Investors familiar with the matter told The Wall Street Journal that the rocket company SpaceX has agreed to invest a whopping $2 billion in xAI, the Musk-led firm behind the controversial large language model Grok. This investment makes up almost half of the $5 billion of equity that the AI company raised last month.

The two companies already share close ties with the Grok chatbot (from xAI) now rolling out on Tesla vehicles. Meanwhile engineers affiliated with the automaker had assisted Musk after his 2022 buyout of Twitter --- the social media platform now known as X.