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Claude Opus 5 vs GPT-6 Sol

Updated October 21, 2026. 99 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 Sol
Claude Opus 5Anthropic
Coding
81.8
Overall
50.8
Output $/M
$25.00
79
GPT-6 SolOpenAI
Coding
82.8
Overall
47.6
Output $/M
$10.00
20
vs boards won of 99 shared

Decision reading

Claude Opus 5 and GPT-6 Sol are level for coding, 81.8 against 82.8 on the Vibe Coding Index, so price and context decide.

Pick Claude Opus 5 when what matters is LMArena WebDev or Terminal-Bench 4 (Vals AI), where it leads. Pick GPT-6 Sol when output tokens cost 2.5x less, or when the context window is larger, 1.05M against 1M tokens.

Model AClaude Opus 5Anthropic81.8/1002 independent benchmarks$1.33 per solved taskModel BGPT-6 SolOpenAI82.8/1002 independent benchmarksNo cost per solved task
Shared results
99
Claude Opus 5 only
31
GPT-6 Sol only
1
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 Sol 82.8 from 2 benchmarks.
Widest category
Knowledge, 18.3 points apart on average over 6 shared benchmarks.
Widest single gap
Tax Agent Bench (Vals AI): Claude Opus 5 45.5% against GPT-6 Sol 15.0%, 30.5 points apart on a 0 to 100 scale.
Output price
Claude Opus 5 $25.00 against GPT-6 Sol $10.00 per million output tokens, 2.5x apart.
Context window
Claude Opus 5 takes 1M 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
CategoryClaude Opus 5BarsGPT-6 SolTies
Coding125
Intelligence20
Agentic work115
Reasoning113
Math33
Knowledge51
Web design81
General272
All shared boards7920
CodingLike-for-likeFour of these boards feed the Vibe Coding Index125
Coding benchmarks for Claude Opus 5 and GPT-6 Sol
BenchmarkClaude Opus 5GPT-6 SolLeader
LiveBench coding90.8%93.1%GPT-6 Sol
LMArena WebDev16891683Claude Opus 5
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%44.4%Claude Opus 5
Vibe Code Bench (Vals AI)88.4%87.8%Claude Opus 5
Code migration (Vals AI)57.5%57.2%Claude Opus 5
ProgramBench (Vals AI)3.0%2.0%Claude Opus 5
IOI (Vals AI)84.3%82.6%Claude Opus 5
Terminal-Bench 2.1 (Vals AI)84.6%83.2%Claude Opus 5
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%78.0%GPT-6 Sol
SciCode56.4%57.6%GPT-6 Sol
FrontierCode53.4%49.3%Claude Opus 5
FrontierSWE52.0%Not measuredOnly Claude Opus 5 measured
WeirdML91.8%Not measuredOnly Claude Opus 5 measured
ALE-Bench2164.62462.0GPT-6 Sol
LMArena Text: coding15331448Claude Opus 5
LMArena Text: software and IT15271433Claude Opus 5
LMArena WebDev: React17111685Claude Opus 5
LMArena WebDev: HTML16801685GPT-6 Sol
LMArena WebDev: from an image16621660Claude Opus 5
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 5 and GPT-6 Sol
BenchmarkClaude Opus 5GPT-6 SolLeader
AA Intelligence Index50.847.6Claude Opus 5
Epoch Capabilities Index163.9163.7Claude Opus 5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index115
Agentic work benchmarks for Claude Opus 5 and GPT-6 Sol
BenchmarkClaude Opus 5GPT-6 SolLeader
AA Agentic Index56.5Not measuredOnly Claude Opus 5 measured
Design Arena: agents building web apps12661232Claude Opus 5
Design Arena: agents building full-stack apps13061238Claude Opus 5
Design Arena: agents building mobile apps13481216Claude 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
LiveBench research88.9%69.3%Claude Opus 5
LiveBench browser84.0%92.0%GPT-6 Sol
LiveBench long agentic62.1%66.9%GPT-6 Sol
SREBench (Vals AI)12.2%30.5%GPT-6 Sol
Finance Agent (Vals AI)58.6%49.0%Claude Opus 5
Tax Agent Bench (Vals AI)45.5%15.0%Claude Opus 5
Legal Research Bench (Vals AI)55.3%28.9%Claude Opus 5
Excel Modeling Benchmark (Vals AI)73.6%71.5%Claude Opus 5
BioMysteryBench (Vals AI)79.3%74.8%Claude Opus 5
Terminal-Bench-Science (Vals AI)27.1%30.0%GPT-6 Sol
Vals Science Index47.9%45.0%Claude Opus 5
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
APEX-Agents65.8%54.3%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 measured7.5%Only GPT-6 Sol measured
Vending-Bench 2$11,182$14,428GPT-6 Sol
LMArena Search1242Not measuredOnly Claude Opus 5 measured
Neither model has a result on the other 11 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index113
