Zuckerberg hits out at closed AI rivals as Meta doubles down on open models

Mark Zuckerberg has taken a swing at closed AI rivals, arguing Meta's return to open-weight models is the right bet for the industry. In remarks tied to the launch of Muse Glimmer, Meta's new 30B-parameter open agentic model, the CEO said open approaches let developers customize, audit, and deploy AI without being locked into a single vendor.

The comments sharpen a long-running split in AI. While OpenAI and Anthropic keep their frontier models behind APIs, Meta has repositioned around open releases, a stance Zuckerberg has pushed as both an engineering argument and a strategic one, especially against Chinese labs that have embraced open-weight releases.

For founders, the shift matters. Open models like Muse Glimmer mean cheaper, privacy-friendly, on-device AI that startups can fine-tune and ship without per-token API bills. If Meta's bet pays off, the open camp could reshape how AI products get built, funded, and owned in the years ahead.