OpenAI sets a shutoff date for Cursor's access to its models

OpenAI has put a date on Cursor. In a note published on August 28, the company said it notified SpaceX that it intends to wind down the contract supplying OpenAI models to the editor, with a proposed shutoff on November 12, 2026. SpaceX now owns Cursor, and that change of control is what opened the cancellation window OpenAI is using.

What OpenAI said

The note is short and unusually direct about motive. OpenAI writes that it cannot be confident SpaceX will use its technology within its terms of service, and it grounds that in two earlier events. After Musk acquired Twitter, now part of SpaceX, the company broke the terms of an OpenAI contract. Under oath earlier this year, Musk admitted that xAI, also now part of SpaceX, had violated OpenAI's terms of service.

OpenAI also says it is giving the maximum notice its contract allows, so developers keep access for as long as possible. That is why the shutoff lands in November rather than next week.

Why a change of control opens the door

Large partners do not run on the public terms of service. OpenAI says it relies on custom contracts with a partner the size of SpaceX, both to enforce compliance and to keep the integration safe at scale. Its agreement with Cursor carries a clause giving OpenAI a limited window to cancel after a change of control, and that window is what is being used now.

There is a forward-looking reason too. OpenAI says its coming model, Astra, brings a new level of accountability for how it is used, and the company has decided not to supply future models to Cursor at all. The wind-down and the withholding of Astra are two decisions announced together, not one.

What it means if you build in Cursor

Nothing breaks today. OpenAI models keep working in Cursor until the proposed shutoff, and OpenAI says it worked with Cursor for nearly four years and wants to support developers through the transition. What changes is planning: any workflow, prompt library or evaluation set tuned to a specific OpenAI model inside Cursor now has an end date attached.

The useful check is how much of your setup depends on one vendor's model rather than on the editor itself. Cursor still offers models from other providers, and work that moves cleanly between models survives November 12 untouched. Work tuned to one model does not.