Meta Launches Muse Glimmer and Announces Muse Spark 1.2 Weights Release

The US tech giant on Monday launched Muse Glimmer, a 30-billion-parameter open-weight model light enough to run locally on personal computers, while also announcing plans to release the weights of its latest flagship Muse Spark 1.2 model. The releases positioned Meta directly against top Chinese open-weight models, offering a competitive performance without the geopolitical baggage, analysts said. “Many American users and companies will prefer to build with American models if there’s a good open-source version,” said Kyle Chan, a fellow at the Brookings Institution. “They would prefer not to deal with compliance risk, reputational risk and other unknowns when it comes to Chinese models.” Meta’s new offerings compete directly with top Chinese alternatives across both the flagship and lightweight tiers.