Elon Musk said that SpaceX had deployed "a few dozen" top Starlink and Starship engineers and Cursor staff to work on the AI model.

Musk said reinforcement learning is continuing to improve the model and that "Grok Build," xAI's coding-agent harness, is being refined daily. He framed the SpaceX and Tesla…

xAI launches Grok 4.5 in private beta with SpaceX and Tesla, powered by a 1.5 trillion parameter V9 model that rivals Anthropic's Claude Opus.