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Claude Opus 4.6 vs Gemini 3.5 Flash Lite

Claude Opus 4.6 leads Gemini 3.5 Flash Lite on coding, 57.2 to 49.0 on the Vibe Coding Index, and Gemini 3.5 Flash Lite costs 10.0x less per output token ($2.50 vs $25.00 per million). Updated October 22, 2026; 71 benchmarks have a result for both.

Replace Claude Opus 4.6 Replace Gemini 3.5 Flash Lite
Claude Opus 4.6Anthropic
Coding
57.2
Overall
66.0
Output $/M
$25.00
68
Gemini 3.5 Flash LiteGoogle
Coding
49.0
Overall
49.8
Output $/M
$2.50
2
vs boards won of 71 shared, 1 tied

Claude Opus 4.6 or Gemini 3.5 Flash Lite: which to pick

Pick Claude Opus 4.6 for coding: it scores 57.2 on the Vibe Coding Index against 49.0 for Gemini 3.5 Flash Lite.

Pick Gemini 3.5 Flash Lite for output tokens 10.0x cheaper ($2.50 vs $25.00 per million) and a lower cost per solved task ($0.41 against $1.56).

Model AClaude Opus 4.6Anthropic57.2/1004 independent benchmarks$1.56 per solved taskModel BGemini 3.5 Flash LiteGoogle49.0/1003 independent benchmarks$0.41 per solved task
Shared results
71
Claude Opus 4.6 only
39
Gemini 3.5 Flash Lite only
14
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
Claude Opus 4.6 57.2 from 4 benchmarks, Gemini 3.5 Flash Lite 49.0 from 3 benchmarks.
Widest category
Math, 26.1 points apart on average over 6 shared benchmarks.
Widest single gap
ARC-AGI-2: Claude Opus 4.6 69.2% against Gemini 3.5 Flash Lite 10.3%, 58.9 points apart on a 0 to 100 scale.
Output price
Claude Opus 4.6 $25.00 against Gemini 3.5 Flash Lite $2.50 per million output tokens, 10.0x apart.
Context window
Claude Opus 4.6 takes 1M tokens, Gemini 3.5 Flash Lite 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
CategoryClaude Opus 4.6BarsGemini 3.5 Flash LiteTies
Coding90
Intelligence20
Agentic work10
Reasoning1301 tie
Math60
Knowledge92
General280
All shared boards6821 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index90
Coding benchmarks for Claude Opus 4.6 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.6Gemini 3.5 Flash LiteLeader
SWE-bench Verified75.6%Not measuredOnly Claude Opus 4.6 measured
SWE-bench Multilingual72.0%Not measuredOnly Claude Opus 4.6 measured
LMArena WebDev15471435Claude Opus 4.6
AA Coding IndexNot measured49.3Only Gemini 3.5 Flash Lite measured
LiveCodeBench (Vals AI)84.7%79.0%Claude Opus 4.6
SWE-bench Verified (Vals AI)78.2%75.0%Claude Opus 4.6
Vibe Code Bench (Vals AI)57.6%37.2%Claude Opus 4.6
Code migration (Vals AI)Not measured6.2%Only Gemini 3.5 Flash Lite measured
ProgramBench (Vals AI)Not measured0.0%Only Gemini 3.5 Flash Lite measured
Terminal-Bench 2.1 (Vals AI)Not measured50.2%Only Gemini 3.5 Flash Lite measured
CyberBench (Vals AI)Not measured59.1%Only Gemini 3.5 Flash Lite measured
SciCodeNot measured41.3%Only Gemini 3.5 Flash Lite measured
Terminal-Bench Hard (Artificial Analysis run)48.5%Not measuredOnly Claude Opus 4.6 measured
Terminal-Bench79.8%Not measuredOnly Claude Opus 4.6 measured
FrontierCode26.6%Not measuredOnly Claude Opus 4.6 measured
GSO-Bench41.2%Not measuredOnly Claude Opus 4.6 measured
WeirdML78.0%39.0%Claude Opus 4.6
Cybench93.0%Not measuredOnly Claude Opus 4.6 measured
ALE-BenchNot measured765.3Only Gemini 3.5 Flash Lite measured
LMArena Text: coding15341453Claude Opus 4.6
LMArena Text: software and IT15271451Claude Opus 4.6
LMArena WebDev: React15391408Claude Opus 4.6
LMArena WebDev: HTML1559Not measuredOnly Claude Opus 4.6 measured
LMArena WebDev: from an image15431448Claude Opus 4.6
SciCodeNot measured6.2%Only Gemini 3.5 Flash Lite measured
Neither model has a result on the other 14 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Opus 4.6 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.6Gemini 3.5 Flash LiteLeader
AA Intelligence Index31.922.2Claude Opus 4.6
Epoch Capabilities Index155.7144.9Claude Opus 4.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Claude Opus 4.6 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.6Gemini 3.5 Flash LiteLeader
AA Agentic IndexNot measured14.3Only Gemini 3.5 Flash Lite measured
Design Arena: agents building web apps1206Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building full-stack apps1220Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building mobile apps1207Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building Android apps1197Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building games1212Not measuredOnly Claude Opus 4.6 measured
Finance Agent (Vals AI)Not measured47.4%Only Gemini 3.5 Flash Lite measured
Tax Agent Bench (Vals AI)Not measured7.2%Only Gemini 3.5 Flash Lite measured
Legal Research Bench (Vals AI)Not measured13.9%Only Gemini 3.5 Flash Lite measured
Excel Modeling Benchmark (Vals AI)Not measured43.2%Only Gemini 3.5 Flash Lite measured
τ²-Bench Telecom92.1%Not measuredOnly Claude Opus 4.6 measured
APEX-Agents46.3%29.3%Claude Opus 4.6
METR time horizons78.9%Not measuredOnly Claude Opus 4.6 measured
Remote Labor Index4.2%Not measuredOnly Claude Opus 4.6 measured
DeepResearch Bench55.3%Not measuredOnly Claude Opus 4.6 measured
Vending-Bench 2$8,018Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 25 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index130
