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Claude Opus 5 vs Inkling

Claude Opus 5 leads Inkling on coding, 83.0 to 31.5 on the Vibe Coding Index, and Inkling costs 6.2x less per output token ($4.05 vs $25.00 per million). Updated October 22, 2026; 100 benchmarks have a result for both.

Replace Claude Opus 5 Replace Inkling
Claude Opus 5Anthropic
Coding
83.0
Overall
81.6
Output $/M
$25.00
98
T InklingThinking Machines
Coding
31.5
Overall
46.5
Output $/M
$4.05
2
vs boards won of 100 shared

Claude Opus 5 or Inkling: which to pick

Pick Claude Opus 5 for coding: it scores 83.0 on the Vibe Coding Index against 31.5 for Inkling.

Pick Inkling for output tokens 6.2x cheaper ($4.05 vs $25.00 per million) and a lower cost per solved task ($0.76 against $1.33).

Model AClaude Opus 5Anthropic83.0/1006 independent benchmarks$1.33 per solved taskModel BInklingThinking Machines31.5/1006 independent benchmarks$0.76 per solved task
Shared results
100
Claude Opus 5 only
31
Inkling only
2
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.

At a glance

Coding index
Claude Opus 5 83.0 from 6 benchmarks, Inkling 31.5 from 6 benchmarks.
Widest category
Math, 42.1 points apart on average over 6 shared benchmarks.
Widest single gap
ProofBench: Claude Opus 5 99.0% against Inkling 0.0%, 99.0 points apart on a 0 to 100 scale.
Output price
Claude Opus 5 $25.00 against Inkling $4.05 per million output tokens, 6.2x apart.
Context window
Claude Opus 5 takes 1M tokens, Inkling 524K.

