OpenAI cuts Cursor off, weeks after SpaceX bought it

OpenAI has told SpaceX it's terminating Cursor's direct access to its models on November 12, 2026 — the maximum notice its contract allows. The stated reason isn't technical or commercial: OpenAI says it "cannot be confident that SpaceX will use our technology within our terms of service," citing its experience with Elon Musk's companies violating contracts, X included.

The timing is the whole story. SpaceX closed its $60B all-stock acquisition of Anysphere, Cursor's parent, in mid-August after securing an option back in April. The cutoff notice landed roughly two weeks later — a deal that took four months to clear regulators got unwound by its supplier in fourteen days.

The blast radius looks smaller than the headlines suggest. Cursor co-founder Michael Truell puts OpenAI models at about 5% of Cursor's total user traffic, and says the teams are "speaking with the OpenAI team to resolve this issue." Developers still routing through GPT in Cursor have ~76 days to move. The subtext is uglier: this is the same feud that produced Musk's $150B suit against OpenAI, which a federal jury shot down earlier this year.

Why it matters: model access is now a lever in corporate warfare — your coding tool's roadmap can be rewritten by a fight you have no stake in.