Reasoning benchmarks for Claude Opus 4.6 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.6Gemini 3.5 Flash LiteLeader
GPQA Diamond89.7%83.8%Claude Opus 4.6
MMMU Pro (Vals AI)83.9%83.6%Claude Opus 4.6
GPQA Diamond (Artificial Analysis run)89.6%83.8%Claude Opus 4.6
Humanity's Last Exam (Artificial Analysis run)39.9%18.8%Claude Opus 4.6
GPQA Diamond (Epoch AI run)90.5%83.3%Claude Opus 4.6
ARC-AGI94.0%53.5%Claude Opus 4.6
ARC-AGI-269.2%10.3%Claude Opus 4.6
SimpleBench67.6%Not measuredOnly Claude Opus 4.6 measured
Chess puzzles21.0%21.0%Tie
Mystery game puzzles25.0%19.0%Claude Opus 4.6
EBR-bench12.7%Not measuredOnly Claude Opus 4.6 measured
LMArena Text: hard prompts15251441Claude Opus 4.6
LMArena Text: expert15441434Claude Opus 4.6
LMArena Text: hard prompts in English15301440Claude Opus 4.6
LMArena Vision: diagrams13401284Claude Opus 4.6
LMArena Vision: homework13371291Claude Opus 4.6
Kagi LLM Benchmark83.6%Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index60
Math benchmarks for Claude Opus 4.6 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.6Gemini 3.5 Flash LiteLeader
AIME95.6%Not measuredOnly Claude Opus 4.6 measured
OTIS Mock AIME94.4%71.1%Claude Opus 4.6
FrontierMath, tiers 1 to 366.0%26.0%Claude Opus 4.6
FrontierMath, tier 426.8%0.0%Claude Opus 4.6
ProofBench50.0%13.0%Claude Opus 4.6
LMArena Text: math15181434Claude Opus 4.6
LMArena Text: mathematical work15251433Claude Opus 4.6
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index92
Knowledge benchmarks for Claude Opus 4.6 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.6Gemini 3.5 Flash LiteLeader
MMLU Pro89.1%85.8%Claude Opus 4.6
LegalBench (Vals AI)85.3%84.1%Claude Opus 4.6
CaseLaw (Vals AI)62.1%Not measuredOnly Claude Opus 4.6 measured
CorpFin (Vals AI)67.0%60.7%Claude Opus 4.6
TaxEval (Vals AI)76.0%72.6%Claude Opus 4.6
MortgageTax (Vals AI)68.5%68.7%Gemini 3.5 Flash Lite
MedQA (Vals AI)95.4%Not measuredOnly Claude Opus 4.6 measured
MedCode (Vals AI)49.1%43.5%Claude Opus 4.6
SimpleQA Verified47.0%Not measuredOnly Claude Opus 4.6 measured
LMArena Text: science15191451Claude Opus 4.6
LMArena Text: medicine and healthcare15041438Claude Opus 4.6
LMArena Text: legal and government15121431Claude Opus 4.6
LMArena Text: business and finance14971423Claude Opus 4.6
FACTS Benchmark Suite41.5%53.5%Gemini 3.5 Flash Lite
Neither model has a result on the other 4 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for Claude Opus 4.6 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.6Gemini 3.5 Flash LiteLeader
Design Arena: websites1291Not measuredOnly Claude Opus 4.6 measured
Design Arena: UI components1281Not measuredOnly Claude Opus 4.6 measured
Design Arena: game dev1277Not measuredOnly Claude Opus 4.6 measured
Design Arena: data viz1279Not measuredOnly Claude Opus 4.6 measured
Design Arena: 3D1273Not measuredOnly Claude Opus 4.6 measured
Design Arena: all code categories1288Not measuredOnly Claude Opus 4.6 measured
Design Arena: SVG1227Not measuredOnly Claude Opus 4.6 measured
Design Arena: ASCII art1255Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index280
General benchmarks for Claude Opus 4.6 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.6Gemini 3.5 Flash LiteLeader
Public Benefits Bench (Vals AI)Not measured51.8%Only Gemini 3.5 Flash Lite measured
SAGE (Vals AI)51.6%47.3%Claude Opus 4.6
MedScribe (Vals AI)86.7%70.9%Claude Opus 4.6
IFBench53.1%Not measuredOnly Claude Opus 4.6 measured
Long context reasoning (AA-LCR)78.0%76.0%Claude Opus 4.6
DTBench91.2%83.5%Claude Opus 4.6
LMCA55.8%37.6%Claude Opus 4.6
CL-bench20.7%Not measuredOnly Claude Opus 4.6 measured
Furniture assembly28.3%Not measuredOnly Claude Opus 4.6 measured
CL-bench Life17.0%Not measuredOnly Claude Opus 4.6 measured
LMArena Text15011435Claude Opus 4.6
LMArena Text: instruction following15211419Claude Opus 4.6
LMArena Text: creative writing15051421Claude Opus 4.6
LMArena Vision13161269Claude Opus 4.6
LMArena Text: English15111438Claude Opus 4.6
LMArena Text: non-English14881427Claude Opus 4.6
LMArena Text: Chinese15511468Claude Opus 4.6
LMArena Text: German15001454Claude Opus 4.6
LMArena Text: Japanese14881426Claude Opus 4.6
LMArena Text: Korean14641407Claude Opus 4.6
LMArena Text: French15121451Claude Opus 4.6
LMArena Text: Spanish15101441Claude Opus 4.6
LMArena Text: Russian14971443Claude Opus 4.6
LMArena Text: Polish14991437Claude Opus 4.6
LMArena Text: multi-turn15111445Claude Opus 4.6
LMArena Text: longer queries15181435Claude Opus 4.6
LMArena Text: writing and language15021428Claude Opus 4.6
LMArena Text: entertainment and media14921414Claude Opus 4.6
LMArena Vision: English13241269Claude Opus 4.6
LMArena Vision: Chinese13701311Claude Opus 4.6
LMArena Vision: reading text13261280Claude Opus 4.6
LMArena Vision: humor13141287Claude Opus 4.6
LMArena Vision: recognizing things1274Not measuredOnly Claude Opus 4.6 measured
LMArena Vision: creative writing13311260Claude Opus 4.6
LMArena Document1507Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 11 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Opus 4.6 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.6Gemini 3.5 Flash LiteLeader
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

