Claude Opus 4.1 vs Inkling
Inkling leads Claude Opus 4.1 on the Artificial Analysis Intelligence Index, 25.0 to 22.8, and Inkling costs 18.5x less per output token ($4.05 vs $75.00 per million). Updated October 22, 2026; 58 benchmarks have a result for both.
Claude Opus 4.1 or Inkling: which to pick
Only Inkling has a coding score, 31.5 on the Vibe Coding Index; Claude Opus 4.1 has none, so the two cannot be ranked on coding.
Pick Claude Opus 4.1 for work measured by WeirdML or LMArena Text: coding, where it leads.
- Shared results
- 58
- Claude Opus 4.1 only
- 15
- Inkling only
- 44
- 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.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Only Inkling has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
Inkling
Inkling leads, 25.0 against 22.8.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Inkling has a AA Agentic Index result, 22.5.
Directional only
Reasoning
GPQA Diamond
Inkling
Inkling leads, 87.1% against 76.3%.
Same board, both measured
Math
AIME
No call
Only Claude Opus 4.1 has a AIME result, 78.2%.
Directional only
Knowledge
MMLU Pro
Claude Opus 4.1
Claude Opus 4.1 leads, 87.9% against 86.3%.
Same board, both measured
Web design
Design Arena: websites
Inkling
Inkling leads, 1224 against 1176.
Same board, both measured
General
Vals Index
No call
Only Inkling has a Vals Index result, 29.0%.
Directional only
Long documents
Listed context window
Inkling
Inkling takes 524K tokens against 200K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Inkling
Claude Opus 4.1 $0.052, Inkling $0.0030 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Inkling has the number, $0.76.
Directional only
At a glance
- Coding index
- Claude Opus 4.1 not benchmarked, Inkling 31.5 from 6 benchmarks.
- Widest category
- Math, 11.1 points apart on average over 5 shared benchmarks.
- Widest single gap
- FrontierMath, tiers 1 to 3: Claude Opus 4.1 12.6% against Inkling 33.3%, 20.7 points apart on a 0 to 100 scale.
- Output price
- Claude Opus 4.1 $75.00 against Inkling $4.05 per million output tokens, 18.5x apart.
- Context window
- Claude Opus 4.1 takes 200K 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.
| Category | Claude Opus 4.1 | Bars | Inkling | Ties |
|---|---|---|---|---|
| Coding | 2 | 4 | ||
| Intelligence | 0 | 2 | ||
| Reasoning | 2 | 5 | ||
| Math | 0 | 5 | ||
| Knowledge | 3 | 6 | ||
| Web design | 4 | 4 | ||
| General | 6 | 15 | ||
| All shared boards | 17 | 41 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index24
| Benchmark | Claude Opus 4.1 | Inkling | Leader |
|---|---|---|---|
| LiveBench coding | Not measured | 64.0% | Only Inkling measured |
| LMArena WebDev | 1390 | 1414 | Inkling |
| AA Coding Index | Not measured | 52.1 | Only Inkling measured |
| LiveCodeBench (Vals AI) | 66.5% | 85.5% | Inkling |
| SWE-bench Verified (Vals AI) | Not measured | 77.6% | Only Inkling measured |
| Terminal-Bench 4 (Vals AI) | Not measured | 0.5% | Only Inkling measured |
| Vibe Code Bench (Vals AI) | Not measured | 19.2% | Only Inkling measured |
| Code migration (Vals AI) | Not measured | 11.8% | Only Inkling measured |
| ProgramBench (Vals AI) | Not measured | 0.0% | Only Inkling measured |
| IOI (Vals AI) | Not measured | 14.9% | Only Inkling measured |
| Terminal-Bench 2.1 (Vals AI) | Not measured | 47.6% | Only Inkling measured |
| Vibe Code Bench 1-100 (Vals AI) | Not measured | 7.3% | Only Inkling measured |
| SkillsBench (Vals AI) | Not measured | 26.1% | Only Inkling measured |
| CyberBench (Vals AI) | Not measured | 66.8% | Only Inkling measured |
| SciCode | Not measured | 47.0% | Only Inkling measured |
| Terminal-Bench | 38.0% | Not measured | Only Claude Opus 4.1 measured |
| FrontierCode | Not measured | 14.0% | Only Inkling measured |
| FrontierSWE | Not measured | 4.1% | Only Inkling measured |
| WeirdML | 45.9% | 32.3% | Claude Opus 4.1 |
| Cybench | 42.0% | Not measured | Only Claude Opus 4.1 measured |
| ALE-Bench | Not measured | 946.0 | Only Inkling measured |
| LMArena Text: coding | 1479 | 1466 | Claude Opus 4.1 |
| LMArena Text: software and IT | 1456 | 1465 | Inkling |
| LMArena WebDev: React | Not measured | 1404 | Only Inkling measured |
| LMArena WebDev: HTML | 1399 | 1399 | Inkling |
| SciCode | 4.6% | Not measured | Only Claude Opus 4.1 measured |
