Claude Opus 4.6 vs Gemini 3.1 Pro Preview

Claude Opus 4.6 leads Gemini 3.1 Pro Preview on coding, 57.2 to 32.3 on the Vibe Coding Index, and Gemini 3.1 Pro Preview costs 2.1x less per output token ($12.00 vs $25.00 per million). Updated October 22, 2026; 103 benchmarks have a result for both.

Replace Claude Opus 4.6 Replace Gemini 3.1 Pro Preview

Claude Opus 4.6Anthropic

Coding: 57.2
Overall: 66.0
Output $/M: $25.00

Gemini 3.1 Pro PreviewGoogle

Coding: 32.3
Overall: 54.0
Output $/M: $12.00

vs boards won of 103 shared, 1 tied

Claude Opus 4.6 or Gemini 3.1 Pro Preview: which to pick

Pick Claude Opus 4.6 for coding: it scores 57.2 on the Vibe Coding Index against 32.3 for Gemini 3.1 Pro Preview.

Pick Gemini 3.1 Pro Preview for output tokens 2.1x cheaper ($12.00 vs $25.00 per million) and a lower cost per solved task ($0.99 against $1.56).

Model AClaude Opus 4.6Anthropic57.2/1004 independent benchmarks$1.56 per solved task Model BGemini 3.1 Pro PreviewGoogle32.3/1004 independent benchmarks$0.99 per solved task

103730

Shared results: 103
Claude Opus 4.6 only: 7
Gemini 3.1 Pro Preview only: 30
Like-for-like categories: 8 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.

Coding
Vibe Coding Index, six public coding benchmarks
Claude Opus 4.6
Claude Opus 4.6 scores 57.2 against 32.3.
4 benchmarks behind each score
Intelligence
AA Intelligence Index
Claude Opus 4.6
Claude Opus 4.6 leads, 31.9 against 29.7.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Gemini 3.1 Pro Preview has a AA Agentic Index result, 8.2.
Directional only
Reasoning
GPQA Diamond
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 95.5% against 89.7%.
Same board, both measured
Math
AIME
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 98.1% against 95.6%.
Same board, both measured
Knowledge
MMLU Pro
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 91.0% against 89.1%.
Same board, both measured
Web design
Design Arena: websites
Claude Opus 4.6
Claude Opus 4.6 leads, 1291 against 1233.
Same board, both measured
Long documents
Listed context window
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Gemini 3.1 Pro Preview
Claude Opus 4.6 $0.018, Gemini 3.1 Pro Preview $0.0080 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Gemini 3.1 Pro Preview
Claude Opus 4.6 $1.56, Gemini 3.1 Pro Preview $0.99.
Published attempt cost and pass rate

At a glance

Coding index: Claude Opus 4.6 57.2 from 4 benchmarks, Gemini 3.1 Pro Preview 32.3 from 4 benchmarks.
Widest category: Agentic work, 14.3 points apart on average over 10 shared benchmarks.
Widest single gap: Vending-Bench 2: Claude Opus 4.6 $8,018 against Gemini 3.1 Pro Preview $911, 44.4 points apart on a 0 to 100 scale.
Output price: Claude Opus 4.6 $25.00 against Gemini 3.1 Pro Preview $12.00 per million output tokens, 2.1x apart.
Context window: Claude Opus 4.6 takes 1M tokens, Gemini 3.1 Pro Preview 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
Category	Claude Opus 4.6	Gemini 3.1 Pro Preview	Ties
Coding	9	4
Intelligence	1	0
Agentic work	9	1
Reasoning	5	11
Math	4	2	1 tie
Knowledge	6	8
Web design	6	2
General	26	8
All shared boards	66	36	1 tie

