OpenAI to end model access to Cursor after acquisition by Elon Musk's SpaceX

OpenAI announced late Friday that it is ending developers' access to its models on Cursor, following the acquisition of the AI coding startup by Elon Musk's SpaceX earlier this month.

Cursor CEO Michael Truell said, in a post on the SpaceX-owned social network X Friday night: "OpenAI models serve about 5% of Cursor user traffic, and we're speaking with the OpenAI team to resolve this. Cursor was one of the very first users of OpenAI, we've worked closely with their team for years, and we've trusted their platform to be neutral infrastructure for our business."

In their announcement, 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."

Its "proposed shutoff date" for OpenAI models via Cursor is Nov. 12, 2026. OpenAI also said it would not provide future models to Cursor as it winds down the agreement.