News Meta Muse Spark Open: 816B Open Model Explained Delilah FosterOctober 17, 2026October 18, 2026 Meta Muse Spark Open arrived on October 15, 2026, as the open-weights version of the Muse Spark model. This is big news for anyone who builds with AI. The model is a sparse mixture-of-experts design with about 816 billion total…. Read More