A model for longer workflows
Digitale Profis reports on Meta’s release of Muse Spark Open. Published on October 15, 2026, the model targets coding and longer agent workflows. It accepts text, images, audio and video as input and generates text responses. Access is available through hosted API providers as well as deployment on an organisation’s own infrastructure, bringing the same model into different operating environments.
Total weights and active parameters
Muse Spark Open has 816 billion parameters in total, with 42 billion active for a given processing step. The smaller active portion reduces the work involved in each step, but does not remove the need to hold the complete model weights in memory. This distinction is central to the channel’s description of self-hosting: the full model remains a substantial hardware commitment, even though only part of it is active at once.
Local deployment and its licence
Meta demonstrates operation on two Mac Studio systems with M5 Ultra chips and 512 GB of unified memory each. That setup illustrates the scale of the local deployment described in the report. For companies and specialist teams, the released weights provide a route to operating and adapting the model on their own hardware. Commercial use is governed by Meta’s Muse Model License, so the availability of downloadable weights comes with defined licence terms.
