OpenAI cuts off Cursor after SpaceX takeover; Elon Musk is the ‘big reason’

OpenAI is ending its partnership with Cursor after SpaceX completed its $60 billion acquisition of the AI coding tool's parent, Anysphere. OpenAI models stop working in Cursor from November 12, 2026, and the company says the reason is trust, pointing to Elon Musk's track record with contracts. Cursor says OpenAI models handle just 5% of its traffic, while Anthropic is adding compute for Claude. Musk's reply: he could not care less.