Muse Spark Open, the Most Capable US Open‑Weight Model to Date (research.meta.ai)

Muse Spark Open has been released, boasting the most advanced capabilities among US open-weight models to date. Available for the first time on desktop Apple M5 Ultra Mac Studios, this natively multimodal model features an impressive 816 billion parameters, with 42 billion active, and offers a substantial 1 million-token context window. It is specifically designed for complex tasks, making it an asset for coding, software engineering, and multi-step reasoning challenges. This launch is significant for the AI/ML community as it democratizes access to powerful AI models, allowing individuals to run sophisticated applications directly from their homes. Muse Spark Open is compatible with various inference engines like SGLang and Hugging Face Transformers and is optimized for a range of hardware platforms including AMD, Intel, and NVIDIA. Developers can easily customize the model through the PyTorch framework, paving the way for innovative applications and enhanced agentic capabilities. The model weights are also made readily available through popular cloud platforms, ensuring widespread accessibility within the tech community.