3rd Open LLM Builders Summit – September 30, 2026 at ETH AI Center The third edition of the Open LLM Builders Summit will be held on 30 September 2026 at the ETH AI Center in Zurich, as an official event of the Zurich AI Festival. The event is organized by the Swiss AI Initiative, coordinated by the ETH AI Center and EPFL AI Center. The summit will bring together leading international initiatives developing open foundation models, as well as infrastructure providers, researchers, and policymakers, to chart the path toward global, open, and collaborative AI development.