Musk Says SpaceX Engineering Data Will Feed Training of xAI's 2-Trillion-Parameter Grok Model

Elon Musk says xAI will fold SpaceX's proprietary engineering data into the supplemental training of Grok's new 2-trillion-parameter model, a move he claims will "dramatically improve" the system's engineering capabilities. The disclosure, made on July 21, 2026, positions the rocket maker's real-world hardware knowledge as a distinctive input that rivals such as OpenAI and Anthropic cannot easily replicate.