OpenAI is ending the contract under which it supplied GPT-family models to Cursor, the developer coding tool. The company said in an August 28 blog post that it had notified SpaceX of the decision. Cursor was recently acquired by SpaceX, and this action is OpenAI's direct response to that acquisition.
What was decided
OpenAI notified SpaceX of its intent to wind down the contract and proposed a model shutoff date of November 12, 2026. The company said it gave "the maximum notice provided by our contract" to preserve as much time as possible for developers to keep accessing its models through Cursor. During the wind-down window, Cursor will not receive newly released OpenAI models.
Proposed shutoff date November 12, 2026
Partnership length Nearly 4 years
Clause invoked Change-of-control cancellation right
Why the cutoff — "Musk companies' history of breaking contracts"
OpenAI's stated rationale is trust. The company said it "cannot be confident that SpaceX will use our technology within our terms of service," and pointed directly to a history of contract violations by Musk-owned entities.
First, after Musk acquired Twitter — now part of SpaceX — the company broke the terms of its contract with OpenAI, among others. Second, OpenAI noted that earlier this year Musk admitted under oath that xAI, also now part of SpaceX, had violated OpenAI's terms of service. OpenAI said its custom agreement with Cursor included a clause allowing cancellation within a limited window after a change of control, and it exercised that right.
OpenAI also referenced its upcoming model, Astra, arguing that as AI capabilities advance it has "a new level of accountability" to ensure its models are used in accordance with its terms.
Impact on developers
The most directly affected are the developers who have relied on OpenAI models inside Cursor. After November 12, Cursor users will need to move to other options.
| Item | Detail |
|---|---|
| What's cut off | Direct access to OpenAI (GPT-family) models inside Cursor |
| During wind-down | New OpenAI models are already unavailable |
| Alternatives | Anthropic's Claude, Cursor's own models, xAI's Grok |
| Trigger | SpaceX's acquisition of Cursor (change of control) |
What it means
The decision goes beyond a single supply-contract ending: it shows how exposed generative-AI infrastructure is to shifts in corporate control. A product that leans heavily on a specific model API — like a coding tool — can lose core functionality the moment the relationship between that model provider and the product's owner sours. For Cursor users, it's a reminder that "multi-model support" is not a marketing line but a risk-management necessity.
At the same time, it shows the legal and personal rivalry between OpenAI and Musk spilling down to the product level. With Cursor now under the SpaceX umbrella, the odds rise that xAI's Grok becomes Cursor's default model.
- OpenAI announced on August 28 that it will end its model-supply contract with Cursor, with a proposed shutoff date of November 12.
- The stated reason is that OpenAI cannot trust SpaceX to honor its terms of service, citing prior contract violations by Musk companies (Twitter, xAI).
- OpenAI invoked the contract's change-of-control clause and will not supply new models during the wind-down.
- Cursor developers will need to switch to Anthropic's Claude, Cursor's own models, or xAI's Grok.