Claude Opus 5.5 vs Muse Wonder
Claude Opus 5.5 leads Muse Wonder on coding, 88.8 to 71.9 on the Vibe Coding Index, at about the same output price ($20.00 vs $20.00 per million). Updated October 22, 2026; 60 benchmarks have a result for both.
Claude Opus 5.5 or Muse Wonder: which to pick
Pick Claude Opus 5.5 for coding: it scores 88.8 on the Vibe Coding Index against 71.9 for Muse Wonder.
Pick Muse Wonder for a larger context window (1.05M against 1M tokens) and work measured by CyberBench (Vals AI) or Harvey's Legal Agent Benchmark (Vals AI), where it leads.
- Shared results
- 60
- Claude Opus 5.5 only
- 49
- Muse Wonder only
- 0
- 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 5.5
Claude Opus 5.5 scores 88.8 against 71.9.
5 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
No call
Only Claude Opus 5.5 has a AA Intelligence Index result, 57.6.
Directional only
Web design
Design Arena: websites
Muse Wonder
Muse Wonder leads, 1362 against 1335.
Same board, both measured
General
Vals Index
Claude Opus 5.5
Claude Opus 5.5 leads, 70.2% against 64.9%.
Same board, both measured
Long documents
Listed context window
Muse Wonder
Muse Wonder takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
No call
Claude Opus 5.5 $0.014, Muse Wonder $0.014 per turn.
List prices
At a glance
- Coding index
- Claude Opus 5.5 88.8 from 5 benchmarks, Muse Wonder 71.9 from 3 benchmarks.
- Widest category
- Agentic work, 10.4 points apart on average over 11 shared benchmarks.
- Widest single gap
- IOI (Vals AI): Claude Opus 5.5 95.1% against Muse Wonder 66.9%, 28.1 points apart on a 0 to 100 scale.
- Output price
- Both cost $20.00 per million output tokens.
- Context window
- Claude Opus 5.5 takes 1M tokens, Muse Wonder 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.
| Category | Claude Opus 5.5 | Bars | Muse Wonder | Ties |
|---|---|---|---|---|
| Coding | 12 | 1 | ||
| Intelligence | 1 | 0 | ||
| Agentic work | 8 | 2 | 1 tie | |
| Reasoning | 5 | 0 | ||
| Math | 3 | 0 | ||
| Knowledge | 3 | 1 | ||
| Web design | 5 | 1 | ||
| General | 14 | 3 | ||
| All shared boards | 51 | 8 | 1 tie |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index121
| Benchmark | Claude Opus 5.5 | Muse Wonder | Leader |
|---|---|---|---|
| LiveBench coding | 96.3% | Not measured | Only Claude Opus 5.5 measured |
| LMArena WebDev | 1807 | 1652 | Claude Opus 5.5 |
| Terminal-Bench 4 (Vals AI) | 65.2% | 49.5% | Claude Opus 5.5 |
| Vibe Code Bench (Vals AI) | 90.3% | 83.1% | Claude Opus 5.5 |
| Code migration (Vals AI) | 66.7% | 62.5% | Claude Opus 5.5 |
| ProgramBench (Vals AI) | 18.5% | Not measured | Only Claude Opus 5.5 measured |
| IOI (Vals AI) | 95.1% | 66.9% | Claude Opus 5.5 |
| Terminal-Bench 2.1 (Vals AI) | 87.6% | Not measured | Only Claude Opus 5.5 measured |
| SWE-bench Multimodal (Vals AI) | 70.2% | 45.6% | Claude Opus 5.5 |
| Vibe Code Bench 1-100 (Vals AI) | 30.4% | 26.6% | Claude Opus 5.5 |
| CyberBench (Vals AI) | 74.6% | 80.4% | Muse Wonder |
| SciCode | 66.9% | 60.3% | Claude Opus 5.5 |
| FrontierCode | 54.6% | Not measured | Only Claude Opus 5.5 measured |
| FrontierSWE | 62.3% | Not measured | Only Claude Opus 5.5 measured |
| MirrorCode | 77.4% | Not measured | Only Claude Opus 5.5 measured |
| ALE-Bench | 2147.4 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: coding | 1545 | 1522 | Claude Opus 5.5 |
| LMArena Text: software and IT | 1538 | 1515 | Claude Opus 5.5 |
| LMArena WebDev: React | 1855 | 1641 | Claude Opus 5.5 |
| LMArena WebDev: HTML | 1753 | 1694 | Claude Opus 5.5 |
| LMArena WebDev: from an image | 1753 | Not measured | Only Claude Opus 5.5 measured |
| SciCode | 18.5% | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 17 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Claude Opus 5.5 | Muse Wonder | Leader |
|---|---|---|---|
| AA Intelligence Index | 57.6 | Not measured | Only Claude Opus 5.5 measured |
| Epoch Capabilities Index | 168.8 | 161.8 | Claude Opus 5.5 |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index82
| Benchmark | Claude Opus 5.5 | Muse Wonder | Leader |
|---|---|---|---|