CodingLike-for-likeSix of these boards feed the Vibe Coding Index94

Coding benchmarks for Claude Opus 4.6 and Gemini 3.1 Pro Preview
Benchmark	Claude Opus 4.6	Gemini 3.1 Pro Preview	Leader
SWE-bench Verified	75.6%	Not measured	Only Claude Opus 4.6 measured
SWE-bench Multilingual	72.0%	Not measured	Only Claude Opus 4.6 measured
LMArena WebDev	1547	1447	Claude Opus 4.6
AA Coding Index	Not measured	68.8	Only Gemini 3.1 Pro Preview measured
LiveCodeBench (Vals AI)	84.7%	88.5%	Gemini 3.1 Pro Preview
SWE-bench Verified (Vals AI)	78.2%	78.8%	Gemini 3.1 Pro Preview
Terminal-Bench 4 (Vals AI)	Not measured	2.5%	Only Gemini 3.1 Pro Preview measured
Vibe Code Bench (Vals AI)	57.6%	32.0%	Claude Opus 4.6
Code migration (Vals AI)	Not measured	17.3%	Only Gemini 3.1 Pro Preview measured
ProgramBench (Vals AI)	Not measured	0.0%	Only Gemini 3.1 Pro Preview measured
IOI (Vals AI)	Not measured	51.8%	Only Gemini 3.1 Pro Preview measured
Terminal-Bench 2.1 (Vals AI)	Not measured	70.8%	Only Gemini 3.1 Pro Preview measured
Vibe Code Bench 1-100 (Vals AI)	Not measured	6.7%	Only Gemini 3.1 Pro Preview measured
SciCode	Not measured	58.7%	Only Gemini 3.1 Pro Preview measured
Terminal-Bench Hard (Artificial Analysis run)	48.5%	53.8%	Gemini 3.1 Pro Preview
Terminal-Bench	79.8%	80.2%	Gemini 3.1 Pro Preview
FrontierCode	26.6%	Not measured	Only Claude Opus 4.6 measured
GSO-Bench	41.2%	22.6%	Claude Opus 4.6
WeirdML	78.0%	72.1%	Claude Opus 4.6
MirrorCode	Not measured	8.9%	Only Gemini 3.1 Pro Preview measured
Cybench	93.0%	Not measured	Only Claude Opus 4.6 measured
ALE-Bench	Not measured	1160.6	Only Gemini 3.1 Pro Preview measured
LMArena Text: coding	1534	1484	Claude Opus 4.6
LMArena Text: software and IT	1527	1487	Claude Opus 4.6
LMArena WebDev: React	1539	1438	Claude Opus 4.6
LMArena WebDev: HTML	1559	1490	Claude Opus 4.6
LMArena WebDev: from an image	1543	1481	Claude Opus 4.6
SciCode	Not measured	14.3%	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 11 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10

Intelligence benchmarks for Claude Opus 4.6 and Gemini 3.1 Pro Preview
Benchmark	Claude Opus 4.6	Gemini 3.1 Pro Preview	Leader
AA Intelligence Index	31.9	29.7	Claude Opus 4.6
Epoch Capabilities Index	155.7	Not measured	Only Claude Opus 4.6 measured

Agentic workLike-for-likePublic boards, shown as published, kept out of the index91

