Meta introduced Muse Wonder and Muse Wonder Full on October 12, building on the earlier Muse Spark family. The models target coding and personal or professional agents that carry out multi-step work.
Meta describes Active Memory for retaining relevant context across conversations and Active Focus for recovering from errors during longer tasks. These are vendor descriptions, rather than results of testing by this site.
Muse Wonder is available through Meta Model API and Muse Code. Wonder Full is offered to Muse Code subscribers; a later rollout into the Muse application is distinct from API availability.
Sources: Meta announcement · Model availability