On 15 October 2026, Meta released the weights of Muse Spark Open, a multimodal model with 816 billion total parameters (42 billion active) and a one-million-token context, optimised to run on two Mac Studios with M5 Ultra chips. Before adopting it in production, read the license — open-weight stops at $20 million in service revenue.

On October 12, 2026, Meta’s Superintelligence Lab shipped Muse Wonder and Muse Wonder Full, its first frontier models, positioned around “active memory” and agentic work rather than raw benchmark leadership. The launch closes Meta’s lightweight-model era and raises a governance question: what do you do with an agent that remembers your messages, calendar, and documents?

On September 22, 2026, researcher Patrick Wardle showed that an undocumented setting in Muse, Meta’s AI assistant, lets a simple local command redirect voice dictation and steal the account authentication token. Cut back the permissions you grant AI agents and wait for Meta’s fix before deploying new ones.