Agentic work benchmarks for Claude Opus 4.6 and Gemini 3.1 Pro Preview
Benchmark	Claude Opus 4.6	Gemini 3.1 Pro Preview	Leader
AA Agentic Index	Not measured	8.2	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building web apps	1206	1125	Claude Opus 4.6
Design Arena: agents building full-stack apps	1220	1068	Claude Opus 4.6
Design Arena: agents building mobile apps	1207	1094	Claude Opus 4.6
Design Arena: agents building Android apps	1197	1049	Claude Opus 4.6
Design Arena: agents building Godot games	Not measured	1236	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building games	1212	1113	Claude Opus 4.6
Design Arena: HTML slides	Not measured	1103	Only Gemini 3.1 Pro Preview measured
Design Arena: PowerPoint slides	Not measured	1041	Only Gemini 3.1 Pro Preview measured
SREBench (Vals AI)	Not measured	0.0%	Only Gemini 3.1 Pro Preview measured
Finance Agent (Vals AI)	Not measured	43.0%	Only Gemini 3.1 Pro Preview measured
Tax Agent Bench (Vals AI)	Not measured	9.3%	Only Gemini 3.1 Pro Preview measured
Legal Research Bench (Vals AI)	Not measured	20.7%	Only Gemini 3.1 Pro Preview measured
Excel Modeling Benchmark (Vals AI)	Not measured	52.6%	Only Gemini 3.1 Pro Preview measured
BioMysteryBench (Vals AI)	Not measured	60.0%	Only Gemini 3.1 Pro Preview measured
Terminal-Bench-Science (Vals AI)	Not measured	1.4%	Only Gemini 3.1 Pro Preview measured
Vals Science Index	Not measured	27.4%	Only Gemini 3.1 Pro Preview measured
τ²-Bench Telecom	92.1%	95.6%	Gemini 3.1 Pro Preview
APEX-Agents	46.3%	35.1%	Claude Opus 4.6
METR time horizons	78.9%	77.0%	Claude Opus 4.6
Remote Labor Index	4.2%	Not measured	Only Claude Opus 4.6 measured
BALROG	Not measured	57.0%	Only Gemini 3.1 Pro Preview measured
DeepResearch Bench	55.3%	47.8%	Claude Opus 4.6
PostTrainBench	Not measured	22.0%	Only Gemini 3.1 Pro Preview measured
Vending-Bench 2	$8,018	$911	Claude Opus 4.6
Neither model has a result on the other 16 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index511

Reasoning benchmarks for Claude Opus 4.6 and Gemini 3.1 Pro Preview
Benchmark	Claude Opus 4.6	Gemini 3.1 Pro Preview	Leader
GPQA Diamond	89.7%	95.5%	Gemini 3.1 Pro Preview
MysteryMechanism (Vals AI)	Not measured	20.7%	Only Gemini 3.1 Pro Preview measured
MMMU Pro (Vals AI)	83.9%	88.2%	Gemini 3.1 Pro Preview
GPQA Diamond (Artificial Analysis run)	89.6%	94.1%	Gemini 3.1 Pro Preview
Humanity's Last Exam (Artificial Analysis run)	39.9%	47.0%	Gemini 3.1 Pro Preview
GPQA Diamond (Epoch AI run)	90.5%	94.4%	Gemini 3.1 Pro Preview
ARC-AGI	94.0%	98.0%	Gemini 3.1 Pro Preview
ARC-AGI-2	69.2%	77.1%	Gemini 3.1 Pro Preview
SimpleBench	67.6%	79.6%	Gemini 3.1 Pro Preview
Chess puzzles	21.0%	51.0%	Gemini 3.1 Pro Preview
Mystery game puzzles	25.0%	34.0%	Gemini 3.1 Pro Preview
EBR-bench	12.7%	14.3%	Gemini 3.1 Pro Preview
LMArena Text: hard prompts	1525	1485	Claude Opus 4.6
LMArena Text: expert	1544	1483	Claude Opus 4.6
LMArena Text: hard prompts in English	1530	1480	Claude Opus 4.6
LMArena Vision: diagrams	1340	1311	Claude Opus 4.6
LMArena Vision: homework	1337	1316	Claude Opus 4.6
Kagi LLM Benchmark	83.6%	Not measured	Only Claude Opus 4.6 measured
Neither model has a result on the other 4 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index42

Math benchmarks for Claude Opus 4.6 and Gemini 3.1 Pro Preview
Benchmark	Claude Opus 4.6	Gemini 3.1 Pro Preview	Leader
AIME	95.6%	98.1%	Gemini 3.1 Pro Preview
OTIS Mock AIME	94.4%	95.6%	Gemini 3.1 Pro Preview
FrontierMath, tiers 1 to 3	66.0%	59.6%	Claude Opus 4.6
FrontierMath, tier 4	26.8%	26.8%	Tie
ProofBench	50.0%	26.0%	Claude Opus 4.6
LMArena Text: math	1518	1486	Claude Opus 4.6
LMArena Text: mathematical work	1525	1478	Claude 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 index68

