Meta ships its first frontier model, Muse Wonder, then open-sources Muse Spark
Meta's own posts and TechCrunch's report show both halves of its strategy in one week: a paid frontier model and a big open-weight one.
Meta's Superintelligence Lab released Muse Wonder and Muse Wonder Full on Monday, its first attempt at a frontier model. By Meta's own testing they score comparably to Fable 5.1 and GPT-6 Astra, and Meta highlights "active memory", recall of what a user has told the model over weeks or months. Wonder costs $4 per million input tokens and $20 per million output tokens through Meta's API; Wonder Full is only for Muse Code subscribers.
On Thursday Meta also released the weights for Muse Spark Open, an 816-billion-parameter (42 billion active) multimodal model with a 1-million-token context window, which it calls the most capable US open-weight model so far. It is offered through hosting providers and on Hugging Face, and Meta says it runs on two Apple M5 Ultra Mac Studios.
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Open-source artificial intelligence
After exploring Meta releases its first frontier model, Muse Wonder, the definition to hold it against is Open-source artificial intelligence.
The Open Source Initiative's definition: an AI system free to use, study, modify and share, including the training data, code and model parameters, so someone could build a substantially similar result.
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