Meta releases Muse Spark Open model
Meta published the Muse Spark Open announcement on its research blog on 2026-10-15, with a companion developer guide on its dev site. A model listing named Muse-Spark-Open-816B-A42B appeared on Hugging Face the same day, and 9to5Mac reported the launch.
Why it matters
Builders can now access a newly released open model from Meta through Hugging Face, which may be an option for self-hosted or customized AI features. Check the model card and license terms before using it in production.
Who should care
AI application developers, ML engineers, ecommerce brands building AI features, indie builders evaluating open-weight models
What you can do
Open the Hugging Face model card for Muse-Spark-Open-816B-A42B, review its license and hardware requirements, and run it on a sample task from your product to compare against your current model.