Meta released Muse Spark 1.3 and will not say whether it opens the weights. The AI Act's open-source exemption stops exactly where frontier models start.

Meta released Muse Spark 1.3, its most powerful AI model, with a paid developer API as it closes the gap on OpenAI and Anthropic in the frontier

Meta released Muse Spark 1.3 and will not say whether it opens the weights. The AI Act's open-source exemption stops exactly where frontier models start.