| Neither model has a result on the other 13 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | Claude Opus 4.1 | Inkling | Leader |
|---|---|---|---|
| AA Intelligence Index | 22.8 | 25.0 | Inkling |
| Epoch Capabilities Index | 144.1 | 148.4 | Inkling |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index15 boards, none shared
| Benchmark | Claude Opus 4.1 | Inkling | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 22.5 | Only Inkling measured |
| Design Arena: agents building web apps | Not measured | 1196 | Only Inkling measured |
| LiveBench research | Not measured | 59.9% | Only Inkling measured |
| LiveBench browser | Not measured | 16.0% | Only Inkling measured |
| LiveBench long agentic | Not measured | 14.1% | Only Inkling measured |
| SREBench (Vals AI) | Not measured | 0.0% | Only Inkling measured |
| Finance Agent (Vals AI) | Not measured | 46.6% | Only Inkling measured |
| Tax Agent Bench (Vals AI) | Not measured | 15.3% | Only Inkling measured |
| Legal Research Bench (Vals AI) | Not measured | 28.4% | Only Inkling measured |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 3.8% | Only Inkling measured |
| Excel Modeling Benchmark (Vals AI) | Not measured | 38.4% | Only Inkling measured |
| APEX-Agents | Not measured | 33.8% | Only Inkling measured |
| METR time horizons | 66.8% | Not measured | Only Claude Opus 4.1 measured |
| GDPval | 43.6% | Not measured | Only Claude Opus 4.1 measured |
| DeepResearch Bench | 48.3% | Not measured | Only Claude Opus 4.1 measured |
| Neither model has a result on the other 26 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index25
| Benchmark | Claude Opus 4.1 | Inkling | Leader |
|---|---|---|---|
| GPQA Diamond | 76.3% | 87.1% | Inkling |
| LiveBench reasoning | Not measured | 78.3% | Only Inkling measured |
| MMMU Pro (Vals AI) | 77.5% | 78.5% | Inkling |
| GPQA Diamond (Artificial Analysis run) | Not measured | 87.2% | Only Inkling measured |
| Humanity's Last Exam (Artificial Analysis run) | Not measured | 31.9% | Only Inkling measured |
| GPQA Diamond (Epoch AI run) | 77.3% | 88.3% | Inkling |
| ARC-AGI | Not measured | 79.5% | Only Inkling measured |
| ARC-AGI-2 | Not measured | 36.5% | Only Inkling measured |
| SimpleBench | 60.0% | 50.0% | Claude Opus 4.1 |
| Chess puzzles | Not measured | 21.0% | Only Inkling measured |
| Mystery game puzzles | 21.0% | Not measured | Only Claude Opus 4.1 measured |
| EBR-bench | 7.9% | Not measured | Only Claude Opus 4.1 measured |
| VPCT | 35.0% | Not measured | Only Claude Opus 4.1 measured |
| LMArena Text: hard prompts | 1442 | 1451 | Inkling |
| LMArena Text: expert | 1438 | 1466 | Inkling |
| LMArena Text: hard prompts in English | 1451 | 1448 | Claude Opus 4.1 |
| Neither model has a result on the other 6 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index05
| Benchmark | Claude Opus 4.1 | Inkling | Leader |
|---|---|---|---|
| AIME | 78.2% | Not measured | Only Claude Opus 4.1 measured |
| MATH 500 (Vals AI) | 95.4% | Not measured | Only Claude Opus 4.1 measured |
| MGSM (Vals AI) | 94.4% | Not measured | Only Claude Opus 4.1 measured |
| OTIS Mock AIME | 68.9% | 88.9% | Inkling |
| FrontierMath, tiers 1 to 3 | 12.6% | 33.3% | Inkling |
| FrontierMath, tier 4 | 2.4% | 4.9% | Inkling |
| ProofBench | Not measured | 0.0% | Only Inkling measured |
| LMArena Text: math | 1431 | 1479 | Inkling |
| LMArena Text: mathematical work | 1434 | 1460 | Inkling |
| Neither model has a result on the other 4 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index36
| Benchmark | Claude Opus 4.1 | Inkling | Leader |
|---|---|---|---|
| MMLU Pro | 87.9% | 86.3% | Claude Opus 4.1 |
| LegalBench (Vals AI) | 83.5% | 83.0% | Claude Opus 4.1 |
| CorpFin (Vals AI) | Not measured | 68.6% | Only Inkling measured |
| TaxEval (Vals AI) | 73.7% | 75.3% | Inkling |
| MortgageTax (Vals AI) | 61.1% | 64.0% | Inkling |
| MedQA (Vals AI) | 93.6% | Not measured | Only Claude Opus 4.1 measured |
| MedCode (Vals AI) | 47.2% | 41.2% | Claude Opus 4.1 |
| SimpleQA Verified | Not measured | 40.3% | Only Inkling measured |
| LMArena Text: science | 1422 | 1455 | Inkling |
| LMArena Text: medicine and healthcare | 1416 | 1447 | Inkling |
| LMArena Text: legal and government | 1421 | 1448 | Inkling |