Claude Opus 4.6$0.018Fits in one request
Gemini 3.5 Flash Lite$0.0015Fits in one request

Gemini 3.5 Flash Lite costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.6$0.325Fits in one request
Gemini 3.5 Flash Lite$0.022Fits in one request

Gemini 3.5 Flash Lite costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.6$1.25Fits in one request
Gemini 3.5 Flash Lite$0.085Fits 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 Claude Opus 4.6 and Gemini 3.5 Flash Lite
SpecificationAnthropic Claude Opus 4.6Google Gemini 3.5 Flash Lite
MakerAnthropicGoogle
WeightsNo public weights listedNo public weights listed
ReleasedFebruary 4, 2026July 21, 2026
Context window1M1.05M
Input $/Mtok$5.00$0.30
Output $/Mtok$25.00$2.50
Coding index57.249.0
Independent measurements behind it43
Cost per solved task$1.56$0.41
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 4.6 better than Gemini 3.5 Flash Lite for coding?

Pick Claude Opus 4.6 for coding: it scores 57.2 on the Vibe Coding Index against 49.0 for Gemini 3.5 Flash Lite. Pick Gemini 3.5 Flash Lite for output tokens 10.0x cheaper ($2.50 vs $25.00 per million) and a lower cost per solved task ($0.41 against $1.56).

Which is cheaper, Claude Opus 4.6 or Gemini 3.5 Flash Lite?

Claude Opus 4.6 costs $5.00 per million input tokens and $25.00 per million output tokens; Gemini 3.5 Flash Lite costs $0.30 and $2.50. Per solved SWE-bench Verified task, Claude Opus 4.6 costs $1.56 and Gemini 3.5 Flash Lite $0.41.

Which has the bigger context window, Claude Opus 4.6 or Gemini 3.5 Flash Lite?

Gemini 3.5 Flash Lite, with 1.05M tokens against 1M.

How many benchmarks is the Claude Opus 4.6 vs Gemini 3.5 Flash Lite comparison based on?

71 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.6's coding index rests on 4 independent benchmarks and Gemini 3.5 Flash Lite's on 3. Where only one model has a result, the page says so instead of naming a winner.

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