OpenAI to Cut Off Cursor's Access to Its Models Following SpaceX Acquisition
OpenAI announced it will end the contract that lets Cursor offer OpenAI models to its users, effective November 12, 2026, following SpaceX’s acquisition of Cursor. The company said it can no longer be confident SpaceX will use its technology within OpenAI’s terms of service.
Details
- The core concern: OpenAI pointed to “our experience with Elon Musk’s companies violating contracts,” specifically citing SpaceX’s earlier acquisition of Twitter breaching its original contract terms, and xAI admitting under oath this year that it violated OpenAI’s terms of service while training its own models on OpenAI data
- Forward-looking risk: OpenAI said it can’t ensure compliance with its terms as its own model capabilities advance, specifically flagging its upcoming Astra model as one that will not be made available to Cursor under SpaceX ownership
- Long notice period: OpenAI says it is giving the maximum contractual notice period, roughly 20 months, so Cursor developers have extended time to migrate off OpenAI models before the November 12, 2026 cutoff
- Support commitment: OpenAI said it will offer affected developers assistance “above and beyond” its standard support during the transition
- Tone: OpenAI said it has “enormous respect” for Cursor’s team and product despite ending the model-supply agreement, calling the decision “an incredibly tough” one
- Background: SpaceX’s $60 billion acquisition of Cursor closed on August 14, 2026, about two months after the deal was first announced, and this contract dates back nearly four years
What happened next
Cursor now faces a hard deadline to shift its default and available models away from OpenAI’s lineup before mid-November, likely leaning further on Anthropic’s Claude models and its own in-house options in the interim. The move is the clearest sign yet that OpenAI is willing to cut off major distribution partnerships over compliance concerns tied to a customer’s new ownership rather than the customer’s own conduct.