Open source is so back. Zuck just announced Meta is opening the weights for Muse Glimmer, with Muse Spark 1.2 coming soon But a year ago, ev…

Open source is so back. Zuck just announced Meta is opening the weights for Muse Glimmer, with Muse Spark 1.2 coming soon But a year ago, everyone doubted Meta's position in the AI race In an interview I did with him, he admitted where they missed the mark: "Llama 4 was not on the trajectory that I thought it needed to be on. It was in many ways a big improvement over Llama 3, but we weren't trying to be a bit better than Llama 3. We're a frontier lab. It wants to be doing leading work." So he blew it up and rebuilt: "I felt like I'd learned enough about how to set up a lab that I wanted to reformulate the work we were doing." His conviction behind the rebuild: "AI is gonna be the most important technology in our lives, in our lifetimes. Building the capacity to build absolutely leading models is gonna be really critical for unlocking creativity." Media Today we're also opening the weights for Muse Glimmer, a great 30B parameter dense model that can run locally. Soon we'll also release the weights for Muse Spark 1.2, our latest foundation model. Meta is a strong supporter of open source and I'm proud of these releases. Congrats …

Related

• Meta's new model is Muse Spark, and meta.ai chat has some interesting tools
• Introducing Muse Glimmer
• Introducing Muse Glimmer: an open-weight model optimized for always-on local agent workflows
• Many people were doubting Meta's position in the AI race. Yesterday, they dropped Muse Spark 1.1, now one of the strongest agentic models, a…

Source: Rowan Cheung (X) | 2026-08-11