not measuredOnly Gemini 3.5 Flash Lite measured
SAGE (Vals AI)47.3%30.4%Gemini 3.5 Flash Lite
MedScribe (Vals AI)70.9%72.9%GPT-5 Nano
IFBenchNot measured67.6%Only GPT-5 Nano measured
Long context reasoning (AA-LCR)76.0%45.0%Gemini 3.5 Flash Lite
DTBench83.5%62.7%Gemini 3.5 Flash Lite
LMCA37.6%7.9%Gemini 3.5 Flash Lite
Fiction.LiveBenchNot measured44.4%Only GPT-5 Nano measured
LMArena Text14351320Gemini 3.5 Flash Lite
LMArena Text: instruction following14191306Gemini 3.5 Flash Lite
LMArena Text: creative writing14211249Gemini 3.5 Flash Lite
LMArena Vision12691159Gemini 3.5 Flash Lite
LMArena Text: English14381321Gemini 3.5 Flash Lite
LMArena Text: non-English14271313Gemini 3.5 Flash Lite
LMArena Text: Chinese14681356Gemini 3.5 Flash Lite
LMArena Text: German14541327Gemini 3.5 Flash Lite
LMArena Text: Japanese14261227Gemini 3.5 Flash Lite
LMArena Text: Korean14071269Gemini 3.5 Flash Lite
LMArena Text: French1451Not measuredOnly Gemini 3.5 Flash Lite measured
LMArena Text: Spanish14411360Gemini 3.5 Flash Lite
LMArena Text: Russian14431296Gemini 3.5 Flash Lite
LMArena Text: Polish14371314Gemini 3.5 Flash Lite
LMArena Text: multi-turn14451311Gemini 3.5 Flash Lite
LMArena Text: longer queries14351312Gemini 3.5 Flash Lite
LMArena Text: writing and language14281283Gemini 3.5 Flash Lite
LMArena Text: entertainment and media14141268Gemini 3.5 Flash Lite
LMArena Vision: English12691170Gemini 3.5 Flash Lite
LMArena Vision: Chinese13111176Gemini 3.5 Flash Lite
LMArena Vision: reading text12801152Gemini 3.5 Flash Lite
LMArena Vision: humor12871110Gemini 3.5 Flash Lite
LMArena Vision: creative writing1260Not measuredOnly Gemini 3.5 Flash Lite measured
Neither model has a result on the other 15 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 Nano
BenchmarkGemini 3.5 Flash LiteGPT-5 NanoLeader
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 Nano$0.0003Fits in one request

GPT-5 Nano costs less

Repository review

50K input + 3K output tokens

Gemini 3.5 Flash Lite$0.022Fits in one request
GPT-5 Nano$0.0037Fits in one request

GPT-5 Nano costs less

Agent loop

200K input + 10K output tokens

Gemini 3.5 Flash Lite$0.085Fits in one request
GPT-5 Nano$0.014Fits in one request

GPT-5 Nano 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 Nano
SpecificationGoogle Gemini 3.5 Flash LiteOpenAI GPT-5 Nano
MakerGoogleOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedJuly 21, 2026August 7, 2025
Context window1.05M400K
Input $/Mtok$0.30$0.05
Output $/Mtok$2.50$0.40
Coding index49.0Not benchmarked
Independent measurements behind it30
Cost per solved task$0.41$0.109
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 3.5 Flash Lite better than GPT-5 Nano for coding?

Only Gemini 3.5 Flash Lite has a coding score, 49.0 on the Vibe Coding Index; GPT-5 Nano has none, so the two cannot be ranked on coding. Pick GPT-5 Nano for output tokens 6.3x cheaper ($0.40 vs $2.50 per million) and a lower cost per solved task ($0.109 against $0.41).

Which is cheaper, Gemini 3.5 Flash Lite or GPT-5 Nano?

Gemini 3.5 Flash Lite costs $0.30 per million input tokens and $2.50 per million output tokens; GPT-5 Nano costs $0.05 and $0.40. Per solved SWE-bench Verified task, Gemini 3.5 Flash Lite costs $0.41 and GPT-5 Nano $0.109.

Which has the bigger context window, Gemini 3.5 Flash Lite or GPT-5 Nano?

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

How many benchmarks is the Gemini 3.5 Flash Lite vs GPT-5 Nano comparison based on?

61 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 Nano's on 0. Where only one model has a result, the page says so instead of naming a winner.

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