OpenAI moves to cut off Cursor's model access after SpaceX's acquisition

OpenAI said it would wind down Cursor’s access to its models by 12 November 2026, invoking a change-of-control clause in its agreement with the coding-assistant maker following SpaceX’s completed acquisition of Cursor’s parent company, Anysphere. OpenAI said in the announcement it “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,” and pointed to a federal trial in which Musk testified that xAI had used distillation techniques on OpenAI’s models to train Grok.

The 12 November date was described as the maximum notice period allowed under the existing contract; OpenAI said Cursor could still access its models independently by supplying its own API key, and that OpenAI’s IDE extensions would continue to work inside Cursor regardless. Cursor chief executive Michael Truell said his team was in discussions with OpenAI “in hopes of coming up with a resolution,” and put OpenAI models at about 5% of Cursor’s traffic — figures reported by Engadget and CNBC that OpenAI’s own post did not include.

The dispute set two frontier labs’ commercial relationship against a corporate ownership change neither had fully controlled: SpaceX and xAI had themselves merged earlier in 2026, and Cursor’s acquisition closed only weeks before OpenAI’s move. It left OpenAI enforcing exclusivity-adjacent terms against a company now owned by its most litigious competitor, while Cursor’s own usage of OpenAI’s models was, by its own account, a small share of what it served.