Overview
Anthropic now recommends Claude Opus 5.5 as the starting point for most workloads. Meta calls Muse Wonder its most capable model, built for complex software engineering and long-horizon agentic work. Muse Wonder is currently in preview.
Claude Opus 5.5
Model ID claude-opus-5-5, with a 1M-token context window and 128K max output (up to 300K on the Batch API with a beta header).$4 per 1M input tokens and $20 per 1M output tokens, with cache reads at 5% of the input price.Adaptive thinking is always on with default effort medium. The reliable knowledge cutoff is June 2026.Available on the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry and Claude Platform on AWS.Meta Muse Wonder
Model ID muse-wonder-1.0. Accepts text, image, video, audio and PDF input with text output, and has a 1,048,576-token context window.Reasoning effort ranges from minimal to max. It supports tool calling, structured output, search grounding and computer use.Available on Meta Model API (Standard mode only) and in Muse Code. A higher-capability Muse Wonder Full is only in Muse Code on the Power Usage and Maximum Usage plans.Not currently available in South Korea. Meta's models page does not list token prices; they are on Meta's pricing page.How to choose
Opus 5.5 is generally available on all the major clouds, with published prices and lifecycle dates.Muse Wonder accepts more input types (video, audio, PDF) but is still in preview, so check availability and pricing for your region first.Neither vendor publishes a shared benchmark that compares the two directly.No hands-on testing was conducted for this comparison. Every figure above comes from the official pages listed under Research sources, as published on or before October 22, 2026. Where a vendor has not published a number, we say so instead of estimating it.