Meta Releases Muse Spark, First Closed-Source Model from Meta Superintelligence Labs

Summary

Meta has released Muse Spark, the first model from Meta Superintelligence Labs (MSL), the unit formed under Alexandr Wang after Meta's $14.3 billion investment to acquire a stake in Scale AI. The model features two operating modes: a fast mode for casual queries and a "Contemplating" mode that orchestrates multiple sub-agents to reason in parallel, positioning it as a direct competitor to Google's Gemini Deep Think and OpenAI's GPT-5.4 Pro extended reasoning capabilities. A notable technical cl