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Meta releases Muse Spark Open with downloadable weights and conditional commercial use
- Who
- Meta
- What
- released Muse Spark Open, an open weight multimodal model
What happened
Baoyu reports that Meta released Muse Spark Open on October 15, an open-weight model with 816B total parameters, 42B active parameters, and a 1M token context window. It accepts text, images, video, and audio and outputs text; the Muse Model License permits free commercial use subject to attribution, usage restrictions, and a separate agreement for qualifying API businesses. The model card lists minimum memory requirements of 700GB for NVFP4 and 2TB for BF16, while Meta describes optimization for two Mac Studio machines with 512GB unified memory each.
The same story is shown in the picks as 《Meta releases Muse Spark Open, an open-weight multimodal mixture-of-experts model》
Reported by 10 sources
The story so far
Meta released downloadable weights for Muse Spark Open, a multimodal model built for coding and agentic work, with local Mac and cloud deployment options. Artificial Analysis ranks it first among US open-weight models on its Intelligence Index, with a score of 39 at the xhigh setting. The model has approximately 816 billion parameters, 42 billion active per token, and up to one million tokens of context. It accepts text, images, audio and video and generates text. Meta says it can run on two Apple M5 Ultra Mac Studios using MLX; Baoyu reports that the configuration uses 512GB of unified memory per machine. vLLM says its support is verified on NVIDIA and AMD GPUs and TPUs. Ollama Cloud offers access through Pro, Max, Pay-as-you-go and Teams plans. Amazon SageMaker JumpStart offers BF16 and NVFP4 variants in US East (N. Virginia) and US East (Ohio) at launch, charging for endpoints whenever they are running, including while idle. The Decoder reports that free use requires the label “Built with Muse Spark Open.” Baoyu reports that attribution and usage restrictions apply, and businesses selling API access to the model or modified versions must notify Meta and sign a separate agreement if their combined revenue with affiliates exceeded $20 million over the preceding 12 months.
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