# Claude Opus 5.5 vs Muse Wonder 1.0

As of October 21, 2026, Claude Opus 5.5 and Muse Wonder 1.0 cost the same: $4.00 per 1M input tokens and $20.00 per 1M output tokens. Muse Wonder 1.0 has the larger context window: 1,048,576 tokens versus 1,000,000.

- Page: https://models.litellm.ai/compare/claude-opus-5-5-vs-muse-wonder-1.0
- Claude Opus 5.5: https://models.litellm.ai/models/claude-opus-5-5
- Muse Wonder 1.0: https://models.litellm.ai/models/muse-wonder-1.0

## Side by side

| | Claude Opus 5.5 | Muse Wonder 1.0 |
|---|---|---|
| Input, per 1M tokens | $4.00 | $4.00 |
| Output, per 1M tokens | $20.00 | $20.00 |
| Cache read, per 1M tokens | $0.20 | $0.20 |
| Cache write, per 1M tokens | $5.00 | – |
| Context window | 1,000,000 tokens | 1,048,576 tokens |
| Max output | 128,000 tokens | 131,072 tokens |
| Image input | Yes | Yes |
| Tool calling | Yes | Yes |
| Structured output (JSON) | Yes | Yes |
| Prompt caching | Yes | Yes |
| Reasoning | Yes | Yes |
| Providers on LiteLLM | 8 | 1 |
| Price shown is from | Anthropic | Meta Model API |
| Added to LiteLLM | September 22, 2026 | October 12, 2026 |

Headline prices in USD per 1M tokens, from LiteLLM's model price file.

## Cheapest provider for each

- Claude Opus 5.5: Anthropic at $4.00 input per 1M tokens (`claude-opus-5-5`)
- Muse Wonder 1.0: Meta Model API at $4.00 input per 1M tokens (`meta/muse-wonder-1.0`)

## Benchmark scores

| Benchmark | Claude Opus 5.5 | Muse Wonder 1.0 |
|---|---|---|
| FrontierMath (tiers 1-3) (Math) | 91.2% (max) | 82.1% (max) |
| FrontierMath (tier 4) (Math) | 95.0% (max) | 70.7% (max) |
| OTIS Mock AIME 2024-2025 (Math) | 100.0% (max) | 99.4% (max) |

From the Epoch AI Benchmarking Hub (https://epoch.ai/benchmarks), CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/), data as of October 12, 2026: Epoch's own runs and results it collects from each benchmark's leaderboard. Higher is better.

## When to pick which

- Claude Opus 5.5: Available from 8 providers through LiteLLM, vs 1.

## FAQ

### Which is cheaper, Claude Opus 5.5 or Muse Wonder 1.0?

They cost the same: $4.00 per 1M input tokens and $20.00 per 1M output tokens, as of October 21, 2026.

### Which has the larger context window, Claude Opus 5.5 or Muse Wonder 1.0?

Muse Wonder 1.0 has the larger context window: 1,048,576 tokens, versus 1,000,000 for Claude Opus 5.5.

### Can I switch from Claude Opus 5.5 to Muse Wonder 1.0 without changing my code?

Yes. Through LiteLLM both use the OpenAI format, so switching means changing the model name from "claude-opus-5-5" to "meta/muse-wonder-1.0", or pointing a LiteLLM gateway model alias at the other model. You can also use one as a fallback for the other.