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Meta Releases Muse Glimmer and Pushes U.S. to Back Open-Weight AI

Zuckerberg argues U.S. rules should be eased so American open-weight models can better compete with high-performing Chinese rivals.

Overview

  • Meta publicly released Muse Glimmer on Monday, an open-weight model whose trained parameters are available for download.
  • Muse Glimmer is a compact, distilled model reported at about 30 billion parameters and engineered to run locally on a Mac or PC with a single GPU for agent-style tasks like scheduling and file management.
  • Meta said it will also open the weights for a version of its larger Muse Spark (1.2), letting outside developers inspect and modify the model’s trained parameters.
  • The company pledged governance changes that give independent directors the authority to approve safety criteria before model releases while Zuckerberg called for policy shifts favoring distillation and broader access.
  • The move heightens a U.S.-China competition over open-weight models, ties into recent security incidents that have split opinion on openness, and could change costs and control for developers who want local, customizable AI.