Meta Superintelligence Labs has launched Muse Spark, the first model in its Muse series, marking the first milestone after a comprehensive restructuring of its AI R&D. This model supports tool usage, visualized chain-of-thought reasoning, and multi-agent coordination. Operating under a closed-source model, its design and code are not publicly disclosed. Muse Spark excels in multimodal perception, reasoning, health, and agent-based tasks, and will support Meta's app ecosystem in the future, including Instagram, Facebook, and WhatsApp.