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Claude Opus 4.8 vs Gemini 3.5 Flash Lite

Claude Opus 4.8 leads Gemini 3.5 Flash Lite on coding, 65.0 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; 82 benchmarks have a result for both.

Replace Claude Opus 4.8 Replace Gemini 3.5 Flash Lite
Claude Opus 4.8Anthropic
Coding
65.0
Overall
69.8
Output $/M
$25.00
80
Gemini 3.5 Flash LiteGoogle
Coding
49.0
Overall
49.8
Output $/M
$2.50
2
vs boards won of 82 shared

Claude Opus 4.8 or Gemini 3.5 Flash Lite: which to pick

Pick Claude Opus 4.8 for coding: it scores 65.0 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 $2.17).

Model AClaude Opus 4.8Anthropic65.0/1006 independent benchmarks$2.17 per solved taskModel BGemini 3.5 Flash LiteGoogle49.0/1003 independent benchmarks$0.41 per solved task
Shared results
82
Claude Opus 4.8 only
48
Gemini 3.5 Flash Lite only
3
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 4.8 65.0 from 6 benchmarks, Gemini 3.5 Flash Lite 49.0 from 3 benchmarks.
Widest category
Math, 35.4 points apart on average over 6 shared benchmarks.
Widest single gap
ARC-AGI-2: Claude Opus 4.8 72.1% against Gemini 3.5 Flash Lite 10.3%, 61.8 points apart on a 0 to 100 scale.
Output price
Claude Opus 4.8 $25.00 against Gemini 3.5 Flash Lite $2.50 per million output tokens, 10.0x apart.
Context window
Claude Opus 4.8 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 4.8BarsGemini 3.5 Flash LiteTies
Coding140
Intelligence20
Agentic work60
Reasoning140
Math60
Knowledge101
General281
All shared boards802
CodingLike-for-likeSix of these boards feed the Vibe Coding Index140
Coding benchmarks for Claude Opus 4.8 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.8Gemini 3.5 Flash LiteLeader
LiveBench coding77.3%Not measuredOnly Claude Opus 4.8 measured
LMArena WebDev15561435Claude Opus 4.8
AA Coding Index74.349.3Claude Opus 4.8
LiveCodeBench (Vals AI)87.8%79.0%Claude Opus 4.8
SWE-bench Verified (Vals AI)88.6%75.0%Claude Opus 4.8
Terminal-Bench 4 (Vals AI)23.2%Not measuredOnly Claude Opus 4.8 measured
Vibe Code Bench (Vals AI)82.7%37.2%Claude Opus 4.8
Code migration (Vals AI)47.3%6.2%Claude Opus 4.8
ProgramBench (Vals AI)1.0%0.0%Claude Opus 4.8
Terminal-Bench 2.1 (Vals AI)71.9%50.2%Claude Opus 4.8
SkillsBench (Vals AI)59.2%Not measuredOnly Claude Opus 4.8 measured
CyberBench (Vals AI)Not measured59.1%Only Gemini 3.5 Flash Lite measured
SciCode54.4%41.3%Claude Opus 4.8
Terminal-Bench Hard (Artificial Analysis run)58.3%Not measuredOnly Claude Opus 4.8 measured
FrontierCode46.5%Not measuredOnly Claude Opus 4.8 measured
GSO-Bench47.1%Not measuredOnly Claude Opus 4.8 measured
WeirdML82.9%39.0%Claude Opus 4.8
ALE-BenchNot measured765.3Only Gemini 3.5 Flash Lite measured
LMArena Text: coding14901453Claude Opus 4.8
LMArena Text: software and IT14881451Claude Opus 4.8
LMArena WebDev: React15571408Claude Opus 4.8
LMArena WebDev: HTML1543Not measuredOnly Claude Opus 4.8 measured
LMArena WebDev: from an imageNot measured1448Only Gemini 3.5 Flash Lite measured
SciCode12.3%6.2%Claude Opus 4.8
Neither model has a result on the other 15 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Opus 4.8 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.8Gemini 3.5 Flash LiteLeader
AA Intelligence Index41.822.2Claude Opus 4.8
Epoch Capabilities Index159.0144.9Claude Opus 4.8
Agentic workLike-for-likePublic boards, shown as published, kept out of the index60
Agentic work benchmarks for Claude Opus 4.8 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.8Gemini 3.5 Flash LiteLeader
AA Agentic Index41.914.3Claude Opus 4.8
Design Arena: agents building web apps1233Not measuredOnly Claude Opus 4.8 measured
Design Arena: agents building full-stack apps1249Not measuredOnly Claude Opus 4.8 measured
Design Arena: agents building mobile apps1222Not measuredOnly Claude Opus 4.8 measured
Design Arena: agents building Android apps1233Not measuredOnly Claude Opus 4.8 measured
Design Arena: agents building Godot games1231Not measuredOnly Claude Opus 4.8 measured
