OpenAI winds down Cursor model contract

OpenAI is winding down the custom contract that supplies its models to Cursor, with a proposed shutoff date of November 12, 2026, according to its company post. Read this as a change-of-control cancellation triggered by SpaceX's takeover of Cursor, not a ban on Cursor and not Cursor being shut down. The two sides say they are still talking, so treat the November date as a notice, not a settled outcome.

A contract wind-down, not a Cursor shutdown

This is a contract wind-down. Cursor's custom agreement gives OpenAI a limited window to cancel after a change of control, and OpenAI is using it after SpaceX completed its acquisition of Cursor, reported by Bloomberg and CNBC at roughly $60 billion in all-stock terms and closed on August 14. November 12 is the maximum notice the contract allows, so OpenAI is giving the longest runway it can rather than cutting access on short order. OpenAI also said its next model, Astra, will not be supplied to Cursor at all, per The Next Web. What is ending is a model-supply relationship; Cursor keeps running, and OpenAI is not exiting coding tools.

The reason is about Musk, not Cursor

OpenAI put the rationale in one sentence: "We are making this choice because we 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." It cited two episodes: after Musk acquired Twitter, now part of SpaceX, that company broke OpenAI's terms, and under oath earlier this year Musk admitted xAI, also now part of SpaceX, had violated them. The important nuance the shorter write-ups skip is that OpenAI does not accuse Cursor itself of any breach; the concern is the compliance record of the SpaceX and Musk group that now owns it. OpenAI kept the tone respectful toward the Cursor team and said it is "ready to go above and beyond to support developers moving off," which is the part that matters if you build on Cursor.

The responses, not a resolution

Everyone answered, and none of it is a settlement yet. Cursor co-founder Michael Truell said on X the company is speaking with OpenAI to resolve the decision, and put OpenAI models at about 5% of Cursor traffic, a number that frames how much of the product is actually exposed. Anthropic said it will increase compute support for Claude models inside Cursor, positioning itself to absorb the workloads OpenAI is dropping. Musk, for his part, replied that he "couldn't care less," per Reuters. Report these as reactions to a notice, not as evidence the contract will be saved or that a replacement is locked in.

The takeaway

If you run OpenAI models through Cursor, put November 12 on the calendar and start moving the workloads that depend on them now, because the change-of-control cancellation is OpenAI's to exercise and Truell's "we are talking" is not a reinstatement. The 5% traffic figure says most of Cursor survives this untouched, so the real question is narrower than the headlines: whether the specific features that lean on OpenAI models get re-routed to Anthropic or another provider before the cutoff, or whether a deal reopens access. Watch for a reinstatement notice or a signed carve-out; absent one, plan around the shutoff rather than the negotiation.

For related deal and platform context, see our coverage of Stripe and Advent dropping their PayPal bid, Nvidia pausing its AI cloud revenue-share deals, and Anthropic's model hardware standard.