OpenAI says it notified SpaceX on Aug. 28 that it intends to wind down the contract supplying OpenAI models to Cursor. The company proposed Nov. 12, 2026 as the shutoff date, using what it describes as the maximum notice period available under the agreement.
That date is a proposal, not a completed cutoff. Cursor continues to operate, and neither company has published a complete migration plan, a final list of affected models, or a quantified estimate of how many users would need to change their workflows.
The ownership change is confirmed. Cursor announced on Aug. 14 that it had been acquired by SpaceX, completing a process that followed an earlier compute and option agreement disclosed in SpaceX regulatory materials. Cursor says the deal gives it access to a very large GPU fleet and should help it build more capable models at lower cost; that expected benefit remains a company forecast.
OpenAI says it will not provide future OpenAI models to Cursor under the current arrangement. It also acknowledges that developers relying on those models inside Cursor would be affected and says it intends to support their transition.
OpenAI's public explanation includes allegations about prior conduct by companies associated with SpaceX leadership. Those assertions are OpenAI's position and are not independently established in this briefing. The verified operational signal is narrower: OpenAI has announced an intended contract wind-down after Cursor's change of control.
The larger lesson reaches beyond one coding tool. AI applications often combine an interface, proprietary orchestration, outside model APIs, and third-party compute. When ownership or competitive incentives change, access to one of those layers can become a product risk. The app layer is not independent from the model and infrastructure layers beneath it.