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OpenAI proposes cutting off Cursor's model access on November 12
OpenAI says it will wind down the contract that supplies its models to the AI code editor Cursor, proposing a shutoff on November 12, 2026, after SpaceX bought Cursor's maker. Teams standardised on Cursor now have a dated deadline.
Chandni Melwani
Founder & Editor
Aug 28, 2026 · 2 MIN READ
The News
On August 28, 2026, OpenAI published a notice saying it intends to wind down the contract that provides OpenAI models to Cursor, the AI code editor, following SpaceX's acquisition of Cursor's maker Anysphere. OpenAI's wording is that it will wind down the contract "with a proposed shutoff date of November 12, 2026" — proposed, not executed. OpenAI says the reason is that it "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," a characterisation SpaceX has not accepted. OpenAI grounds it in two named incidents: that Twitter broke its contract terms after Musk acquired it, and that Musk admitted under oath this year that xAI had violated OpenAI's terms of service. It also says its agreement with Cursor gives it "a limited time window to cancel it after a change of control," which is why the notice comes now. OpenAI also says it has decided "to hold the contract cancellation to the latest date we can while not providing future models to Cursor," and that it is giving the maximum notice its contract provides. Cursor announced on August 14 that the acquisition had completed; it has published nothing about OpenAI's notice.
Know More
- — The date: November 12, 2026, which OpenAI calls a proposed shutoff date rather than a set one. OpenAI says it is the latest date its contract allows.
- — The forward-looking half: OpenAI says it will not provide future models to Cursor, and names its upcoming model Astra as what it now has "a new level of accountability" to police. The gap widens from the notice date, not from November 12.
- — Not all hostile: the same notice credits nearly four years of work with the Cursor team and says OpenAI has enormous respect for it.
- — The reason, as OpenAI states it: that it cannot be confident SpaceX will use its technology within OpenAI's terms of service, citing Twitter's contract breach after Musk acquired it and Musk's sworn admission this year that xAI violated those terms. SpaceX has not responded.
- — Direction of travel: Musk entities sued OpenAI twice this year and lost both — a jury verdict on May 18 and a dismissal with prejudice on June 15 — so nothing was live between them when the notice went out.
- — Cursor's side: its blog said on August 14, 2026 that it 'has officially been acquired by SpaceX,' a post that names Grok 4.6 and not OpenAI. It has published through August 27 on unrelated product work and nothing on this notice.
November 12 is the date OpenAI has put on the end of Cursor’s access to its models. In a notice published August 28, OpenAI said it intends to wind down the contract supplying its models to the AI code editor, calling that day a “proposed shutoff date,” after SpaceX bought Cursor’s maker Anysphere in mid-August. OpenAI attributes the decision to its own lack of confidence that SpaceX will honour its terms of service, an account it grounds in Twitter’s contract breach after Musk bought it and in Musk’s sworn admission this year that xAI violated those terms, and says it will supply Cursor no future models.
Any lead whose team runs Cursor on OpenAI models now has a dated deadline and three options, each priced differently: switch model provider inside Cursor and the habits survive; move editors and the retraining is real but the vendor question is settled; stay on SpaceX’s in-house models and the dependency you just watched break belongs to whoever bought your tooling. The audit comes first — which seats actually route to OpenAI models — and November is the wrong month to start it. Whatever replaces those seats goes through the same approval machinery as any other tool budget, and that machinery does not run on a ten-week notice period. Cursor, meanwhile, has published nothing: its blog ran through August 27 on other subjects, and its August 14 acquisition post mentions Grok while leaving OpenAI unnamed. Leads are choosing without hearing from the vendor they would be choosing about.
So what: every team that put an AI coding tool in the critical path without a second provider now has a dated reason to build one, and the open lane is the unglamorous middle — model-routing, evaluation and switching infrastructure that makes an editor’s model choice reversible.
Related
Frequently Asked Questions
Is November 12 a firm date?
No. OpenAI calls it proposed, and it is one side's stated intention rather than an executed cancellation, so it can move or be contested. A lead still cannot wait on it: the review work has to start before anyone knows whether the date slipped.
What changes before the shutoff date?
Nothing switches off on the announcement. But OpenAI says it will not supply future models to Cursor, so a team on OpenAI models inside Cursor stops receiving new ones from now, whatever happens to the November date. OpenAI applied that half of the notice immediately.
What has Cursor said?
It has not said anything about it. Cursor's blog has posted through August 27 on unrelated product work, and its August 14 acquisition post names Grok 4.6 without mentioning OpenAI. A replacement plan from Cursor would change the size of the job on the buyer's side, and buyers are sizing it without one.
Sources
- OpenAI, "Our decision on Cursor following its acquisition by SpaceX" — the proposed November 12 date, the terms-of-service reasoning, and the future-models line
- Cursor, "Cursor is now a part of SpaceX" (August 14, 2026) — Cursor's own statement that the acquisition completed
- TechCrunch, "SpaceX officially closes its Cursor acquisition" (August 15, 2026)
Chandni Melwani
Chandni Melwani is the founder and editor of New in AI, covering AI agents, M&A, and enterprise adoption. She holds a Master's in Management of Artificial Intelligence from Queen's University and brings a practitioner's perspective from her work in Data and AI leadership.
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