| Design Arena: agents building web apps | 1316 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: agents building mobile apps | 1308 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: spreadsheets | 1368 | 1243 | Claude Opus 5.5 |
| LiveBench research | 85.0% | Not measured | Only Claude Opus 5.5 measured |
| LiveBench browser | 80.0% | Not measured | Only Claude Opus 5.5 measured |
| LiveBench long agentic | 85.0% | Not measured | Only Claude Opus 5.5 measured |
| SREBench (Vals AI) | 33.6% | Not measured | Only Claude Opus 5.5 measured |
| Finance Agent (Vals AI) | 58.6% | 56.6% | Claude Opus 5.5 |
| Tax Agent Bench (Vals AI) | 45.6% | 36.3% | Claude Opus 5.5 |
| Legal Research Bench (Vals AI) | 50.5% | 50.5% | Tie |
| Harvey's Legal Agent Benchmark (Vals AI) | 9.2% | 23.8% | Muse Wonder |
| Excel Modeling Benchmark (Vals AI) | 75.9% | 67.1% | Claude Opus 5.5 |
| BioMysteryBench (Vals AI) | 79.3% | 67.0% | Claude Opus 5.5 |
| Terminal-Bench-Science (Vals AI) | 47.1% | 22.9% | Claude Opus 5.5 |
| Vals Science Index | 58.7% | 39.1% | Claude Opus 5.5 |
| Time Horizon Index (Vals AI) | 91.3% | Not measured | Only Claude Opus 5.5 measured |
| CUA-bench (Vals AI) | 14.0% | 7.2% | Claude Opus 5.5 |
| Robo-bench (Vals AI) | 14.6% | Not measured | Only Claude Opus 5.5 measured |
| APEX-Agents | 73.5% | Not measured | Only Claude Opus 5.5 measured |
| Remote Labor Index | 21.3% | Not measured | Only Claude Opus 5.5 measured |
| SpireClimb | 3.3% | Not measured | Only Claude Opus 5.5 measured |
| Vending-Bench 2 | $9,235 | $9,432 | Muse Wonder |
| LMArena Search | 1213 | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 18 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
| Benchmark | Claude Opus 5.5 | Muse Wonder | Leader |
|---|---|---|---|
| LiveBench reasoning | 92.2% | Not measured | Only Claude Opus 5.5 measured |
| MysteryMechanism (Vals AI) | 49.5% | 27.5% | Claude Opus 5.5 |
| Humanity's Last Exam (Artificial Analysis run) | 61.4% | 50.1% | Claude Opus 5.5 |
| GPQA Diamond (Epoch AI run) | 90.6% | Not measured | Only Claude Opus 5.5 measured |
| ARC-AGI | 98.5% | Not measured | Only Claude Opus 5.5 measured |
| ARC-AGI-2 | 93.3% | Not measured | Only Claude Opus 5.5 measured |
| Chess puzzles | 67.0% | Not measured | Only Claude Opus 5.5 measured |
| Mystery game puzzles | 71.0% | Not measured | Only Claude Opus 5.5 measured |
| EBR-bench | 71.4% | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: hard prompts | 1536 | 1506 | Claude Opus 5.5 |
| LMArena Text: expert | 1549 | 1513 | Claude Opus 5.5 |
| LMArena Text: hard prompts in English | 1535 | 1506 | Claude Opus 5.5 |
| LMArena Vision: diagrams | 1345 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Vision: homework | 1362 | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 8 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index30
| Benchmark | Claude Opus 5.5 | Muse Wonder | Leader |
|---|---|---|---|
| OTIS Mock AIME | 100.0% | Not measured | Only Claude Opus 5.5 measured |
| FrontierMath, tiers 1 to 3 | 91.2% | Not measured | Only Claude Opus 5.5 measured |
| FrontierMath, tier 4 | 95.0% | Not measured | Only Claude Opus 5.5 measured |
| ProofBench | 100.0% | 84.0% | Claude Opus 5.5 |
| LMArena Text: math | 1518 | 1486 | Claude Opus 5.5 |
| LMArena Text: mathematical work | 1516 | 1514 | Claude Opus 5.5 |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index31
| Benchmark | Claude Opus 5.5 | Muse Wonder | Leader |
|---|---|---|---|
| MedCode (Vals AI) | 49.8% | Not measured | Only Claude Opus 5.5 measured |
| SimpleQA Verified | 72.2% | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: science | 1524 | 1506 | Claude Opus 5.5 |
| LMArena Text: medicine and healthcare | 1509 | 1512 | Muse Wonder |
| LMArena Text: legal and government | 1518 | 1505 | Claude Opus 5.5 |
| LMArena Text: business and finance | 1494 | 1483 | Claude Opus 5.5 |
| FACTS Benchmark Suite | 65.3% | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 11 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index51
| Benchmark | Claude Opus 5.5 | Muse Wonder | Leader |
|---|---|---|---|
