Meta Announces Muse Spark, First Model Release Since Llama 4

Summary

Meta has announced Muse Spark, described as its first model release since Llama 4 launched approximately one year ago in April 2025. Notably, Muse Spark is a hosted model rather than an open-weights release, representing a significant strategic shift for Meta, which has historically championed open-source AI through its Llama model family. The model is accessible through meta.ai chat, and the API is currently described as private. Simon Willison's analysis highlights several interesting tools a