Claude Opus 5.5 vs Muse Wonder
Claude Opus 5.5 (2026) and Muse Wonder (2026) are frontier-tier reasoning models from Anthropic and AI at Meta. Both ship a 1M-token context window. On LMArena Text Arena - Creative Writing, Claude Opus 5.5 leads by 41 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Pick Claude Opus 5.5 for general evaluation; token pricing is tied, so keep Muse Wonder only for already-validated prompts or route constraints.
Decision scorecard
Local evidence first| Signal | Claude Opus 5.5 | Muse Wonder |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1M | 1M |
| Cheapest output | $20/1M tokens | $20/1M tokens |
| Provider routes | 5 tracked | 3 tracked |
| Shared benchmarks | LMArena Text Arena - Creative Writing leader | 2 shared |
Decision tradeoffs
- Claude Opus 5.5 holds a shared-benchmark lead on LMArena Text Arena - Creative Writing, ahead by 41 points.
- Claude Opus 5.5 has broader tracked provider coverage for fallback and route flexibility.
- Claude Opus 5.5 uniquely exposes Structured outputs in local model data.
- Local decision data tags Claude Opus 5.5 for Coding, RAG, and Agents.
- Local decision data tags Muse Wonder for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Claude Opus 5.5
$8,200
Cheapest tracked route/tier: Anthropic
Muse Wonder
$8,200
Cheapest tracked route/tier: Meta Model API
Estimated monthly gap: $0.00. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
- Check replacement coverage for Structured outputs before moving production traffic.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
- Claude Opus 5.5 adds Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-09-22 | 2026-10-12 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Architecture | Decoder Only | - |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Restricted | Restricted |
| Knowledge cutoff | 2026-06 | - |
Pricing and availability
| Pricing attribute | Claude Opus 5.5 | Muse Wonder |
|---|---|---|
| Input price | $4/1M tokens | $4/1M tokens |
| Output price | $20/1M tokens | $20/1M tokens |
| Providers |
Capabilities
| Capability | Claude Opus 5.5 | Muse Wonder |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude Opus 5.5 | Muse Wonder |
|---|---|---|
| LMArena Text Arena - Creative Writing | 1534.0 | 1493.0 |
| Chatbot Arena | 1509.0 | 1509.0 |
Deep dive
On shared benchmark coverage, LMArena Text Arena - Creative Writing has Claude Opus 5.5 at 1534 and Muse Wonder at 1493, with Claude Opus 5.5 ahead by 41 points; Chatbot Arena has Claude Opus 5.5 and Muse Wonder tied at 1509. The largest visible gap is 41 points on LMArena Text Arena - Creative Writing, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on JSON / Tool use: Claude Opus 5.5 and structured outputs: Claude Opus 5.5. Both models share vision, multimodal input, reasoning mode, and JSON / Tool use, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Claude Opus 5.5 lists $4/1M input and $20/1M output tokens on the cheapest listed provider, while Muse Wonder lists $4/1M input and $20/1M output tokens on the cheapest listed provider. A 70/30 input-output blend is tied on the cheapest listed routes. Availability is 5 providers versus 3, so concentration risk also matters.
Choose Claude Opus 5.5 when vision-heavy evaluation and broader provider choice are central to the workload. Choose Muse Wonder when vision-heavy evaluation are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, Claude Opus 5.5 or Muse Wonder?
Claude Opus 5.5 supports 1M tokens, while Muse Wonder supports 1M tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Claude Opus 5.5 or Muse Wonder?
Neither is cheaper on listed token pricing. Both list $4/1M input and $20/1M output tokens on the cheapest listed route. Provider discounts, batch pricing, or route-specific tiers can still change the final bill.
Is Claude Opus 5.5 or Muse Wonder open source?
Claude Opus 5.5 is listed under Proprietary. Muse Wonder is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Claude Opus 5.5 or Muse Wonder?
Both Claude Opus 5.5 and Muse Wonder expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, Claude Opus 5.5 or Muse Wonder?
Both Claude Opus 5.5 and Muse Wonder expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Where can I run Claude Opus 5.5 and Muse Wonder?
Claude Opus 5.5 is available on Anthropic, AWS Bedrock, GCP Vertex AI, Microsoft Foundry, and OpenRouter. Muse Wonder is available on Meta Model API, OpenRouter, and Vercel AI Gateway. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-10-17. Data sourced from public model cards and provider documentation.