OpenAI says it plans to wind down its contract providing OpenAI models to Cursor following Cursor's acquisition by SpaceX, with a proposed shutoff date of November 12, 2026.

In an announcement published August 28, OpenAI said it notified SpaceX of its decision and would provide the maximum notice allowed under its contract. The company said the decision was difficult because it wants its models to remain broadly available to developers.

OpenAI said its decision is based on concerns about whether SpaceX will use its technology in accordance with OpenAI's terms of service.

The decision also comes as OpenAI prepares to introduce its upcoming Astra model, which the company says creates an increased responsibility to ensure that its technology is used according to its terms.

OpenAI Sets November 12 Shutoff Date

OpenAI said it intends to end the contract providing its models to Cursor on November 12, 2026.

The company said it is using the maximum notice period available under its agreement in order to give developers as much time as possible to retain access to OpenAI models through Cursor.

OpenAI did not announce an immediate shutdown.

Instead, the company said it has chosen the latest cancellation date permitted under its agreement while also deciding not to provide future models to Cursor.

For developers who rely on OpenAI models through Cursor, the decision means the transition period will continue until the proposed November 12 date.

OpenAI said it is aware that developers are among those most directly affected by the change and said it intends to support them during the transition.

Why OpenAI Is Ending the Agreement

OpenAI said its primary concern is whether SpaceX will comply with its terms of service.

The company said that, when working with large partners, it typically uses custom contracts designed to establish compliance requirements and ensure that integrations can operate safely at scale.

OpenAI pointed to its previous contractual experiences involving companies associated with Elon Musk.

According to OpenAI, after Musk acquired Twitter, now part of SpaceX, the company breached the terms of its contract with OpenAI.

OpenAI also said Musk acknowledged under oath earlier in 2026 that xAI, which OpenAI says is now also part of SpaceX, had violated OpenAI's terms of service.

These previous experiences contributed to OpenAI's decision regarding the Cursor agreement.

OpenAI said it cannot be confident that SpaceX will use its technology within OpenAI's terms of service based on these experiences.

The claims about those previous contractual violations are OpenAI's characterization in the announcement.

Cursor's Change of Control Triggered a Contractual Window

OpenAI said its custom agreement with Cursor includes a limited period during which OpenAI can cancel the contract following a change of control.

That contractual provision is important to the timing of the decision.

Rather than ending access immediately, OpenAI said it is holding the cancellation until the latest date it can while ensuring that future models will not be provided to Cursor.

This means the November 12 date reflects the contractual notice period described by OpenAI rather than an immediate termination of access.

The company did not provide specific information about the contractual terms or the exact length of the cancellation window.

Astra Adds Another Consideration

OpenAI also connected the decision to the development of its upcoming model, Astra.

The company said that as AI capabilities advance, it has a greater level of accountability to ensure that upcoming models are used in accordance with its terms.

OpenAI therefore decided not to provide future models to Cursor while continuing the existing arrangement until the latest cancellation date permitted under its agreement.

The announcement does not provide a release date, technical specifications, performance information, or additional deployment details for Astra.

Additional details were not disclosed in the announcement.

What the Decision Means for Cursor Developers

The immediate impact highlighted by OpenAI is on developers who use OpenAI models through Cursor.

OpenAI said it has worked with Cursor for nearly four years and expressed respect for the company's team, product, and contribution to the developer community.

However, the contractual change means OpenAI's model access through Cursor is expected to end under the proposed November 12, 2026 timeline.

OpenAI said it understands that developers are the people most affected by the decision.

The company said it is prepared to provide additional support during the transition, although it did not specify what that support will include.

Key timeline

August 28, 2026
OpenAI announces its intention to wind down the Cursor model contract.

Until November 12, 2026
OpenAI says developers can retain access to its models through Cursor during the contractual notice period.

November 12, 2026
Proposed shutoff date for OpenAI model access through the agreement.

OpenAI did not provide a later alternative date in the announcement.

Why Custom AI Contracts Matter

The announcement also provides insight into how OpenAI approaches agreements with large technology partners.

OpenAI said large partnerships typically involve custom contracts intended to establish compliance with its terms of service and support safe operation at scale.

