On 2026-10-12 Meta introduced Muse Wonder and Muse Wonder Full, its most capable models yet for personal and professional agentic work. Official posts highlight Active Memory (carry and retrieve what matters across conversations) and Active Focus (persist through hard tasks, recover from errors, clarify and confirm before consequential actions). Muse Wonder is available today via the Meta Model API and Muse Code; Muse Wonder Full is available today for Muse Code subscribers. Third-party Artificial Analysis Intelligence Index (max reasoning) lists Wonder Full at 56 and Wonder at 52 (Spark 1.3 Max was 48).
Key Takeaways
- ✓Announced 2026-10-12 via Meta Newsroom and @AIatMeta (official post)
- ✓Availability (Meta): Muse Wonder on Meta Model API + Muse Code; Muse Wonder Full for Muse Code subscribers only
- ✓Core mechanisms: Active Memory + Active Focus for long-horizon personal/professional agents
- ✓Third-party AA Intelligence Index (max): Wonder Full 56, Wonder 52 vs Spark 1.3 Max 48 (changelog)
- ✓Developer path: Meta Model API at
https://api.meta.ai/v1— API reference
Key Decision Metrics at a Glance
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Background
After rebuilding on Muse Spark, Meta still lacked a closed frontier pair for long-horizon personal and professional agents. Insurance claims, leases, finance/health work, and sustained coding need memory across sessions and persistence when tasks stall. Meta’s Newsroom post positions Muse Wonder / Wonder Full as its most capable models to date.
Architecture
The research blog highlights Active Memory (carry and retrieve what matters across conversations) and Active Focus (try alternatives, recover from errors, clarify, confirm before consequential actions). Evaluation mentions include Harvey LAB, FocusBench, and SWE-Marathon. Models were trained at the Prometheus gigawatt-scale data center on the Muse Spark scaling ladder.
Benchmarks
Vendor charts are on the research blog; a fuller safety report is said to be coming soon — we do not invent unpublished numbers. Third-party Artificial Analysis Changelog (12 Oct 2026) lists Intelligence Index (max): Muse Wonder Full 56, Muse Wonder 52, vs Muse Spark 1.3 Max 48.
Developer path
Muse Wonder is available today via the Meta Model API (https://api.meta.ai/v1, Bearer MODEL_API_KEY) and Muse Code. Muse Wonder Full is for Muse Code subscribers only (not on the public API). Responses, Chat Completions, and Messages protocols are documented. Wonder will later power more Muse product surfaces, starting with subscribers.
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