Knowledge benchmarks for Claude Opus 4.6 and Gemini 3.1 Pro Preview
Benchmark	Claude Opus 4.6	Gemini 3.1 Pro Preview	Leader
MMLU Pro	89.1%	91.0%	Gemini 3.1 Pro Preview
LegalBench (Vals AI)	85.3%	87.4%	Gemini 3.1 Pro Preview
CaseLaw (Vals AI)	62.1%	64.8%	Gemini 3.1 Pro Preview
CorpFin (Vals AI)	67.0%	64.5%	Claude Opus 4.6
TaxEval (Vals AI)	76.0%	72.9%	Claude Opus 4.6
MortgageTax (Vals AI)	68.5%	69.4%	Gemini 3.1 Pro Preview
MedQA (Vals AI)	95.4%	96.4%	Gemini 3.1 Pro Preview
MedCode (Vals AI)	49.1%	59.1%	Gemini 3.1 Pro Preview
SimpleQA Verified	47.0%	73.5%	Gemini 3.1 Pro Preview
LMArena Text: science	1519	1497	Claude Opus 4.6
LMArena Text: medicine and healthcare	1504	1486	Claude Opus 4.6
LMArena Text: legal and government	1512	1487	Claude Opus 4.6
LMArena Text: business and finance	1497	1459	Claude Opus 4.6
FACTS Benchmark Suite	41.5%	67.4%	Gemini 3.1 Pro Preview
Neither model has a result on the other 4 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index62

Web design benchmarks for Claude Opus 4.6 and Gemini 3.1 Pro Preview
Benchmark	Claude Opus 4.6	Gemini 3.1 Pro Preview	Leader
Design Arena: websites	1291	1233	Claude Opus 4.6
Design Arena: UI components	1281	1224	Claude Opus 4.6
Design Arena: game dev	1277	1202	Claude Opus 4.6
Design Arena: data viz	1279	1209	Claude Opus 4.6
Design Arena: 3D	1273	1234	Claude Opus 4.6
Design Arena: all code categories	1288	1231	Claude Opus 4.6
Design Arena: SVG	1227	1285	Gemini 3.1 Pro Preview
Design Arena: ASCII art	1255	1270	Gemini 3.1 Pro Preview
Neither model has a result on the other 1 board here

GeneralLike-for-likePublic boards, shown as published, kept out of the index268

General benchmarks for Claude Opus 4.6 and Gemini 3.1 Pro Preview
Benchmark	Claude Opus 4.6	Gemini 3.1 Pro Preview	Leader
Public Benefits Bench (Vals AI)	Not measured	53.8%	Only Gemini 3.1 Pro Preview measured
SAGE (Vals AI)	51.6%	48.7%	Claude Opus 4.6
MedScribe (Vals AI)	86.7%	76.1%	Claude Opus 4.6
Vals Multimodal Index	Not measured	56.1%	Only Gemini 3.1 Pro Preview measured
IFBench	53.1%	77.1%	Gemini 3.1 Pro Preview
Long context reasoning (AA-LCR)	78.0%	82.0%	Gemini 3.1 Pro Preview
DTBench	91.2%	97.1%	Gemini 3.1 Pro Preview
LMCA	55.8%	53.8%	Claude Opus 4.6
CL-bench	20.7%	20.8%	Gemini 3.1 Pro Preview
Furniture assembly	28.3%	26.7%	Claude Opus 4.6
ExploitBench	Not measured	26.1%	Only Gemini 3.1 Pro Preview measured
CL-bench Life	17.0%	16.9%	Claude Opus 4.6
LMArena Text	1501	1480	Claude Opus 4.6
LMArena Text: instruction following	1521	1466	Claude Opus 4.6
LMArena Text: creative writing	1505	1482	Claude Opus 4.6
LMArena Vision	1316	1296	Claude Opus 4.6
LMArena Text: English	1511	1478	Claude Opus 4.6
LMArena Text: non-English	1488	1476	Claude Opus 4.6
LMArena Text: Chinese	1551	1527	Claude Opus 4.6
LMArena Text: German	1500	1490	Claude Opus 4.6
LMArena Text: Japanese	1488	1491	Gemini 3.1 Pro Preview
LMArena Text: Korean	1464	1455	Claude Opus 4.6
LMArena Text: French	1512	1487	Claude Opus 4.6
LMArena Text: Spanish	1510	1481	Claude Opus 4.6
LMArena Text: Russian	1497	1497	Gemini 3.1 Pro Preview
LMArena Text: Polish	1499	1498	Claude Opus 4.6
LMArena Text: multi-turn	1511	1487	Claude Opus 4.6
LMArena Text: longer queries	1518	1482	Claude Opus 4.6
LMArena Text: writing and language	1502	1481	Claude Opus 4.6
LMArena Text: entertainment and media	1492	1465	Claude Opus 4.6
LMArena Vision: English	1324	1287	Claude Opus 4.6
LMArena Vision: Chinese	1370	1364	Claude Opus 4.6
LMArena Vision: reading text	1326	1304	Claude Opus 4.6
LMArena Vision: humor	1314	1322	Gemini 3.1 Pro Preview
LMArena Vision: captioning	Not measured	1345	Only Gemini 3.1 Pro Preview measured
LMArena Vision: recognizing things	1274	1330	Gemini 3.1 Pro Preview
LMArena Vision: creative writing	1331	1324	Claude Opus 4.6
LMArena Document	1507	1444	Claude Opus 4.6
Neither model has a result on the other 8 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 3.1 Pro Preview
Benchmark	Claude Opus 4.6	Gemini 3.1 Pro Preview	Leader
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 3.1 Pro Preview$0.0080Fits in one request

