Musk: Grok 4.5 is now in private testing at SpaceX and Tesla internally.

Musk mentioned that Grok 4.5 is built on a self-developed foundation with 1.5 trillion parameters from the V9 large model, and introduces Cursor data for additional training. It is currently undergoing private testing within SpaceX and Tesla. Early evaluations show that its performance is close to, or even surpassing, the Opus model. Reinforcement learning based on human feedback continues to significantly improve the model's capabilities, and the Grok scheduling framework is being iteratively optimized daily. Musk stated that SpaceX will release a batch of completely new large models trained from scratch every month this year.