Design Arena: agents building games1239Not measuredOnly Claude Opus 4.8 measured
Design Arena: HTML slides1171Not measuredOnly Claude Opus 4.8 measured
Design Arena: PowerPoint slides1202Not measuredOnly Claude Opus 4.8 measured
Design Arena: spreadsheets1303Not measuredOnly Claude Opus 4.8 measured
LiveBench research81.8%Not measuredOnly Claude Opus 4.8 measured
LiveBench browser96.0%Not measuredOnly Claude Opus 4.8 measured
LiveBench long agentic48.3%Not measuredOnly Claude Opus 4.8 measured
Finance Agent (Vals AI)53.9%47.4%Claude Opus 4.8
Tax Agent Bench (Vals AI)30.0%7.2%Claude Opus 4.8
Legal Research Bench (Vals AI)43.8%13.9%Claude Opus 4.8
Excel Modeling Benchmark (Vals AI)69.4%43.2%Claude Opus 4.8
Terminal-Bench-Science (Vals AI)4.3%Not measuredOnly Claude Opus 4.8 measured
Time Horizon Index (Vals AI)11.8%Not measuredOnly Claude Opus 4.8 measured
τ²-Bench Telecom94.4%Not measuredOnly Claude Opus 4.8 measured
APEX-Agents48.9%29.3%Claude Opus 4.8
Remote Labor Index8.3%Not measuredOnly Claude Opus 4.8 measured
OSWorld 2.020.6%Not measuredOnly Claude Opus 4.8 measured
DeepResearch Bench50.2%Not measuredOnly Claude Opus 4.8 measured
PostTrainBench33.8%Not measuredOnly Claude Opus 4.8 measured
Vending-Bench 2$5,787Not measuredOnly Claude Opus 4.8 measured
LMArena Search1204Not measuredOnly Claude Opus 4.8 measured
Neither model has a result on the other 14 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index140
Reasoning benchmarks for Claude Opus 4.8 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.8Gemini 3.5 Flash LiteLeader
GPQA Diamond92.4%83.8%Claude Opus 4.8
LiveBench reasoning89.2%Not measuredOnly Claude Opus 4.8 measured
MMMU Pro (Vals AI)86.6%83.6%Claude Opus 4.8
GPQA Diamond (Artificial Analysis run)92.0%83.8%Claude Opus 4.8
Humanity's Last Exam (Artificial Analysis run)48.7%18.8%Claude Opus 4.8
GPQA Diamond (Epoch AI run)91.0%83.3%Claude Opus 4.8
ARC-AGI92.5%53.5%Claude Opus 4.8
ARC-AGI-272.1%10.3%Claude Opus 4.8
SimpleBench64.8%Not measuredOnly Claude Opus 4.8 measured
Chess puzzles52.0%21.0%Claude Opus 4.8
Mystery game puzzles36.0%19.0%Claude Opus 4.8
EBR-bench28.6%Not measuredOnly Claude Opus 4.8 measured
LMArena Text: hard prompts14821441Claude Opus 4.8
LMArena Text: expert15031434Claude Opus 4.8
LMArena Text: hard prompts in English14871440Claude Opus 4.8
LMArena Vision: diagrams13151284Claude Opus 4.8
LMArena Vision: homework13371291Claude Opus 4.8
Kagi LLM Benchmark88.8%Not measuredOnly Claude Opus 4.8 measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index60
Math benchmarks for Claude Opus 4.8 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.8Gemini 3.5 Flash LiteLeader
OTIS Mock AIME98.3%71.1%Claude Opus 4.8
FrontierMath, tiers 1 to 380.0%26.0%Claude Opus 4.8
FrontierMath, tier 456.1%0.0%Claude Opus 4.8
ProofBench69.0%13.0%Claude Opus 4.8
LMArena Text: math14861434Claude Opus 4.8
LMArena Text: mathematical work14971433Claude Opus 4.8
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index101
Knowledge benchmarks for Claude Opus 4.8 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.8Gemini 3.5 Flash LiteLeader
MMLU Pro89.6%85.8%Claude Opus 4.8
LegalBench (Vals AI)83.6%84.1%Gemini 3.5 Flash Lite
CorpFin (Vals AI)66.7%60.7%Claude Opus 4.8
TaxEval (Vals AI)75.6%72.6%Claude Opus 4.8
MortgageTax (Vals AI)69.9%68.7%Claude Opus 4.8
MedCode (Vals AI)53.2%43.5%Claude Opus 4.8
SimpleQA Verified53.0%Not measuredOnly Claude Opus 4.8 measured
LMArena Text: science14771451Claude Opus 4.8
LMArena Text: medicine and healthcare14641438Claude Opus 4.8
LMArena Text: legal and government14771431Claude Opus 4.8
LMArena Text: business and finance14581423Claude Opus 4.8
FACTS Benchmark Suite53.5%53.5%Claude Opus 4.8
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 Claude Opus 4.8 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.8Gemini 3.5 Flash LiteLeader
Design Arena: websites1258Not measuredOnly Claude Opus 4.8 measured
