Meta just dropped Muse Spark Open 🔥
816B total parameters, 42B active, with a 1M token context window. Built for coding, long-running agents, and complex reasoning, with native text, image, video, and audio support.
Today we’re releasing Muse Spark Open, the most capable US open-weight model to date.
Built for coding and agentic work, it excels at long-horizon tasks, complex software engineering, and multi-step reasoning.
Key Model Specs:
→ 816B total / 42B active parameters
→ 1M token context window
→ Natively multimodal across text, image, video, audio