Elon Musk's SpaceX has invested $2 billion in his AI startup, xAI. This move follows xAI's merger with X, valuing the company at $113 billion. The investment aims to integrate AI across SpaceX, Tesla, and X, with Grok playing a central role. While boosting xAI's ambitions, the funding raises financial risk concerns for SpaceX, already investing heavily in Starship.