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Gemini 3.5 Flash Lite vs GPT-6 Sol

GPT-6 Sol leads Gemini 3.5 Flash Lite on coding, 76.0 to 49.0 on the Vibe Coding Index, and Gemini 3.5 Flash Lite costs 4.0x less per output token ($2.50 vs $10.00 per million). Updated October 21, 2026; 69 benchmarks have a result for both.

Replace Gemini 3.5 Flash Lite Replace GPT-6 Sol
Gemini 3.5 Flash LiteGoogle
Coding
49.0
Overall
49.8
Output $/M
$2.50
34
GPT-6 SolOpenAI
Coding
76.0
Overall
74.6
Output $/M
$10.00
35
vs boards won of 69 shared

Gemini 3.5 Flash Lite or GPT-6 Sol: which to pick

Pick GPT-6 Sol for coding: it scores 76.0 on the Vibe Coding Index against 49.0 for Gemini 3.5 Flash Lite.

Pick Gemini 3.5 Flash Lite for output tokens 4.0x cheaper ($2.50 vs $10.00 per million) and work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Model AGemini 3.5 Flash LiteGoogle49.0/1003 independent benchmarks$0.41 per solved taskModel BGPT-6 SolOpenAI76.0/1005 independent benchmarksNo cost per solved task
Shared results
69
Gemini 3.5 Flash Lite only
16
GPT-6 Sol only
32
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-6 Sol 76.0 from 5 benchmarks.
Widest category
Math, 43.1 points apart on average over 6 shared benchmarks.
Widest single gap
FrontierMath, tier 4: Gemini 3.5 Flash Lite 0.0% against GPT-6 Sol 90.0%, 90.0 points apart on a 0 to 100 scale.
Output price
Gemini 3.5 Flash Lite $2.50 against GPT-6 Sol $10.00 per million output tokens, 4.0x apart.
Context window
Gemini 3.5 Flash Lite takes 1.05M tokens, GPT-6 Sol 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 3.5 Flash LiteBarsGPT-6 SolTies
Coding210
Intelligence02
Agentic work05
Reasoning47
Math24
Knowledge42
General225
All shared boards3435
CodingLike-for-likeSix of these boards feed the Vibe Coding Index210
Coding benchmarks for Gemini 3.5 Flash Lite and GPT-6 Sol
BenchmarkGemini 3.5 Flash LiteGPT-6 SolLeader
LiveBench codingNot measured93.1%Only GPT-6 Sol measured
LMArena WebDev14351683GPT-6 Sol
AA Coding Index49.3Not measuredOnly Gemini 3.5 Flash Lite measured
LiveCodeBench (Vals AI)79.0%Not measuredOnly Gemini 3.5 Flash Lite measured
SWE-bench Verified (Vals AI)75.0%Not measuredOnly Gemini 3.5 Flash Lite measured
Terminal-Bench 4 (Vals AI)Not measured44.4%Only GPT-6 Sol measured
Vibe Code Bench (Vals AI)37.2%87.8%GPT-6 Sol
Code migration (Vals AI)6.2%57.2%GPT-6 Sol
ProgramBench (Vals AI)0.0%2.0%GPT-6 Sol
IOI (Vals AI)Not measured82.6%Only GPT-6 Sol measured
Terminal-Bench 2.1 (Vals AI)50.2%83.2%GPT-6 Sol
CyberBench (Vals AI)59.1%78.0%GPT-6 Sol
SciCode41.3%57.6%GPT-6 Sol
FrontierCodeNot measured49.3%Only GPT-6 Sol measured
WeirdML39.0%Not measuredOnly Gemini 3.5 Flash Lite measured
ALE-Bench765.32462.0GPT-6 Sol
LMArena Text: coding14531448Gemini 3.5 Flash Lite
LMArena Text: software and IT14511433Gemini 3.5 Flash Lite
LMArena WebDev: React14081685GPT-6 Sol
LMArena WebDev: HTMLNot measured1685Only GPT-6 Sol measured
LMArena WebDev: from an image14481660GPT-6 Sol
SciCode6.2%Not measuredOnly Gemini 3.5 Flash Lite measured
Neither model has a result on the other 17 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Gemini 3.5 Flash Lite and GPT-6 Sol
BenchmarkGemini 3.5 Flash LiteGPT-6 SolLeader
AA Intelligence Index22.247.6GPT-6 Sol
Epoch Capabilities Index144.9163.7GPT-6 Sol
Agentic workLike-for-likePublic boards, shown as published, kept out of the index05
Agentic work benchmarks for Gemini 3.5 Flash Lite and GPT-6 Sol
BenchmarkGemini 3.5 Flash LiteGPT-6 SolLeader
AA Agentic Index14.3Not measuredOnly Gemini 3.5 Flash Lite measured
Design Arena: agents building web appsNot measured1231Only GPT-6 Sol measured
Design Arena: agents building full-stack appsNot measured1238Only GPT-6 Sol measured
Design Arena: agents building mobile appsNot measured1214Only GPT-6 Sol measured
