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Claude Opus 5 vs GPT-6.1 Sol

Updated October 21, 2026. 89 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Opus 5 Replace GPT-6.1 Sol
Claude Opus 5Anthropic
Coding
81.8
Overall
50.8
Output $/M
$25.00
49
GPT-6.1 SolOpenAI
Coding
88.7
Overall
51.8
Output $/M
$10.00
38
vs boards won of 89 shared, 2 tied

Decision reading

Pick GPT-6.1 Sol for coding: it scores 88.7 on the Vibe Coding Index against 81.8 for Claude Opus 5.

Pick Claude Opus 5 when what matters is CyberBench (Vals AI) or SciCode, where it leads.

Model AClaude Opus 5Anthropic81.8/1002 independent benchmarks$1.33 per solved taskModel BGPT-6.1 SolOpenAI88.7/1002 independent benchmarksNo cost per solved task
Shared results
89
Claude Opus 5 only
41
GPT-6.1 Sol only
6
Like-for-like categories
8 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

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 5 81.8 from 2 benchmarks, GPT-6.1 Sol 88.7 from 2 benchmarks.
Widest category
Agentic work, 13.2 points apart on average over 13 shared benchmarks.
Widest single gap
SREBench (Vals AI): Claude Opus 5 12.2% against GPT-6.1 Sol 50.8%, 38.5 points apart on a 0 to 100 scale.
Output price
Claude Opus 5 $25.00 against GPT-6.1 Sol $10.00 per million output tokens, 2.5x apart.
Context window
Claude Opus 5 takes 1M tokens, GPT-6.1 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
CategoryClaude Opus 5BarsGPT-6.1 SolTies
Coding5101 tie
Intelligence02
Agentic work76
Reasoning59
Math231 tie
Knowledge51
Web design34
General223
All shared boards49382 ties
CodingLike-for-likeFour of these boards feed the Vibe Coding Index510
Coding benchmarks for Claude Opus 5 and GPT-6.1 Sol
BenchmarkClaude Opus 5GPT-6.1 SolLeader
LiveBench coding90.8%96.0%GPT-6.1 Sol
LMArena WebDev16891753GPT-6.1 Sol
AA Coding Index78.0Not measuredOnly Claude Opus 5 measured
LiveCodeBench (Vals AI)89.0%Not measuredOnly Claude Opus 5 measured
SWE-bench Verified (Vals AI)97.0%Not measuredOnly Claude Opus 5 measured
Terminal-Bench 4 (Vals AI)53.5%55.0%GPT-6.1 Sol
Vibe Code Bench (Vals AI)88.4%88.9%GPT-6.1 Sol
Code migration (Vals AI)57.5%65.1%GPT-6.1 Sol
ProgramBench (Vals AI)3.0%3.0%Tie
IOI (Vals AI)84.3%96.9%GPT-6.1 Sol
Terminal-Bench 2.1 (Vals AI)84.6%Not measuredOnly Claude Opus 5 measured
SWE-bench Multimodal (Vals AI)Not measured43.5%Only GPT-6.1 Sol measured
Vibe Code Bench 1-100 (Vals AI)28.5%Not measuredOnly Claude Opus 5 measured
SkillsBench (Vals AI)60.4%Not measuredOnly Claude Opus 5 measured
CyberBench (Vals AI)65.4%39.3%Claude Opus 5
SciCode56.4%55.8%Claude Opus 5
FrontierCode53.4%50.2%Claude Opus 5
FrontierSWE52.0%Not measuredOnly Claude Opus 5 measured
WeirdML91.8%Not measuredOnly Claude Opus 5 measured
ALE-Bench2164.62743.8GPT-6.1 Sol
LMArena Text: coding15331478Claude Opus 5
LMArena Text: software and IT15271476Claude Opus 5
LMArena WebDev: React17111754GPT-6.1 Sol
LMArena WebDev: HTML16801800GPT-6.1 Sol
LMArena WebDev: from an image16621702GPT-6.1 Sol
Neither model has a result on the other 13 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Claude Opus 5 and GPT-6.1 Sol
BenchmarkClaude Opus 5GPT-6.1 SolLeader
AA Intelligence Index50.851.8GPT-6.1 Sol
Epoch Capabilities Index163.9168.4GPT-6.1 Sol
Agentic workLike-for-likePublic boards, shown as published, kept out of the index76
Agentic work benchmarks for Claude Opus 5 and GPT-6.1 Sol
BenchmarkClaude Opus 5GPT-6.1 SolLeader
AA Agentic Index56.5Not measuredOnly Claude Opus 5 measured
Design Arena: agents building web apps1266Not measuredOnly Claude Opus 5 measured
Design Arena: agents building full-stack apps1306Not measuredOnly Claude Opus 5 measured
Design Arena: agents building mobile apps13481190Claude Opus 5
Design Arena: agents building Android apps1258Not measuredOnly Claude Opus 5 measured
Design Arena: agents building Godot games1279Not measuredOnly Claude Opus 5 measured
Design Arena: agents building games1261Not measuredOnly Claude Opus 5 measured
Design Arena: PowerPoint slides1265Not measuredOnly Claude Opus 5 measured
Design Arena: spreadsheetsNot measured1250Only GPT-6.1 Sol measured
LiveBench research88.9%83.5%Claude Opus 5
LiveBench browser84.0%88.0%GPT-6.1 Sol
LiveBench long agentic62.1%73.0%GPT-6.1 Sol
SREBench (Vals AI)12.2%50.8%GPT-6.1 Sol
Finance Agent (Vals AI)58.6%52.0%Claude Opus 5
Tax Agent Bench (Vals AI)45.5%21.8%Claude Opus 5
Legal Research Bench (Vals AI)55.3%38.5%Claude Opus 5
Harvey's Legal Agent Benchmark (Vals AI)Not measured6.3%Only GPT-6.1 Sol measured
Excel Modeling Benchmark (Vals AI)73.6%70.8%Claude Opus 5
BioMysteryBench (Vals AI)79.3%79.6%GPT-6.1 Sol
Terminal-Bench-Science (Vals AI)27.1%52.9%GPT-6.1 Sol
Vals Science Index47.9%59.6%GPT-6.1 Sol
Time Horizon Index (Vals AI)18.8%Not measuredOnly Claude Opus 5 measured
CUA-bench (Vals AI)9.0%Not measuredOnly Claude Opus 5 measured
Robo-bench (Vals AI)Not measured28.3%Only GPT-6.1 Sol measured
APEX-Agents65.8%60.0%Claude Opus 5
OSWorld 2.031.4%Not measuredOnly Claude Opus 5 measured
BALROG63.4%Not measuredOnly Claude Opus 5 measured
PostTrainBench35.0%Not measuredOnly Claude Opus 5 measured
