Elon Musk Announces Grok 4.5 AI Model in Private Beta at SpaceX and Tesla
Elon Musk announced that xAI's latest AI model, Grok 4.5, has entered private beta testing at SpaceX and Tesla. Based on the 1.5-trillion-parameter V9 foundation model with supplemental training from the Cursor coding assistant, early evaluations suggest its performance is close to or may exceed Anthropic's Opus model. Musk noted ongoing reinforcement learning improvements and said new models will be trained from scratch monthly at SpaceX for the rest of the year, with internal deployments serving as testing grounds before wider release.