October 12, 2026
Muse Wonder: Meta Beats Opus 5.5 on Long Coding Projects, 57.5 vs 46.3
Meta released Muse Wonder on Oct 12: the Full version scored 56 points on the Artificial Analysis index, just behind Claude Opus 5.5 at 58. The API costs $4 per million input tokens and $20 per million output tokens, and Wonder Full is open to Muse Code subscribers.
The Rundown AI
@therundownai
NEW: Meta released Muse Wonder (codename Watermelon), its new family of AI models, and the results put the company at the front of the field. The top version, Wonder Full, scores 56 points on the Artificial Analysis index, behind only Claude Opus 5.5 (58). It also beats competitors in: - legal tasks (Harvey LAB): 13.1 vs 8.6 for GPT-6 Astra - long coding projects (SWE-Marathon): 57.5 vs 46.3 for Opus 5.5 - coding tasks (DeepSWE): 79.0 vs 74.2 for Opus 5.5 - context retention (MemoryBench): 85.5 vs 81.5 for Opus 5.5 Muse Wonder is already available in the Meta Model API and Muse Code, and Wonder Full is open to paying Muse Code users.
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Muse Spark 1.3 previously scored 48 points on the Artificial Analysis index v4.3, and Wonder Full is 8 points higher. On price, Wonder costs about 3.2x more than Muse Spark on input ($1.25 vs $4) and 4.7x more on output ($4.25 vs $20). Team limit: 3,000 requests per minute and 4 million tokens per minute.
Coding. On long projects Wonder Full scores 57.5, against 46.3 for Opus 5.5. On coding tasks it scores 79.0 against 74.2. On the Artificial Analysis index, one run of the task costs $2.9.
Running it in the terminal: install Muse Code with one line (`curl -fsSL https://dev.meta.ai/install.sh | sh` on macOS and Linux, `irm https://dev.meta.ai/install.ps1 | iex` on Windows), check it with `muse --version`, then run `muse` in your project folder. Sign in through the browser; in a non-interactive environment, use the META_API_KEY variable. The Muse Code docs list muse-spark-1.2 as the default model and do not describe how to pick Wonder in the CLI.
Next milestone: third-party runs of the same tests. Until then, the numbers come only from the announcement.