| Design Arena: websites | 1335 | 1362 | Muse Wonder |
| Design Arena: UI components | 1385 | 1379 | Claude Opus 5.5 |
| Design Arena: game dev | 1461 | 1376 | Claude Opus 5.5 |
| Design Arena: data viz | 1397 | 1317 | Claude Opus 5.5 |
| Design Arena: 3D | 1476 | 1427 | Claude Opus 5.5 |
| Design Arena: all code categories | 1390 | 1371 | Claude Opus 5.5 |
| Design Arena: SVG | 1329 | Not measured | Only Claude Opus 5.5 measured |
| LiveBench design | 86.9% | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 1 board here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index143
| Benchmark | Claude Opus 5.5 | Muse Wonder | Leader |
|---|---|---|---|
| Vals Index | 70.2% | 64.9% | Claude Opus 5.5 |
| LiveBench data analysis | 80.3% | Not measured | Only Claude Opus 5.5 measured |
| Public Benefits Bench (Vals AI) | 70.6% | 70.2% | Claude Opus 5.5 |
| SAGE (Vals AI) | 45.8% | Not measured | Only Claude Opus 5.5 measured |
| MedScribe (Vals AI) | 91.4% | Not measured | Only Claude Opus 5.5 measured |
| Long context reasoning (AA-LCR) | 84.7% | 80.7% | Claude Opus 5.5 |
| DTBench | 98.9% | 95.2% | Claude Opus 5.5 |
| LMCA | 68.2% | 56.8% | Claude Opus 5.5 |
| Furniture assembly | 83.3% | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text | 1516 | 1502 | Claude Opus 5.5 |
| LMArena Text: instruction following | 1537 | 1491 | Claude Opus 5.5 |
| LMArena Text: creative writing | 1535 | 1491 | Claude Opus 5.5 |
| LMArena Vision | 1321 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: English | 1519 | 1507 | Claude Opus 5.5 |
| LMArena Text: non-English | 1507 | 1492 | Claude Opus 5.5 |
| LMArena Text: Chinese | 1582 | 1537 | Claude Opus 5.5 |
| LMArena Text: Japanese | 1534 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: French | 1493 | 1523 | Muse Wonder |
| LMArena Text: Spanish | 1508 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: Russian | 1517 | 1522 | Muse Wonder |
| LMArena Text: multi-turn | 1501 | 1510 | Muse Wonder |
| LMArena Text: longer queries | 1532 | 1493 | Claude Opus 5.5 |
| LMArena Text: writing and language | 1532 | 1496 | Claude Opus 5.5 |
| LMArena Text: entertainment and media | 1515 | 1482 | Claude Opus 5.5 |
| LMArena Vision: English | 1317 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Vision: reading text | 1326 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Vision: creative writing | 1320 | Not measured | Only Claude Opus 5.5 measured |
| 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 5.5 | Muse Wonder | 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
Same cost
Repository review
50K input + 3K output tokens
Same cost
Agent loop
200K input + 10K output tokens
Same cost
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 5.5 | Meta Muse Wonder |
|---|---|---|
| Maker | Anthropic | Meta |
| Weights | No public weights listed | No public weights listed |
| Released | September 22, 2026 | October 12, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $4.00 | $4.00 |
| Output $/Mtok | $20.00 | $20.00 |
| Coding index | 88.8 | 71.9 |
| Independent measurements behind it | 5 | 3 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Opus 5.5 better than Muse Wonder for coding?
Pick Claude Opus 5.5 for coding: it scores 88.8 on the Vibe Coding Index against 71.9 for Muse Wonder. Pick Muse Wonder for a larger context window (1.05M against 1M tokens) and work measured by CyberBench (Vals AI) or Harvey's Legal Agent Benchmark (Vals AI), where it leads.
Which is cheaper, Claude Opus 5.5 or Muse Wonder?
Claude Opus 5.5 costs $4.00 per million input tokens and $20.00 per million output tokens; Muse Wonder costs $4.00 and $20.00. Cost per solved task is known for neither of them.
Which has the bigger context window, Claude Opus 5.5 or Muse Wonder?
Muse Wonder, with 1.05M tokens against 1M.
How many benchmarks is the Claude Opus 5.5 vs Muse Wonder comparison based on?
60 benchmarks have a result for both models as of October 22, 2026. Claude Opus 5.5's coding index rests on 5 independent benchmarks and Muse Wonder's on 3. Where only one model has a result, the page says so instead of naming a winner.