Reasoning benchmarks for Claude Opus 5 and GPT-6 Sol
BenchmarkClaude Opus 5GPT-6 SolLeader
GPQA Diamond93.4%Not measuredOnly Claude Opus 5 measured
LiveBench reasoning91.2%88.7%Claude Opus 5
MysteryMechanism (Vals AI)37.4%30.2%Claude Opus 5
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%47.9%Claude Opus 5
GPQA Diamond (Epoch AI run)93.9%94.3%GPT-6 Sol
ARC-AGI97.5%95.5%Claude Opus 5
ARC-AGI-290.4%89.6%Claude Opus 5
SimpleBench80.6%Not measuredOnly Claude Opus 5 measured
Chess puzzles43.0%56.0%GPT-6 Sol
Mystery game puzzles59.0%56.0%Claude Opus 5
EBR-bench45.7%53.3%GPT-6 Sol
LMArena Text: hard prompts15271422Claude Opus 5
LMArena Text: expert15541437Claude Opus 5
LMArena Text: hard prompts in English15231420Claude Opus 5
LMArena Vision: diagrams13481270Claude Opus 5
LMArena Vision: homework13381286Claude Opus 5
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index33
Math benchmarks for Claude Opus 5 and GPT-6 Sol
BenchmarkClaude Opus 5GPT-6 SolLeader
OTIS Mock AIME98.9%100.0%GPT-6 Sol
FrontierMath, tiers 1 to 385.6%89.8%GPT-6 Sol
FrontierMath, tier 473.2%90.0%GPT-6 Sol
ProofBench99.0%83.0%Claude Opus 5
LMArena Text: math15331407Claude Opus 5
LMArena Text: mathematical work15441424Claude 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 Sol
BenchmarkClaude Opus 5GPT-6 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%47.1%Claude Opus 5
SimpleQA Verified59.9%60.7%GPT-6 Sol
LMArena Text: science15311389Claude Opus 5
LMArena Text: medicine and healthcare15251366Claude Opus 5
LMArena Text: legal and government15301396Claude Opus 5
LMArena Text: business and finance15011380Claude 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 index81
Web design benchmarks for Claude Opus 5 and GPT-6 Sol
BenchmarkClaude Opus 5GPT-6 SolLeader
Design Arena: websites13091292Claude Opus 5
Design Arena: UI components13481292Claude Opus 5
Design Arena: game dev13391313Claude Opus 5
Design Arena: data viz13291269Claude Opus 5
Design Arena: 3D13351322Claude Opus 5
Design Arena: all code categories13241301Claude Opus 5
Design Arena: SVG13101318GPT-6 Sol
Design Arena: ASCII art13521226Claude Opus 5
LiveBench design83.0%82.2%Claude Opus 5
GeneralLike-for-likePublic boards, shown as published, kept out of the index272
General benchmarks for Claude Opus 5 and GPT-6 Sol
BenchmarkClaude Opus 5GPT-6 SolLeader
LiveBench data analysis74.6%81.2%GPT-6 Sol
Public Benefits Bench (Vals AI)76.9%56.6%Claude Opus 5
SAGE (Vals AI)49.4%44.8%Claude Opus 5
MedScribe (Vals AI)91.0%82.0%Claude Opus 5
Vals Multimodal Index73.9%Not measuredOnly Claude Opus 5 measured
Long context reasoning (AA-LCR)82.0%83.7%GPT-6 Sol
DTBench97.9%97.3%Claude Opus 5
LMCA64.5%59.1%Claude Opus 5
Furniture assembly60.8%58.3%Claude Opus 5
LMArena Text15091398Claude Opus 5
LMArena Text: instruction following15181413Claude Opus 5
LMArena Text: creative writing14931378Claude Opus 5
LMArena Vision13201240Claude Opus 5
LMArena Text: English15081396Claude Opus 5
LMArena Text: non-English15021388Claude Opus 5
LMArena Text: Chinese15731412Claude Opus 5
LMArena Text: German15271379Claude Opus 5
LMArena Text: Japanese15201377Claude Opus 5
LMArena Text: Korean15171336Claude Opus 5
LMArena Text: French15191399Claude Opus 5
LMArena Text: Spanish15231387Claude Opus 5
LMArena Text: Russian15071402Claude Opus 5
LMArena Text: Polish15221372Claude Opus 5
LMArena Text: multi-turn15001414Claude Opus 5
LMArena Text: longer queries15171416Claude Opus 5
LMArena Text: writing and language14991389Claude Opus 5
LMArena Text: entertainment and media14811373Claude Opus 5
LMArena Vision: English13151229Claude Opus 5
LMArena Vision: Chinese1400Not measuredOnly Claude Opus 5 measured
LMArena Vision: reading text13291258Claude Opus 5
LMArena Vision: humor1293Not measuredOnly Claude Opus 5 measured
LMArena Vision: creative writing13131219Claude Opus 5
LMArena Document1516Not measuredOnly Claude Opus 5 measured
Neither model has a result on the other 13 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 Sol
BenchmarkClaude Opus 5GPT-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

