Meta releases weights for Muse Spark Open
Meta has released the weights for its new AI model, Muse Spark Open, positioning it as a highly capable open-weight model for developers. The model is designed for complex reasoning and coding tasks and is available through various cloud platforms and API services.
Why it matters
The release of powerful open-weight models democratizes access to advanced AI, potentially accelerating innovation while raising new safety and regulatory questions.
Meta releases weights for Muse Spark Open left The model weights can be downloaded via Amazon SageMaker AI, Google Cloud Model Garden, Hugging Face, and Microsoft Foundry Models [File] REUTERS REUTERS https://th-i.thgim.com/public/incoming/733cb3/article71591084.ece/alternates/FREE_1200/2026-10-13T125437Z_1426624128_RC291W9NV9CV_RTRMADP_3_BRITAIN-COURT-META.JPG Dado Ruvic FILE PHOTO: The Meta logo is seen in this illustration taken, August 22, 2022. REUTERS/Dado Ruvic/Illustration/File Photo Meta described its Muse Spark Open as the “most capable US open-weight model to date” Meta has released the weights for its Muse Spark Open model, describing it as the “most capable US open-weight model to date.” Meta says its new AI models on par with OpenAI, Anthropic storyline 1 Natively multimodal, Muse Spark Open comes with 816 billion total parameters (42B active) and a 1M-token context window. Meta noted that the model’s strengths include coding and agentic work, long-horizon tasks, complex software engineering, and multi-step reasoning.
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