LiveBench researchNot measured69.3%Only GPT-6 Sol measured
LiveBench browserNot measured92.0%Only GPT-6 Sol measured
LiveBench long agenticNot measured66.9%Only GPT-6 Sol measured
SREBench (Vals AI)Not measured30.5%Only GPT-6 Sol measured
Finance Agent (Vals AI)47.4%49.0%GPT-6 Sol
Tax Agent Bench (Vals AI)7.2%15.0%GPT-6 Sol
Legal Research Bench (Vals AI)13.9%28.9%GPT-6 Sol
Excel Modeling Benchmark (Vals AI)43.2%71.5%GPT-6 Sol
BioMysteryBench (Vals AI)Not measured74.8%Only GPT-6 Sol measured
Terminal-Bench-Science (Vals AI)Not measured30.0%Only GPT-6 Sol measured
Vals Science IndexNot measured45.0%Only GPT-6 Sol measured
APEX-Agents29.3%54.3%GPT-6 Sol
SpireClimbNot measured7.5%Only GPT-6 Sol measured
Vending-Bench 2Not measured$14,428Only GPT-6 Sol measured
Neither model has a result on the other 23 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index47
Reasoning benchmarks for Gemini 3.5 Flash Lite and GPT-6 Sol
BenchmarkGemini 3.5 Flash LiteGPT-6 SolLeader
GPQA Diamond83.8%Not measuredOnly Gemini 3.5 Flash Lite measured
LiveBench reasoningNot measured88.7%Only GPT-6 Sol measured
MysteryMechanism (Vals AI)Not measured30.2%Only GPT-6 Sol measured
MMMU Pro (Vals AI)83.6%Not measuredOnly Gemini 3.5 Flash Lite measured
GPQA Diamond (Artificial Analysis run)83.8%Not measuredOnly Gemini 3.5 Flash Lite measured
Humanity's Last Exam (Artificial Analysis run)18.8%47.9%GPT-6 Sol
GPQA Diamond (Epoch AI run)83.3%94.3%GPT-6 Sol
ARC-AGI53.5%95.5%GPT-6 Sol
ARC-AGI-210.3%89.6%GPT-6 Sol
Chess puzzles21.0%56.0%GPT-6 Sol
Mystery game puzzles19.0%56.0%GPT-6 Sol
EBR-benchNot measured53.3%Only GPT-6 Sol measured
LMArena Text: hard prompts14411422Gemini 3.5 Flash Lite
LMArena Text: expert14341437GPT-6 Sol
LMArena Text: hard prompts in English14401420Gemini 3.5 Flash Lite
LMArena Vision: diagrams12841270Gemini 3.5 Flash Lite
LMArena Vision: homework12911286Gemini 3.5 Flash Lite
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index24
Math benchmarks for Gemini 3.5 Flash Lite and GPT-6 Sol
BenchmarkGemini 3.5 Flash LiteGPT-6 SolLeader
OTIS Mock AIME71.1%100.0%GPT-6 Sol
FrontierMath, tiers 1 to 326.0%89.8%GPT-6 Sol
FrontierMath, tier 40.0%90.0%GPT-6 Sol
ProofBench13.0%83.0%GPT-6 Sol
LMArena Text: math14341407Gemini 3.5 Flash Lite
LMArena Text: mathematical work14331424Gemini 3.5 Flash Lite
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index42
Knowledge benchmarks for Gemini 3.5 Flash Lite and GPT-6 Sol
BenchmarkGemini 3.5 Flash LiteGPT-6 SolLeader
MMLU Pro85.8%Not measuredOnly Gemini 3.5 Flash Lite measured
LegalBench (Vals AI)84.1%Not measuredOnly Gemini 3.5 Flash Lite measured
CorpFin (Vals AI)60.7%Not measuredOnly Gemini 3.5 Flash Lite measured
TaxEval (Vals AI)72.6%Not measuredOnly Gemini 3.5 Flash Lite measured
MortgageTax (Vals AI)68.7%Not measuredOnly Gemini 3.5 Flash Lite measured
MedCode (Vals AI)43.5%47.1%GPT-6 Sol
SimpleQA VerifiedNot measured60.7%Only GPT-6 Sol measured
LMArena Text: science14511389Gemini 3.5 Flash Lite
LMArena Text: medicine and healthcare14381366Gemini 3.5 Flash Lite
LMArena Text: legal and government14311396Gemini 3.5 Flash Lite
LMArena Text: business and finance14231380Gemini 3.5 Flash Lite
FACTS Benchmark Suite53.5%72.5%GPT-6 Sol
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Web design benchmarks for Gemini 3.5 Flash Lite and GPT-6 Sol
BenchmarkGemini 3.5 Flash LiteGPT-6 SolLeader
Design Arena: websitesNot measured1292Only GPT-6 Sol measured
Design Arena: UI componentsNot measured1292Only GPT-6 Sol measured
Design Arena: game devNot measured1314Only GPT-6 Sol measured
Design Arena: data vizNot measured1269Only GPT-6 Sol measured
Design Arena: 3DNot measured1318Only GPT-6 Sol measured
Design Arena: all code categoriesNot measured1301Only GPT-6 Sol measured
