OpenAI says it plans to stop providing its AI models to Cursor, the coding platform recently acquired by Elon Musk’s SpaceX, escalating the long-running rivalry between Musk and OpenAI CEO Sam Altman.
OpenAI said it made the decision because it could not be confident that SpaceX would use its technology within its terms of service, citing what it described as previous contract violations involving Musk’s companies.
The company has proposed 12 November 2026 as the shutoff date.
Musk dismissed the move, writing on X that he “couldn’t care less” and again accused Altman and OpenAI president Greg Brockman of being untrustworthy.
The dispute comes after years of tension between Musk and OpenAI, including a US$150-billion lawsuit in which Musk accused the company of abandoning its original nonprofit mission. A federal jury ruled against Musk earlier this year.
Cursor’s co-founder Michael Truell, now an executive at SpaceX, said the company was speaking with OpenAI in an effort to resolve the issue.
Meanwhile, Anthropic has said it plans to increase computing resources to support its Claude AI models on Cursor.
SpaceX completed its acquisition of Anysphere, the company behind Cursor, earlier this month in an all-stock deal reportedly valued at US$60 billion.
The latest dispute highlights the growing competition between Musk’s AI ambitions and the companies competing with OpenAI in the rapidly expanding artificial intelligence industry.
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