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 5BarsInklingTies
Coding221
Intelligence20
Agentic work110
Reasoning130
Math60
Knowledge101
Web design90
General250
All shared boards982
CodingLike-for-likeSix of these boards feed the Vibe Coding Index221
Coding benchmarks for Claude Opus 5 and Inkling
BenchmarkClaude Opus 5InklingLeader
LiveBench coding90.8%64.0%Claude Opus 5
LMArena WebDev16891414Claude Opus 5
AA Coding Index78.052.1Claude Opus 5
LiveCodeBench (Vals AI)89.0%85.5%Claude Opus 5
SWE-bench Verified (Vals AI)97.0%77.6%Claude Opus 5
Terminal-Bench 4 (Vals AI)53.5%0.5%Claude Opus 5
Vibe Code Bench (Vals AI)88.4%19.2%Claude Opus 5
Code migration (Vals AI)57.5%11.8%Claude Opus 5
ProgramBench (Vals AI)3.0%0.0%Claude Opus 5
IOI (Vals AI)84.3%14.9%Claude Opus 5
Terminal-Bench 2.1 (Vals AI)84.6%47.6%Claude Opus 5
Vibe Code Bench 1-100 (Vals AI)28.5%7.3%Claude Opus 5
SkillsBench (Vals AI)60.4%26.1%Claude Opus 5
CyberBench (Vals AI)65.4%66.8%Inkling
SciCode56.4%47.0%Claude Opus 5
FrontierCode53.4%14.0%Claude Opus 5
FrontierSWE52.0%4.1%Claude Opus 5
WeirdML91.8%32.3%Claude Opus 5
ALE-Bench2164.6946.0Claude Opus 5
LMArena Text: coding15331466Claude Opus 5
LMArena Text: software and IT15271465Claude Opus 5
LMArena WebDev: React17111404Claude Opus 5
LMArena WebDev: HTML16801399Claude Opus 5
LMArena WebDev: from an image1662Not measuredOnly Claude Opus 5 measured
SciCode13.8%Not measuredOnly Claude Opus 5 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 5 and Inkling
BenchmarkClaude Opus 5InklingLeader
AA Intelligence Index50.825.0Claude Opus 5
Epoch Capabilities Index163.9148.4Claude Opus 5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index110
Agentic work benchmarks for Claude Opus 5 and Inkling
BenchmarkClaude Opus 5InklingLeader
AA Agentic Index56.522.5Claude Opus 5
Design Arena: agents building web apps12661196Claude Opus 5
Design Arena: agents building full-stack apps1306Not measuredOnly Claude Opus 5 measured
Design Arena: agents building mobile apps1348Not measuredOnly Claude Opus 5 measured
Design Arena: agents building Android apps1257Not measuredOnly Claude Opus 5 measured
Design Arena: agents building Godot games1279Not measuredOnly Claude Opus 5 measured
Design Arena: agents building games1260Not measuredOnly Claude Opus 5 measured
Design Arena: PowerPoint slides1242Not measuredOnly Claude Opus 5 measured
LiveBench research88.9%59.9%Claude Opus 5
LiveBench browser84.0%16.0%Claude Opus 5
LiveBench long agentic62.1%14.1%Claude Opus 5
SREBench (Vals AI)12.2%0.0%Claude Opus 5
Finance Agent (Vals AI)58.6%46.6%Claude Opus 5
Tax Agent Bench (Vals AI)45.5%15.3%Claude Opus 5
Legal Research Bench (Vals AI)55.3%28.4%Claude Opus 5
Harvey's Legal Agent Benchmark (Vals AI)Not measured3.8%Only Inkling measured
Excel Modeling Benchmark (Vals AI)73.6%38.4%Claude Opus 5
BioMysteryBench (Vals AI)79.3%Not measuredOnly Claude Opus 5 measured
Terminal-Bench-Science (Vals AI)27.1%Not measuredOnly Claude Opus 5 measured
Vals Science Index47.9%Not measuredOnly Claude Opus 5 measured
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%33.8%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
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 13 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index130
Reasoning benchmarks for Claude Opus 5 and Inkling
BenchmarkClaude Opus 5InklingLeader
GPQA Diamond93.4%87.1%Claude Opus 5
LiveBench reasoning91.2%78.3%Claude Opus 5
MysteryMechanism (Vals AI)37.4%Not measuredOnly Claude Opus 5 measured
MMMU Pro (Vals AI)89.9%78.5%Claude Opus 5
GPQA Diamond (Artificial Analysis run)93.7%87.2%Claude Opus 5
Humanity's Last Exam (Artificial Analysis run)54.9%31.9%Claude Opus 5
GPQA Diamond (Epoch AI run)93.9%88.3%Claude Opus 5
ARC-AGI97.5%79.5%Claude Opus 5
ARC-AGI-290.4%36.5%Claude Opus 5
SimpleBench80.6%50.0%Claude Opus 5
Chess puzzles43.0%21.0%Claude Opus 5
Mystery game puzzles59.0%Not measuredOnly Claude Opus 5 measured
EBR-bench45.7%Not measuredOnly Claude Opus 5 measured
LMArena Text: hard prompts15271451Claude Opus 5
LMArena Text: expert15541466Claude Opus 5
LMArena Text: hard prompts in English15231448Claude Opus 5
LMArena Vision: diagrams1348Not measuredOnly Claude Opus 5 measured
LMArena Vision: homework1338Not measuredOnly Claude Opus 5 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 5 and Inkling
BenchmarkClaude Opus 5InklingLeader
OTIS Mock AIME98.9%88.9%Claude Opus 5
FrontierMath, tiers 1 to 385.6%33.3%Claude Opus 5
FrontierMath, tier 473.2%4.9%Claude Opus 5
ProofBench99.0%0.0%Claude Opus 5
LMArena Text: math15331479Claude Opus 5
LMArena Text: mathematical work15441460Claude Opus 5
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 5 and Inkling
BenchmarkClaude Opus 5InklingLeader
MMLU Pro91.6%86.3%Claude Opus 5
LegalBench (Vals AI)87.0%83.0%Claude Opus 5
CorpFin (Vals AI)73.2%68.6%Claude Opus 5
TaxEval (Vals AI)75.1%75.3%Inkling
MortgageTax (Vals AI)72.1%64.0%Claude Opus 5
MedCode (Vals AI)63.6%41.2%Claude Opus 5
SimpleQA Verified59.9%40.3%Claude Opus 5
LMArena Text: science15311455Claude Opus 5
LMArena Text: medicine and healthcare15251447Claude Opus 5
LMArena Text: legal and government15301448Claude Opus 5
LMArena Text: business and finance15011438Claude Opus 5
Neither model has a result on the other 7 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index90
Web design benchmarks for Claude Opus 5 and Inkling
BenchmarkClaude Opus 5InklingLeader
Design Arena: websites13091224Claude Opus 5
Design Arena: UI components13461199Claude Opus 5
Design Arena: game dev13381165Claude Opus 5
Design Arena: data viz13301157Claude Opus 5
Design Arena: 3D13341160Claude Opus 5
Design Arena: all code categories13231205Claude Opus 5
Design Arena: SVG13091107Claude Opus 5
Design Arena: ASCII art13521089Claude Opus 5
LiveBench design83.0%58.3%Claude Opus 5
GeneralLike-for-likePublic boards, shown as published, kept out of the index250
General benchmarks for Claude Opus 5 and Inkling
BenchmarkClaude Opus 5InklingLeader
Vals IndexNot measured29.0%Only Inkling measured
LiveBench data analysis74.6%72.8%Claude Opus 5
Public Benefits Bench (Vals AI)76.9%58.5%Claude Opus 5
SAGE (Vals AI)49.4%36.5%Claude Opus 5
MedScribe (Vals AI)91.0%85.4%Claude Opus 5
Vals Multimodal Index73.9%49.4%Claude Opus 5
Long context reasoning (AA-LCR)82.0%77.3%Claude Opus 5
DTBench97.9%87.5%Claude Opus 5
LMCA64.5%37.6%Claude Opus 5
Furniture assembly60.8%Not measuredOnly Claude Opus 5 measured
LMArena Text15091442Claude Opus 5
LMArena Text: instruction following15181425Claude Opus 5
LMArena Text: creative writing14931390Claude Opus 5
LMArena Vision1320Not measuredOnly Claude Opus 5 measured
LMArena Text: English15081442Claude Opus 5
LMArena Text: non-English15021434Claude Opus 5
LMArena Text: Chinese15731493Claude Opus 5
LMArena Text: German15271445Claude Opus 5
LMArena Text: Japanese15201429Claude Opus 5
LMArena Text: Korean15171403Claude Opus 5
LMArena Text: French15191455Claude Opus 5
LMArena Text: Spanish15231449Claude Opus 5
LMArena Text: Russian15071430Claude Opus 5
LMArena Text: Polish15221450Claude Opus 5
LMArena Text: multi-turn15001437Claude Opus 5
LMArena Text: longer queries15171435Claude Opus 5
LMArena Text: writing and language14991404Claude Opus 5
LMArena Text: entertainment and media14811394Claude Opus 5
LMArena Vision: English1315Not measuredOnly Claude Opus 5 measured
LMArena Vision: Chinese1400Not measuredOnly Claude Opus 5 measured
LMArena Vision: reading text1329Not measuredOnly Claude Opus 5 measured
LMArena Vision: humor1293Not measuredOnly Claude Opus 5 measured
LMArena Vision: creative writing1313Not measuredOnly Claude Opus 5 measured
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 Inkling
BenchmarkClaude Opus 5InklingLeader
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
Inkling$0.0030Fits in one request