Gemini 3.1 Pro Preview costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.6$0.325Fits in one request

Gemini 3.1 Pro Preview$0.136Fits in one request

Gemini 3.1 Pro Preview costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.6$1.25Fits in one request

Gemini 3.1 Pro Preview$0.520Fits in one request

Gemini 3.1 Pro Preview 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 3.1 Pro Preview
Specification	Anthropic Claude Opus 4.6	Google Gemini 3.1 Pro Preview
Maker	Anthropic	Google
Weights	No public weights listed	No public weights listed
Released	February 4, 2026	February 19, 2026
Context window	1M	1.05M
Input $/Mtok	$5.00	$2.00
Output $/Mtok	$25.00	$12.00
Coding index	57.2	32.3
Independent measurements behind it	4	4
Cost per solved task	$1.56	$0.99
Source	OpenRouter listing	OpenRouter listing

Questions

Is Claude Opus 4.6 better than Gemini 3.1 Pro Preview for coding?

Pick Claude Opus 4.6 for coding: it scores 57.2 on the Vibe Coding Index against 32.3 for Gemini 3.1 Pro Preview. Pick Gemini 3.1 Pro Preview for output tokens 2.1x cheaper ($12.00 vs $25.00 per million) and a lower cost per solved task ($0.99 against $1.56).

Which is cheaper, Claude Opus 4.6 or Gemini 3.1 Pro Preview?

Claude Opus 4.6 costs $5.00 per million input tokens and $25.00 per million output tokens; Gemini 3.1 Pro Preview costs $2.00 and $12.00. Per solved SWE-bench Verified task, Claude Opus 4.6 costs $1.56 and Gemini 3.1 Pro Preview $0.99.

Which has the bigger context window, Claude Opus 4.6 or Gemini 3.1 Pro Preview?

Gemini 3.1 Pro Preview, with 1.05M tokens against 1M.

How many benchmarks is the Claude Opus 4.6 vs Gemini 3.1 Pro Preview comparison based on?

103 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 3.1 Pro Preview's on 4. Where only one model has a result, the page says so instead of naming a winner.

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Claude Opus 4.6 or Gemini 3.1 Pro Preview: which to pick

Which one for your work

Coding

Intelligence

Agentic work

Reasoning

Math

Knowledge

Web design

Long documents

Everyday cost

Cost per solved task

At a glance

Benchmark by benchmark

What each workload costs

Chat turn

Repository review

Agent loop

Specification differences

Questions

Compare next