Wall Street Journal 2026-04-08-3
Meta Announces Muse Spark: First Closed-Source Model Marks End of Llama Open-Source Era
Meta shipped Muse Spark as a closed model: the company that spent more on open-weight frontier AI than anyone else just stopped sharing. Alibaba closed Qwen the same month. The pattern isn't "open-source is dying"; it's bifurcating. Companies that used open-source to acquire developer ecosystems (Meta, Alibaba) are closing now that the ecosystem exists. Companies that use open-source as a competitive weapon against incumbents (Google via Gemma, DeepSeek via cost disruption) are doubling down. The strategic question for enterprises: your open-source dependency just became a geopolitical choice between Google and China.