Musk: only 3 companies had enough coding data to build a "compelling SI"
What's the deal? SpaceX has acquired AI coding startup CursorDealroom has a profile for this one. Try Dealroom →, maker Anysphere, in an all-stock deal valued at $60 billion. Elon Musk said the purchase was about training data, not just compute. "In order to create a compelling SI, you need a LOT of training data and need to SOLVE CODING," he wrote, naming OpenAI, Anthropic, and Cursor as the only three organisations with enough coding training data.
Why now? SpaceX merged with Musk's xAI in 2026 and is racing to compete with Anthropic and OpenAI, which both offer AI coding tools. The company agreed to the deal in April 2026, committed in June, and closed on August 14, 2026.
What's the endgame? Musk's bet is that coding data is the key to a frontier AI model. Since partnering, Cursor jointly trained xAI's Grok 4.5 and Grok 4.6 models with SpaceX, using "trillions of tokens of Cursor data" — the first models Cursor helped build that weren't solely for software engineering.
What changes? Cursor gained access to Colossus, SpaceX's supercomputer running 200,000 Nvidia GPUs and also used by Anthropic, to scale its own models. OpenAI ended its partnership with Cursor after the acquisition closed.
The signal: The deal reframes what frontier AI developers are buying. Rather than chasing raw compute alone, Musk is treating proprietary coding data as the scarce input — and consolidating one of the few sources of it under his control.
Read more: Business Insider
