Claude Opus 5.5 vs Muse Wonder
| Spec | Claude Opus 5.5 | Muse Wonder |
|---|---|---|
| Respan Index | 74.1 (#1) | 61.4 (#14) |
| Blended price per 1M | $4 | $8 |
| Context window | 1M | 1.0M |
| Input / output per 1M | $2 / $10 | $4 / $20 |
| Max output | 128K | - |
| Input | text, vision | text, vision, video, audio |
| Released | 2026-09-22 | 2026-10-12 |
Respan Index by category
Each category is scored 0 to 100, and how far ahead the winner is. Leads under a point are close to even.
| Category | Claude Opus 5.5 | Muse Wonder |
|---|---|---|
| Coding | 68.3 Claude Opus 5.5 | 48.7 Muse Wonder |
| Agents | 79.1 Claude Opus 5.5 | 66.7 Muse Wonder |
| Reasoning | 83.9 Claude Opus 5.5 | 72.7 Muse Wonder |
| Knowledge & language | 70.4 Claude Opus 5.5 | 57.9 Muse Wonder |
| Human preference | 61.4 Claude Opus 5.5 | 57.5 Muse Wonder |
Benchmarks both report
Claude Opus 5.5 leads on 17 of the 20 benchmarks both report. Higher is better. Each score links to where it was published.
| Benchmark | Claude Opus 5.5 | Muse Wonder |
|---|---|---|
| MirrorCode (Epoch AI) | 78.9% | 45.6% |
| LMArena Agent (LMArena) | 0.2094 | 0.0314 |
| LMArena Elo | 1509 | 1507 |
| LMArena WebDev (LMArena) | 1810 | 1652 |
| APEX-Agents (Mercor) | 73.5% | 66.1% |
| EBR-bench (Epoch AI) | 71.4% | 31.4% |
| FrontierMath Tier 4 v2 (Epoch AI) | 95% | 70.7% |
| FrontierMath Tiers 1-3 v2 (Epoch AI) | 91.2% | 82.1% |
| Furniture Assembly (Epoch AI) | 83.3% | 54.2% |
| LiveBench Agentic Coding (LiveBench) | 71.7% | 62.7% |
| LiveBench Coding (LiveBench) | 89.3% | 80.7% |
| LiveBench Data Analysis (LiveBench) | 80.3% | 81.6% |
| LiveBench Instruction Following (LiveBench) | 67% | 73% |
| LiveBench Language (LiveBench) | 86.3% | 82.9% |
| LiveBench Mathematics (LiveBench) | 97.1% | 96.5% |
| LiveBench Reasoning (LiveBench) | 92.2% | 90.6% |
| Mystery Game Puzzles (Epoch AI) | 71% | 51% |
| OTIS Mock AIME 2024-2025 (Epoch AI) | 100% | 99.4% |
| Terminal-Bench 4.0 (Vals AI) | 65.2% | 49.5% |
| Vending-Bench 2 (Andon Labs) | 9235.25 | 9432.18 |
FAQ
Is Claude Opus 5.5 better than Muse Wonder?
Claude Opus 5.5 scores 74.1 on the Respan Index (#1), ahead of Muse Wonder at 61.4 (#14). Claude Opus 5.5 leads on 17 of the 20 benchmarks both report.
Which is cheaper, Claude Opus 5.5 or Muse Wonder?
Claude Opus 5.5 lists at $2 input and $10 output per 1M tokens; Muse Wonder at $4 and $20. Claude Opus 5.5 is 2.0x cheaper per token at list price.
Which has the larger context window?
Claude Opus 5.5 accepts 1M tokens and Muse Wonder 1.0M tokens.