Design Arena: SVGNot measured1316Only GPT-6 Sol measured
Design Arena: ASCII artNot measured1225Only GPT-6 Sol measured
LiveBench designNot measured82.2%Only GPT-6 Sol measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index225
General benchmarks for Gemini 3.5 Flash Lite and GPT-6 Sol
BenchmarkGemini 3.5 Flash LiteGPT-6 SolLeader
LiveBench data analysisNot measured81.2%Only GPT-6 Sol measured
Public Benefits Bench (Vals AI)51.8%56.6%GPT-6 Sol
SAGE (Vals AI)47.3%44.8%Gemini 3.5 Flash Lite
MedScribe (Vals AI)70.9%82.0%GPT-6 Sol
Long context reasoning (AA-LCR)76.0%83.7%GPT-6 Sol
DTBench83.5%97.3%GPT-6 Sol
LMCA37.6%59.1%GPT-6 Sol
Furniture assemblyNot measured58.3%Only GPT-6 Sol measured
LMArena Text14351398Gemini 3.5 Flash Lite
LMArena Text: instruction following14191413Gemini 3.5 Flash Lite
LMArena Text: creative writing14211378Gemini 3.5 Flash Lite
LMArena Vision12691240Gemini 3.5 Flash Lite
LMArena Text: English14381396Gemini 3.5 Flash Lite
LMArena Text: non-English14271388Gemini 3.5 Flash Lite
LMArena Text: Chinese14681412Gemini 3.5 Flash Lite
LMArena Text: German14541379Gemini 3.5 Flash Lite
LMArena Text: Japanese14261377Gemini 3.5 Flash Lite
LMArena Text: Korean14071336Gemini 3.5 Flash Lite
LMArena Text: French14511399Gemini 3.5 Flash Lite
LMArena Text: Spanish14411387Gemini 3.5 Flash Lite
LMArena Text: Russian14431402Gemini 3.5 Flash Lite
LMArena Text: Polish14371372Gemini 3.5 Flash Lite
LMArena Text: multi-turn14451414Gemini 3.5 Flash Lite
LMArena Text: longer queries14351416Gemini 3.5 Flash Lite
LMArena Text: writing and language14281389Gemini 3.5 Flash Lite
LMArena Text: entertainment and media14141373Gemini 3.5 Flash Lite
LMArena Vision: English12691229Gemini 3.5 Flash Lite
LMArena Vision: Chinese1311Not measuredOnly Gemini 3.5 Flash Lite measured
LMArena Vision: reading text12801258Gemini 3.5 Flash Lite
LMArena Vision: humor1287Not measuredOnly Gemini 3.5 Flash Lite measured
LMArena Vision: creative writing12601219Gemini 3.5 Flash Lite
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-6 Sol
BenchmarkGemini 3.5 Flash LiteGPT-6 SolLeader
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-6 Sol$0.0070Fits 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-6 Sol$0.130Fits 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-6 Sol$0.500Fits 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-6 Sol
SpecificationGoogle Gemini 3.5 Flash LiteOpenAI GPT-6 Sol
MakerGoogleOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedJuly 21, 2026September 22, 2026
Context window1.05M1.05M
Input $/Mtok$0.30$2.00
Output $/Mtok$2.50$10.00
Coding index49.076.0
Independent measurements behind it35
Cost per solved task$0.41Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 3.5 Flash Lite better than GPT-6 Sol for coding?

Pick GPT-6 Sol for coding: it scores 76.0 on the Vibe Coding Index against 49.0 for Gemini 3.5 Flash Lite. Pick Gemini 3.5 Flash Lite for output tokens 4.0x cheaper ($2.50 vs $10.00 per million) and work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Which is cheaper, Gemini 3.5 Flash Lite or GPT-6 Sol?

Gemini 3.5 Flash Lite costs $0.30 per million input tokens and $2.50 per million output tokens; GPT-6 Sol costs $2.00 and $10.00. Cost per solved task is known for Gemini 3.5 Flash Lite only.

Which has the bigger context window, Gemini 3.5 Flash Lite or GPT-6 Sol?

GPT-6 Sol, with 1.05M tokens against 1.05M.

How many benchmarks is the Gemini 3.5 Flash Lite vs GPT-6 Sol comparison based on?

69 benchmarks have a result for both models as of October 21, 2026. Gemini 3.5 Flash Lite's coding index rests on 3 independent benchmarks and GPT-6 Sol's on 5. Where only one model has a result, the page says so instead of naming a winner.

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