OpenAI plans to cut off Cursor from its AI models after Elon Musk’s SpaceX bought the coding outfit.
According to Reuters, the move marks another round in the long-running scrap between OpenAI chief executive Sam Altman and Musk, who has never knowingly left a feud unfed.
Musk and Altman have been at odds for years, with the row peaking earlier this year during Musk’s $150 billion lawsuit against OpenAI. During the trial, Musk’s lawyer said witnesses had called Altman a liar, while OpenAI argued that Musk had tried to seize control of the company.
Writing in its bog OpenAI said: “We are making this choice because we cannot be confident that SpaceX will use our technology within our terms of service, based on our experience with Elon Musk’s companies violating contracts.”
Musk replied on X on Saturday with the usual understated diplomacy, writing: “I couldn’t care less.”
He accused Altman and OpenAI president Greg Brockman of being “untrustworthy,” while repeating his claim that they “stole an open source nonprofit.”
Musk had sued OpenAI and Altman for “stealing a charity” by betraying the outfit’s original nonprofit mission for their own enrichment. A federal jury ruled against Musk earlier this year, finding he had filed the case too late.
Cursor co-founder and SpaceX executive Michael Truell said on X that the company was in talks with OpenAI to resolve the issue. Anthropic said it planned to increase compute to support Claude models in Cursor.
OpenAI said X had breached its contract after Musk bought the platform. It proposed a 12 November 2026 shutoff date after SpaceX completed its $60 billion all-stock takeover of Anysphere, the startup behind Cursor, earlier this month.
