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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 con…↗

·@AIatMeta·Oct 15, 2026·model-release·agentic-coding·meta·multimodal·muse-spark-open