SpireClimbNot measured24.7%Only GPT-6.1 Sol measured
Vending-Bench 2$11,182Not measuredOnly Claude Opus 5 measured
LMArena Search1242Not measuredOnly Claude Opus 5 measured
Neither model has a result on the other 8 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index59
Reasoning benchmarks for Claude Opus 5 and GPT-6.1 Sol
BenchmarkClaude Opus 5GPT-6.1 SolLeader
GPQA Diamond93.4%Not measuredOnly Claude Opus 5 measured
LiveBench reasoning91.2%92.6%GPT-6.1 Sol
MysteryMechanism (Vals AI)37.4%46.4%GPT-6.1 Sol
MMMU Pro (Vals AI)89.9%Not measuredOnly Claude Opus 5 measured
GPQA Diamond (Artificial Analysis run)93.7%Not measuredOnly Claude Opus 5 measured
Humanity's Last Exam (Artificial Analysis run)54.9%52.9%Claude Opus 5
GPQA Diamond (Epoch AI run)93.9%95.4%GPT-6.1 Sol
ARC-AGI97.5%98.5%GPT-6.1 Sol
ARC-AGI-290.4%94.2%GPT-6.1 Sol
SimpleBench80.6%Not measuredOnly Claude Opus 5 measured
Chess puzzles43.0%68.0%GPT-6.1 Sol
Mystery game puzzles59.0%80.0%GPT-6.1 Sol
EBR-bench45.7%54.3%GPT-6.1 Sol
LMArena Text: hard prompts15271463Claude Opus 5
LMArena Text: expert15541489Claude Opus 5
LMArena Text: hard prompts in English15231465Claude Opus 5
LMArena Vision: diagrams13481306Claude Opus 5
LMArena Vision: homework13381356GPT-6.1 Sol
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index23
Math benchmarks for Claude Opus 5 and GPT-6.1 Sol
BenchmarkClaude Opus 5GPT-6.1 SolLeader
OTIS Mock AIME98.9%100.0%GPT-6.1 Sol
FrontierMath, tiers 1 to 385.6%93.7%GPT-6.1 Sol
FrontierMath, tier 473.2%100.0%GPT-6.1 Sol
ProofBench99.0%99.0%Tie
LMArena Text: math15331489Claude Opus 5
LMArena Text: mathematical work15441513Claude Opus 5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index51
Knowledge benchmarks for Claude Opus 5 and GPT-6.1 Sol
BenchmarkClaude Opus 5GPT-6.1 SolLeader
MMLU Pro91.6%Not measuredOnly Claude Opus 5 measured
LegalBench (Vals AI)87.0%Not measuredOnly Claude Opus 5 measured
CorpFin (Vals AI)73.2%Not measuredOnly Claude Opus 5 measured
TaxEval (Vals AI)75.1%Not measuredOnly Claude Opus 5 measured
MortgageTax (Vals AI)72.1%Not measuredOnly Claude Opus 5 measured
MedCode (Vals AI)63.6%48.8%Claude Opus 5
SimpleQA Verified59.9%73.9%GPT-6.1 Sol
LMArena Text: science15311444Claude Opus 5
LMArena Text: medicine and healthcare15251433Claude Opus 5
LMArena Text: legal and government15301471Claude Opus 5
LMArena Text: business and finance15011445Claude Opus 5
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index34
Web design benchmarks for Claude Opus 5 and GPT-6.1 Sol
BenchmarkClaude Opus 5GPT-6.1 SolLeader
Design Arena: websites13091321GPT-6.1 Sol
Design Arena: UI components13481321Claude Opus 5
Design Arena: game dev13391389GPT-6.1 Sol
Design Arena: data viz13291278Claude Opus 5
Design Arena: 3D13351461GPT-6.1 Sol
Design Arena: all code categories13241345GPT-6.1 Sol
Design Arena: SVG1310Not measuredOnly Claude Opus 5 measured
Design Arena: ASCII art1352Not measuredOnly Claude Opus 5 measured
LiveBench design83.0%82.1%Claude Opus 5
GeneralLike-for-likePublic boards, shown as published, kept out of the index223
General benchmarks for Claude Opus 5 and GPT-6.1 Sol
BenchmarkClaude Opus 5GPT-6.1 SolLeader
Vals IndexNot measured63.9%Only GPT-6.1 Sol measured
LiveBench data analysis74.6%82.7%GPT-6.1 Sol
Public Benefits Bench (Vals AI)76.9%59.3%Claude Opus 5
SAGE (Vals AI)49.4%46.5%Claude Opus 5
MedScribe (Vals AI)91.0%86.5%Claude Opus 5
Vals Multimodal Index73.9%Not measuredOnly Claude Opus 5 measured
Long context reasoning (AA-LCR)82.0%84.0%GPT-6.1 Sol
DTBench97.9%96.5%Claude Opus 5
LMCA64.5%62.8%Claude Opus 5
Furniture assembly60.8%80.0%GPT-6.1 Sol
LMArena Text15091443Claude Opus 5
LMArena Text: instruction following15181466Claude Opus 5
LMArena Text: creative writing14931425Claude Opus 5
LMArena Vision13201288Claude Opus 5
LMArena Text: English15081450Claude Opus 5
LMArena Text: non-English15021433Claude Opus 5
LMArena Text: Chinese15731487Claude Opus 5
LMArena Text: German1527Not measuredOnly Claude Opus 5 measured
LMArena Text: Japanese1520Not measuredOnly Claude Opus 5 measured
LMArena Text: Korean1517Not measuredOnly Claude Opus 5 measured
LMArena Text: French15191460Claude Opus 5
LMArena Text: Spanish15231439Claude Opus 5
LMArena Text: Russian15071457Claude Opus 5
LMArena Text: Polish1522Not measuredOnly Claude Opus 5 measured
LMArena Text: multi-turn15001442Claude Opus 5
LMArena Text: longer queries15171458Claude Opus 5
LMArena Text: writing and language14991444Claude Opus 5
LMArena Text: entertainment and media14811426Claude Opus 5
LMArena Vision: English13151274Claude Opus 5
LMArena Vision: Chinese1400Not measuredOnly Claude Opus 5 measured
LMArena Vision: reading text13291289Claude Opus 5
LMArena Vision: humor1293Not measuredOnly Claude Opus 5 measured
LMArena Vision: creative writing13131301Claude Opus 5
LMArena Document1516Not measuredOnly Claude Opus 5 measured
Neither model has a result on the other 12 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Opus 5 and GPT-6.1 Sol
BenchmarkClaude Opus 5GPT-6.1 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

