The Open Giant That Turned Proprietary

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Meta's new flagship Muse Spark shipped April 8 \u2014 the first proprietary model from a company built on open-weight AI. The Llama brand isn't gone, but it's no longer the frontier. Here's what that means for your stack and the 3 billion people about to use it without knowing it.

AI Mindset framing Muse Spark (April 8) $115\u2013135B capex 2026 3.4B+ MAU distribution

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