That approach becomes particularly relevant when control of a company changes.

In Cursor's case, OpenAI said the change of control created a limited contractual period during which it could cancel the agreement.

The decision demonstrates how contractual provisions can become an important part of managing access to increasingly capable AI models.

For enterprises and AI developers, the development highlights the importance of understanding how model access agreements address ownership changes, compliance requirements, and future model availability.

This is an analysis based on the announcement, not a description of additional contractual provisions that OpenAI has not disclosed.

OpenAI's Relationship With Cursor

OpenAI emphasized that the contractual decision does not reflect a negative assessment of Cursor's product or team.

The company said it has worked with Cursor for nearly four years and expressed "enormous respect" for the team, its product, and what it has built for developers.

The distinction is important.

OpenAI's stated reason for ending the agreement concerns its confidence in future use of its technology under the terms of service following the change of control.

The company did not state that Cursor's product itself had violated OpenAI's terms.

Instead, OpenAI focused on the implications of the acquisition by SpaceX and its previous experiences with companies associated with Musk.

A Broader Issue for AI Model Providers

The announcement highlights a broader issue facing AI model providers as their systems become more capable.

Model providers increasingly need to consider not only how their models are technically integrated into third-party products, but also how those products and companies operate under contractual and policy requirements.

OpenAI's decision shows how a change in ownership can affect an existing AI model relationship.

For companies building products around third-party AI models, this could make contractual continuity an important consideration alongside technical integration.

That does not mean every acquisition will result in a model contract being terminated. OpenAI's announcement specifically concerns its agreement with Cursor and the circumstances surrounding its acquisition by SpaceX.

The Developer Impact Is Central to the Transition

OpenAI acknowledged that developers who rely on its models through Cursor will be among those most affected.

The company said it cares about their experience during the transition and is prepared to go "above and beyond" to support them.

However, the announcement does not provide details about specific migration resources, alternative model arrangements, pricing changes, or technical transition plans.

The company did not provide specific information about these areas.

For developers, the most concrete information currently available from OpenAI is the proposed November 12, 2026 shutoff date and the continuation of model access during the notice period.

What Has Not Been Disclosed

OpenAI's announcement establishes the decision and the proposed timeline, but it leaves several operational questions unanswered.

The company did not provide:

• Specific details of the Cursor contract

• The exact contractual cancellation provision

• Details of the transition support for developers

• Information about alternative model arrangements

• Technical details about how access will be discontinued

• A detailed roadmap for Cursor after November 12

• Release information for Astra

• Performance specifications for Astra

Additional details were not disclosed in the announcement.

What This Means for Enterprise AI Partnerships

OpenAI's decision highlights how AI partnerships can involve more than technical compatibility.

As model providers work with developers, enterprises, and large technology companies, contracts can establish requirements governing how models are accessed and used.

A change in corporate ownership can therefore become relevant to an existing AI relationship if the underlying agreement contains provisions addressing a change of control.

In this case, OpenAI said its agreement with Cursor includes such a provision and that it is using the associated cancellation window to wind down the relationship.

For organizations building products around external AI models, the announcement provides a reminder that long-term access can depend on both technical and contractual arrangements.

This is an industry implication drawn from the announcement, rather than a claim about contracts beyond the Cursor agreement.

Conclusion

OpenAI says it will wind down its contract providing models to Cursor following Cursor's acquisition by SpaceX, with a proposed shutoff date of November 12, 2026.

The company said the decision is driven by concerns about whether SpaceX will use OpenAI technology within its terms of service, citing its previous contractual experiences with companies associated with Elon Musk.

OpenAI said its agreement with Cursor provides a limited period to cancel the contract following a change of control. The company therefore plans to maintain access during the notice period while not providing future models to Cursor.

For developers, the key date is November 12, 2026.

OpenAI also emphasized that it has worked with Cursor for nearly four years and continues to respect its team and product. The company said it intends to support developers affected by the transition.

The announcement ultimately illustrates how AI model access can be shaped not only by technical relationships, but also by contracts, ownership changes, compliance requirements, and the responsibilities associated with increasingly capable AI systems.