OpenAI Moves to End Model Access for Cursor, with a Proposed Shutoff of November 12

On August 28, 2026, OpenAI published a post saying it had notified SpaceX that it intends to wind down the contract under which it provides OpenAI models to Cursor¹. The proposed shutoff date is November 12, 2026¹. The company says this is the maximum notice its contract allows, chosen to maximize the time developers can keep using its models through Cursor¹.

The question of who controls the models running inside an AI code editor has surfaced with a date attached.

The reasons OpenAI gives

OpenAI says it is making this choice because it cannot be confident that SpaceX will use its technology within its terms of service¹. It points to two things¹.

The first is a claim that Twitter, after Musk acquired it, broke the terms of OpenAI’s contract¹. The second is a claim that, under oath earlier this year, Musk admitted xAI had violated OpenAI’s terms of service¹. OpenAI notes that both Twitter and xAI are now part of SpaceX, and cites the two as the basis for its judgment¹. Both are OpenAI’s own account; we have not been able to confirm independent verification of either.

On the contract itself, OpenAI says its custom agreement with Cursor gives it a limited time window to cancel after a change of control¹. The SpaceX acquisition is what opened that window.

No future models, including Astra

The other point the post states plainly is that future models will not be provided to Cursor¹. OpenAI writes that as AI capabilities advance, it has a new level of accountability to ensure that its “upcoming model,” Astra, is used in accordance with its terms, and that it has therefore decided to hold the cancellation to the latest date it can while not providing future models to Cursor¹.

In practice that is a two-step arrangement: current models remain available until November 12, and no new ones arrive in the meantime. Astra is the model OpenAI described as producing results on unsolved problems in mathematics and theoretical computer science. OpenAI also recently disclosed a decision to pause model training while it built out monitoring, so narrowing how a model is distributed on terms-of-service and safety grounds is not new for the company.

The post closes by saying OpenAI has worked with Cursor for nearly four years, that the people most affected are the developers who rely on OpenAI models in Cursor, and that it intends to support them through the transition¹.

Two weeks after the acquisition closed

Cursor’s relationship with SpaceX began with a model-training partnership in April 2026, and the acquisition closed on August 14. In its own blog post at the time, Cursor described what it was getting as access to a very large GPU fleet, saying this would let it build more capable models at lower cost. This notice is the first visible change the acquisition has produced in Cursor’s relationships outside the company.

Cursor has kept shipping since the close, including an update on August 27 that lets cloud agents start without an external GitHub connection. As of this writing, the most recent post on Cursor’s blog is dated August 18, and we found no post there about this matter².

Which models you can pick may be decided upstream

It is worth being precise: this is not a story about Cursor becoming unusable. OpenAI’s post covers only the supply of its own models and says nothing about Cursor’s own models or those of other providers¹. Cursor itself signalled at the time of the close that it intends to build cheaper, more capable models on SpaceX compute. How the range of model choices ends up looking will depend on what the company announces.

What matters in practice may be less the November 12 date than the structure behind it. Choosing an AI coding tool usually means looking at the list of models it offers. This case sets a precedent in which that list can shrink because the tool’s ownership changed. If your prompts and workflows are tuned to a particular model, how easily you can absorb that in November depends on whether you already have a fallback in mind.

Sources

1. Our decision on Cursor following its acquisition by SpaceX - OpenAI official announcement (August 28, 2026)
2. Cursor Blog - Cursor official blog (checked August 30, 2026)