Meta says Muse Spark Open is the most capable U.S. open-weight AI model to date. [2, 12]
The multimodal model has 816 billion total parameters. [2] It has 42 billion active parameters. [2] Its context window is 1 million tokens. [2]
Meta designed the model for complex, long-horizon tasks, including advanced software engineering and multi-step reasoning. [2]
The launch marks a collaboration with Apple. Meta optimized the model to run locally on Mac Studio computers powered by Apple's M5 Ultra chip. [2, 12]
The release adds an open-weight alternative to proprietary models from rivals such as OpenAI and Anthropic, intensifying competition in the AI industry. [12]