Technology and AI
A change of control clause ends a four year supply deal, and the customer did nothing wrong
By Staff Writer | 30 August 2026
OpenAI has given notice to wind down the contract that puts its models inside Cursor, relying on a cancellation right that opened when SpaceX bought the coding company for 60bn dollars.
On 28 August OpenAI notified SpaceX that it intends to wind down the contract under which it supplies its models to Cursor, the artificial intelligence coding tool. It has proposed a shutoff date of 12 November 2026 and says it is giving the maximum notice the contract provides, so that developers keep access for as long as the agreement allows. The two companies have worked together for nearly four years.
Nothing about Cursor's own conduct is in issue. SpaceX completed its 60bn dollar purchase of the company on 14 August, and it is the identity of the new owner that OpenAI has objected to, saying it cannot be confident the technology will be used within its terms of service given its experience of contracts with companies controlled by Elon Musk. SpaceX absorbed X and xAI in February of this year.
The customer, which had no part in the transaction that triggered the right, learned of the decision on a 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.
Michael Truell, co-founder and chief executive, Cursor
The clause doing the work
OpenAI has been unusually plain about the mechanism. Its custom agreement with Cursor gives it a limited time window to cancel following a change of control, and it has chosen to exercise that right at the latest date open to it rather than at the earliest, while declining to supply future models. Two features of the drafting are worth pulling out. The right is time limited, so it lapses if it is not taken up, which is why the decision arrived a fortnight after completion rather than at leisure. And the notice period is fixed by the contract, not by the party giving notice, which is what allows a supplier to end a four year relationship on a date the customer cannot move.
A change of control clause transfers the risk of who owns your counterparty from the supplier to the customer. The customer performs perfectly and loses the contract anyway.
What a buyer should take from it
Anyone buying a critical input under a bespoke agreement should read this as a live demonstration rather than a curiosity. Three questions follow from it. Does the supply agreement contain a change of control right at all, and does it bite on an acquisition of the customer as well as of the supplier. If it does, how long is the window, and does the clock start on signature, on completion or on notification. And what is the fixed notice period, because that number, agreed years earlier and rarely negotiated hard, becomes the whole of the transition planning if the right is ever used.
The commercial exposure here is smaller than the headline suggests. Cursor puts OpenAI models at about 5 per cent of its user traffic, and its other suppliers have moved to fill the space. Tom Brown, a co-founder of Anthropic, said his company would continue to increase compute to support its models in Cursor. That is the ordinary consequence of a supply contract ending: a rival takes the volume.
The more interesting consequence is for anyone drafting the next agreement of this kind. A change of control right that can be exercised without any breach, on a counterparty that has done nothing, is a powerful term to hold and an expensive one to concede. The parties negotiating model supply contracts this autumn will be reading the clause with fresh attention, and buyers will want to know what happens to their business if someone else buys them.