Elon Musk has confirmed that Grok 4.5, the latest iteration of xAI’s large language model, is currently undergoing private beta testing within SpaceX and Tesla environments. The model is being tested internally under controlled conditions in high-demand environments including aerospace simulations, autonomous driving systems, robotics development, and large-scale manufacturing processes. Grok 4.5 is built on a V9 foundation model with an estimated 1.5 trillion parameters, a significant increase compared to the previous Grok 4.4 version estimated at around 1 trillion parameters. Notable reported improvements include enhanced ability in coding and agentic workflows, with the model incorporating “Cursor data” for optimization in modern AI-assisted development environments. Early reactions from the AI community have been a mix of excitement and caution, with experts stressing that independent verification is still required before drawing firm conclusions.