| LMArena Text: business and finance | 1406 | 1438 | Inkling |
| FACTS Benchmark Suite | 40.4% | Not measured | Only Claude Opus 4.1 measured |
| Neither model has a result on the other 5 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index44
| Benchmark | Claude Opus 4.1 | Inkling | Leader |
|---|---|---|---|
| Design Arena: websites | 1176 | 1224 | Inkling |
| Design Arena: UI components | 1162 | 1198 | Inkling |
| Design Arena: game dev | 1171 | 1165 | Claude Opus 4.1 |
| Design Arena: data viz | 1166 | 1156 | Claude Opus 4.1 |
| Design Arena: 3D | 1152 | 1160 | Inkling |
| Design Arena: all code categories | 1170 | 1205 | Inkling |
| Design Arena: SVG | 1152 | 1108 | Claude Opus 4.1 |
| Design Arena: ASCII art | 1167 | 1089 | Claude Opus 4.1 |
| LiveBench design | Not measured | 58.3% | Only Inkling measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index615
| Benchmark | Claude Opus 4.1 | Inkling | Leader |
|---|---|---|---|
| Vals Index | Not measured | 29.0% | Only Inkling measured |
| LiveBench data analysis | Not measured | 72.8% | Only Inkling measured |
| Public Benefits Bench (Vals AI) | Not measured | 58.5% | Only Inkling measured |
| SAGE (Vals AI) | 31.4% | 36.5% | Inkling |
| MedScribe (Vals AI) | 73.9% | 85.4% | Inkling |
| Vals Multimodal Index | Not measured | 49.4% | Only Inkling measured |
| Long context reasoning (AA-LCR) | Not measured | 77.3% | Only Inkling measured |
| DTBench | 80.0% | 87.5% | Inkling |
| LMCA | 37.1% | 37.6% | Inkling |
| Creative writing (Lech Mazur) | 84.7% | Not measured | Only Claude Opus 4.1 measured |
| LMArena Text | 1419 | 1442 | Inkling |
| LMArena Text: instruction following | 1435 | 1425 | Claude Opus 4.1 |
| LMArena Text: creative writing | 1412 | 1390 | Claude Opus 4.1 |
| LMArena Text: English | 1433 | 1442 | Inkling |
| LMArena Text: non-English | 1405 | 1434 | Inkling |
| LMArena Text: Chinese | 1427 | 1493 | Inkling |
| LMArena Text: German | 1413 | 1445 | Inkling |
| LMArena Text: Japanese | 1377 | 1429 | Inkling |
| LMArena Text: Korean | 1381 | 1403 | Inkling |
| LMArena Text: French | 1433 | 1455 | Inkling |
| LMArena Text: Spanish | 1448 | 1449 | Inkling |
| LMArena Text: Russian | 1422 | 1430 | Inkling |
| LMArena Text: Polish | 1413 | 1450 | Inkling |
| LMArena Text: multi-turn | 1444 | 1437 | Claude Opus 4.1 |
| LMArena Text: longer queries | 1455 | 1435 | Claude Opus 4.1 |
| LMArena Text: writing and language | 1418 | 1404 | Claude Opus 4.1 |
| LMArena Text: entertainment and media | 1398 | 1394 | Claude Opus 4.1 |
| Neither model has a result on the other 19 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Opus 4.1 | Inkling | 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
Inkling costs less
Repository review
50K input + 3K output tokens
Inkling costs less
Agent loop
200K input + 10K output tokens
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.
| Specification | Anthropic Claude Opus 4.1 | Thinking Machines Inkling |
|---|---|---|
| Maker | Anthropic | Thinking Machines |
| Weights | No public weights listed | Open weights |
| Released | August 5, 2025 | July 17, 2026 |
| Context window | 200K | 524K |
| Input $/Mtok | $15.00 | $0.975 |
| Output $/Mtok | $75.00 | $4.05 |
| Coding index | Not benchmarked | 31.5 |
| Independent measurements behind it | 1 | 6 |
| Cost per solved task | Not computable | $0.76 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Opus 4.1 better than Inkling for coding?
Only Inkling has a coding score, 31.5 on the Vibe Coding Index; Claude Opus 4.1 has none, so the two cannot be ranked on coding. Pick Claude Opus 4.1 for work measured by WeirdML or LMArena Text: coding, where it leads.
Which is cheaper, Claude Opus 4.1 or Inkling?
Claude Opus 4.1 costs $15.00 per million input tokens and $75.00 per million output tokens; Inkling costs $0.975 and $4.05. Cost per solved task is known for Inkling only.
Which has the bigger context window, Claude Opus 4.1 or Inkling?
Inkling, with 524K tokens against 200K.
How many benchmarks is the Claude Opus 4.1 vs Inkling comparison based on?
58 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.1's coding index rests on 1 independent benchmark and Inkling's on 6. Where only one model has a result, the page says so instead of naming a winner.