Claude Opus 5$0.018Fits in one request
GPT-6.1 Sol$0.0070Fits in one request

GPT-6.1 Sol costs less

Repository review

50K input + 3K output tokens

Claude Opus 5$0.325Fits in one request
GPT-6.1 Sol$0.130Fits in one request

GPT-6.1 Sol costs less

Agent loop

200K input + 10K output tokens

Claude Opus 5$1.25Fits in one request
GPT-6.1 Sol$0.500Fits in one request

GPT-6.1 Sol 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 5 and GPT-6.1 Sol
SpecificationAnthropic Claude Opus 5OpenAI GPT-6.1 Sol
MakerAnthropicOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedJuly 24, 2026September 29, 2026
Context window1M1.05M
Input $/Mtok$5.00$2.00
Output $/Mtok$25.00$10.00
Coding index81.888.7
Independent measurements behind it22
Cost per solved task$1.33Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 5 better than GPT-6.1 Sol for coding?

Pick GPT-6.1 Sol for coding: it scores 88.7 on the Vibe Coding Index against 81.8 for Claude Opus 5. Pick Claude Opus 5 when what matters is CyberBench (Vals AI) or SciCode, where it leads.

Which is cheaper, Claude Opus 5 or GPT-6.1 Sol?

Claude Opus 5 costs $5.00 per million input tokens and $25.00 per million output tokens; GPT-6.1 Sol costs $2.00 and $10.00. Cost per solved task is known for Claude Opus 5 only.

Which has the bigger context window, Claude Opus 5 or GPT-6.1 Sol?

GPT-6.1 Sol, with 1.05M tokens against 1M.

How many benchmarks is the Claude Opus 5 vs GPT-6.1 Sol comparison based on?

89 benchmarks have a result for both models as of October 21, 2026. Claude Opus 5's coding index rests on 2 independent benchmarks and GPT-6.1 Sol's on 2. Where only one model has a result, the page says so instead of naming a winner.

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