Grok 4.5: SpaceX & Tesla Test New 1.5T-Parameter AI

Elon Musk has announced that xAI's new Grok 4.5 model is now in private beta testing at SpaceX and Tesla. This model is built on a 1.5-trillion-parameter foundation and was trained with Cursor coding data. Musk shared that early evaluations suggest Grok 4.5's performance is close to, and possibly even better than, Anthropic's Claude Opus. He also mentioned that xAI plans to release new AI models "completely trained from scratch" every month for the rest of the year. This indicates a rapid acceleration in the company's AI development efforts. The V9 foundation model, which Grok 4.5 uses, is roughly three times larger than the current production model. This news shows that advanced AI models are being integrated into major technology companies.