OpenAI has told SpaceX it plans to wind down the contract that supplies OpenAI models to Cursor, with a proposed shutoff date of November 12, 2026. The announcement, published on OpenAI News on August 28, 2026, frames the move as a difficult but necessary step tied to SpaceX’s acquisition of Cursor and a history of contract violations by Elon Musk’s companies.
Why the contract is ending
OpenAI says it relies on custom contracts with large partners to enforce its terms of service and ensure safety at scale. After Musk acquired Twitter, now part of SpaceX, the company broke the terms of its contract with OpenAI, according to a New York Times report cited in the announcement. OpenAI also points to Musk’s admission under oath earlier this year that xAI, now also part of SpaceX, had violated OpenAI’s terms of service.
OpenAI’s custom agreement with Cursor includes a limited window to cancel after a change of control. The company says it is holding the cancellation to the latest possible date while not providing future models to Cursor. The notice period is the maximum allowed by the contract, intended to give developers as much time as possible to retain access.
The Astra safety angle
OpenAI ties the decision to its upcoming model, Astra, and what it calls a new level of accountability as AI capabilities advance. The company says it cannot be confident SpaceX will use its technology within its terms of service, based on its experience with Musk’s companies. The announcement links to OpenAI’s earlier statement on responding to critical cyber capabilities, suggesting Astra raises the stakes for compliance.
What this means for developers
OpenAI says it has worked with Cursor for nearly four years and has enormous respect for the team and product. The company acknowledges that developers who rely on OpenAI models in Cursor are the people most affected. It says it cares about their experience in this transition and is ready to go above and beyond to support them, though the announcement does not specify what that support will look like.
For product builders, the key takeaway is that model access through third-party tools can change quickly when ownership changes. If your workflow depends on a specific model inside an IDE or platform, it’s worth mapping your fallback options before a contract deadline arrives.
Sources
AI-assisted summary compiled from the sources above, reviewed by a human before publishing.