Design Arena: UI components1255Not measuredOnly Claude Opus 4.8 measured
Design Arena: game dev1264Not measuredOnly Claude Opus 4.8 measured
Design Arena: data viz1240Not measuredOnly Claude Opus 4.8 measured
Design Arena: 3D1222Not measuredOnly Claude Opus 4.8 measured
Design Arena: all code categories1255Not measuredOnly Claude Opus 4.8 measured
Design Arena: SVG1195Not measuredOnly Claude Opus 4.8 measured
Design Arena: ASCII art1277Not measuredOnly Claude Opus 4.8 measured
LiveBench design78.8%Not measuredOnly Claude Opus 4.8 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index281
General benchmarks for Claude Opus 4.8 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.8Gemini 3.5 Flash LiteLeader
LiveBench data analysis66.0%Not measuredOnly Claude Opus 4.8 measured
Public Benefits Bench (Vals AI)68.1%51.8%Claude Opus 4.8
SAGE (Vals AI)54.8%47.3%Claude Opus 4.8
MedScribe (Vals AI)85.8%70.9%Claude Opus 4.8
Vals Multimodal Index70.9%Not measuredOnly Claude Opus 4.8 measured
IFBench62.2%Not measuredOnly Claude Opus 4.8 measured
Long context reasoning (AA-LCR)77.7%76.0%Claude Opus 4.8
DTBench94.9%83.5%Claude Opus 4.8
LMCA57.5%37.6%Claude Opus 4.8
Surface Evolver Bench87.5%Not measuredOnly Claude Opus 4.8 measured
Furniture assembly42.5%Not measuredOnly Claude Opus 4.8 measured
LMArena Text14611435Claude Opus 4.8
LMArena Text: instruction following14761419Claude Opus 4.8
LMArena Text: creative writing14541421Claude Opus 4.8
LMArena Vision12941269Claude Opus 4.8
LMArena Text: English14681438Claude Opus 4.8
LMArena Text: non-English14501427Claude Opus 4.8
LMArena Text: Chinese15061468Claude Opus 4.8
LMArena Text: German14721454Claude Opus 4.8
LMArena Text: Japanese14421426Claude Opus 4.8
LMArena Text: Korean14311407Claude Opus 4.8
LMArena Text: French14811451Claude Opus 4.8
LMArena Text: Spanish14651441Claude Opus 4.8
LMArena Text: Russian14741443Claude Opus 4.8
LMArena Text: Polish14591437Claude Opus 4.8
LMArena Text: multi-turn14761445Claude Opus 4.8
LMArena Text: longer queries14831435Claude Opus 4.8
LMArena Text: writing and language14611428Claude Opus 4.8
LMArena Text: entertainment and media14401414Claude Opus 4.8
LMArena Vision: English12931269Claude Opus 4.8
LMArena Vision: Chinese13461311Claude Opus 4.8
LMArena Vision: reading text13031280Claude Opus 4.8
LMArena Vision: humor12821287Gemini 3.5 Flash Lite
LMArena Vision: creative writing13011260Claude Opus 4.8
LMArena Document1475Not measuredOnly Claude Opus 4.8 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 4.8 and Gemini 3.5 Flash Lite
BenchmarkClaude Opus 4.8Gemini 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 4.8$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 4.8$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 4.8$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 4.8 and Gemini 3.5 Flash Lite
SpecificationAnthropic Claude Opus 4.8Google Gemini 3.5 Flash Lite
MakerAnthropicGoogle
WeightsNo public weights listedNo public weights listed
ReleasedMay 27, 2026July 21, 2026
Context window1M1.05M
Input $/Mtok$5.00$0.30
Output $/Mtok$25.00$2.50
Coding index65.049.0
Independent measurements behind it63
Cost per solved task$2.17$0.41
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 4.8 better than Gemini 3.5 Flash Lite for coding?

Pick Claude Opus 4.8 for coding: it scores 65.0 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 $2.17).

Which is cheaper, Claude Opus 4.8 or Gemini 3.5 Flash Lite?

Claude Opus 4.8 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 4.8 costs $2.17 and Gemini 3.5 Flash Lite $0.41.

Which has the bigger context window, Claude Opus 4.8 or Gemini 3.5 Flash Lite?

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

How many benchmarks is the Claude Opus 4.8 vs Gemini 3.5 Flash Lite comparison based on?

82 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.8's coding index rests on 6 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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