Claude Opus 5$0.018Fits in one request
GPT-6 Sol$0.0070Fits in one request

GPT-6 Sol costs less

Repository review

50K input + 3K output tokens

Claude Opus 5$0.325Fits in one request
GPT-6 Sol$0.130Fits in one request

GPT-6 Sol costs less

Agent loop

200K input + 10K output tokens

Claude Opus 5$1.25Fits in one request
GPT-6 Sol$0.500Fits in one request

GPT-6 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 Sol
SpecificationAnthropic Claude Opus 5OpenAI GPT-6 Sol
MakerAnthropicOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedJuly 24, 2026September 22, 2026
Context window1M1.05M
Input $/Mtok$5.00$2.00
Output $/Mtok$25.00$10.00
Coding index81.882.8
Independent measurements behind it22
Cost per solved task$1.33Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 5 better than GPT-6 Sol for coding?

Claude Opus 5 and GPT-6 Sol are level for coding, 81.8 against 82.8 on the Vibe Coding Index, so price and context decide. Pick Claude Opus 5 when what matters is LMArena WebDev or Terminal-Bench 4 (Vals AI), where it leads. Pick GPT-6 Sol when output tokens cost 2.5x less, or when the context window is larger, 1.05M against 1M tokens.

Which is cheaper, Claude Opus 5 or GPT-6 Sol?

Claude Opus 5 costs $5.00 per million input tokens and $25.00 per million output tokens; GPT-6 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 Sol?

GPT-6 Sol, with 1.05M tokens against 1M.

How many benchmarks is the Claude Opus 5 vs GPT-6 Sol comparison based on?

99 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 Sol's on 2. Where only one model has a result, the page says so instead of naming a winner.

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