• October 16, 2026
Apple and Meta Bury the Hatchet: Muse Spark Open Puts an 816B-Parameter Open-Weight Model on the Mac

Meta has released Muse Spark Open, an 816-billion-parameter open-weight model for coding and AI agents, in a surprise partnership with Apple — the rival it was feuding with just two weeks ago. Optimized to run locally on two M5 Ultra Mac Studios with 1TB of unified memory, it is the most capable US open-weight model to date, aimed squarely at Chinese open-source rivals.