OpenAI cuts SpaceX off from its models inside Cursor
OpenAI is cutting SpaceX off from its models inside Cursor by November 2026, over trust, not price.
OpenAI is walking away from one of its own customers over trust, not price. Today it told SpaceX, which now owns the AI coding tool Cursor, that it will wind down the contract supplying OpenAI's models inside Cursor, with a proposed cutoff date of November 12, 2026. That is the maximum notice period the contract allows, and OpenAI says it is using the full window on purpose, to give developers as much time as possible to adjust. This is a rare, public case of a major AI lab refusing to keep serving a powerful, well funded customer, and it shows that even at the very top of the AI industry, trust still outranks who can pay.
The reason OpenAI gives is blunt: it says it cannot be confident SpaceX will use its technology within its terms of service (the rules for using OpenAI's models), based on its own experience with Elon Musk's companies breaking contracts before. After Musk bought Twitter, which is now folded into SpaceX, that company broke the terms of its OpenAI contract, one of several companies OpenAI says has done that. More specifically, Musk admitted under oath earlier this year, meaning in sworn legal testimony, that xAI, his AI company and also now part of SpaceX, had violated OpenAI's terms of service, terms that are similar to the ones xAI itself uses for its own customers.
The mechanism here matters. OpenAI's custom agreement with Cursor includes a clause giving OpenAI a limited window to cancel the deal after a change of control, meaning a change in who owns the company. SpaceX's acquisition of Cursor triggered that clause. OpenAI also points to its own upcoming model, called Astra, and says it now carries a new level of responsibility to make sure that model is used strictly within its rules before it goes out. Rather than cutting Cursor off immediately, OpenAI chose to hold the cancellation to the latest date the contract allows, while confirming it will not hand Cursor any future models beyond that point.
OpenAI is careful to separate the company it is punishing from the product it is walking away from. It says it has worked with Cursor for nearly four years and has enormous respect for the team, the product, and what it has built for developers, and that the people actually hurt by this decision are the developers who rely on OpenAI's models inside Cursor day to day. It says it is ready to go further than usual to support them through the transition.
Zoom out and this is as much a supply chain story as a Musk story. A tool like Cursor exists on top of models that OpenAI controls, and OpenAI can pull that access over a dispute that has nothing to do with the tool's own team, and everything to do with who now owns the company behind it. It is a reminder that building on someone else's AI models means your access can be revoked over decisions made two ownership layers above you, not just over your own product's behavior.
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.via OpenAI →