Meta’s Muse Spark series, a family of multimodal large language models from Meta Superintelligence Labs emphasizing agentic workflows, coding, and tool use, has followed a roughly monthly cadence through version 1.3 in early September 2026. Trader sentiment for a 1.4+ proprietary release centers on the October 15 launch of Muse Spark Open—an 816B-parameter mixture-of-experts open-weights model optimized for desktop inference on Apple silicon and platforms like Hugging Face—which did not satisfy versioning criteria and resolved the prior October 31 deadline market to “no.” This shift toward open access and integration with Muse Code and the Meta Model API has slowed proprietary iteration, leaving markets pricing a November 30 resolution at roughly 62% for no release. Key upcoming catalysts include Meta’s product roadmap signals and competitive benchmark updates against frontier models.