Meta unveiled Muse Glimmer on Monday, an open-weight model built to run AI agents directly on consumer devices—offering the most concrete glimpse yet of CEO Mark Zuckerberg’s "personal superintelligence" concept in action. With 30 billion parameters, Glimmer essentially serves as an open counterpart to Muse Spark, Meta’s most advanced closed model that launched in April. The weights are distributed under the permissive Apache 2.0 license, meaning developers can freely download and tweak them as needed.

Glimmer is tailored to power AI agents capable of handling multi-step tasks—such as calling tools, writing and debugging code, managing files and screenshots, and executing longer workflows—all locally on a Mac or PC equipped with a single consumer GPU. It processes both text and images and was trained across more than 100 languages. Meta envisions Glimmer handling everyday responsibilities like scheduling, drafting messages, and organizing files, which typically demand extensive access to personal data. By keeping that processing on the user’s device rather than sending it to the cloud, Meta is laying the groundwork for a more privacy-conscious personal assistant. The model is also built to be "always-on," functioning "anywhere, anytime, with or without an internet connection."

That vision aligns with the future Zuckerberg has long described for Meta. Last year, he argued that advanced AI should empower individuals rather than remain concentrated in the hands of a select few companies, while also cautioning that Meta would need to be selective about which of its increasingly capable models it released openly, given safety concerns. In a fresh letter on Monday, Zuckerberg echoed that stance, suggesting that distributing superintelligence broadly "has the potential to begin a new era of personal empowerment where individuals can use this powerful new capability to reach their full potential, pursue their interests, and improve their lives and the world more than ever before."

Zuckerberg went on to outline how Meta’s superintelligence could enhance daily life—from a dedicated personal agent that "will work 24/7 on your behalf to improve your relationships, health, career, finances, home management, hobbies, and more" to giving people the tools needed to launch a new business or push scientific progress forward. The most ambitious promise: "everyone will have free or affordable access to these tools."

But access doesn’t necessarily mean ownership. Zuckerberg’s pledge to spread superintelligence widely comes as Meta increasingly separates the models it releases openly from those it retains control over. Muse Spark, the more powerful version, stays closed-weight, while the smaller Glimmer can be downloaded, fine-tuned, and run on personal hardware. As such, Glimmer provides an early signal of where Meta might draw the line between AI that people can own themselves and the more potent intelligence that remains firmly under the company’s watch.