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.

Prices from LiteLLM's price fileChecked October 21, 2026

Claude Opus 5.5 vs Muse Wonder 1.0 side by side

Headline prices in US dollars per 1M tokens: each model's own lab where it sells it, otherwise its cheapest provider. Source: LiteLLM model price file, as of October 21, 2026.
	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

Cheapest provider for each

Claude Opus 5.5: Anthropic at $4.00 input and $20.00 output per 1M tokens (claude-opus-5-5)
Muse Wonder 1.0: Meta Model API at $4.00 input and $20.00 output per 1M tokens (meta/muse-wonder-1.0)

Benchmark scores

From the Epoch AI Benchmarking Hub (CC BY 4.0), data as of October 12, 2026. Each model's best reported reasoning setting is shown in brackets. Higher is better. Only benchmarks with a score for both models are shown.
Benchmark	Claude Opus 5.5	Muse Wonder 1.0
Math
FrontierMath (tiers 1-3)	91.2% (max)	82.1% (max)
FrontierMath (tier 4)	95.0% (max)	70.7% (max)
OTIS Mock AIME 2024-2025	100.0% (max)	99.4% (max)

When to pick which

Pick Claude Opus 5.5 for

Available from 8 providers through LiteLLM, vs 1.

From differences in the data above only; where the data is equal, no reason is given.

Call Claude Opus 5.5 or Muse Wonder 1.0 with LiteLLM

Both use the OpenAI format through LiteLLM, so switching is a model name change. Set each provider's API key in the environment first.

Python SDK

from litellm import completion

messages = [{"role": "user", "content": "Hello!"}]

# Claude Opus 5.5
response = completion(model="claude-opus-5-5", messages=messages)

# Muse Wonder 1.0
response = completion(model="meta/muse-wonder-1.0", messages=messages)

# Claude Opus 5.5, falling back to Muse Wonder 1.0 if the call fails
response = completion(model="claude-opus-5-5", messages=messages, fallbacks=["meta/muse-wonder-1.0"])

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.