Inkling costs less

Repository review

50K input + 3K output tokens

Claude Opus 5$0.325Fits in one request
Inkling$0.062Fits in one request

Inkling costs less

Agent loop

200K input + 10K output tokens

Claude Opus 5$1.25Fits in one request
Inkling$0.240Fits in one request

Inkling 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 Inkling
SpecificationAnthropic Claude Opus 5Thinking Machines Inkling
MakerAnthropicThinking Machines
WeightsNo public weights listedOpen weights
ReleasedJuly 24, 2026July 17, 2026
Context window1M524K
Input $/Mtok$5.00$1.00
Output $/Mtok$25.00$4.05
Coding index83.031.5
Independent measurements behind it66
Cost per solved task$1.33$0.76
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 5 better than Inkling for coding?

Pick Claude Opus 5 for coding: it scores 83.0 on the Vibe Coding Index against 31.5 for Inkling. Pick Inkling for output tokens 6.2x cheaper ($4.05 vs $25.00 per million) and a lower cost per solved task ($0.76 against $1.33).

Which is cheaper, Claude Opus 5 or Inkling?

Claude Opus 5 costs $5.00 per million input tokens and $25.00 per million output tokens; Inkling costs $1.00 and $4.05. Per solved SWE-bench Verified task, Claude Opus 5 costs $1.33 and Inkling $0.76.

Which has the bigger context window, Claude Opus 5 or Inkling?

Claude Opus 5, with 1M tokens against 524K.

How many benchmarks is the Claude Opus 5 vs Inkling comparison based on?

100 benchmarks have a result for both models as of October 22, 2026. Claude Opus 5's coding index rests on 6 independent benchmarks and Inkling's on 6. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/claude-opus-5-vs-thinkingmachines-inkling">LLMBenchmark.ai, Claude Opus 5 vs Inkling</a></p>