Cursor's CEO Answered the Cutoff With a Number: OpenAI Models Are About 5% of Cursor Traffic

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Michael Truell responded to OpenAI's termination notice within hours and far more calmly than the announcement, saying OpenAI models account for roughly 5% of Cursor's total user traffic, that Cursor is disappointed and in talks to resolve it, and that Cursor had trusted OpenAI to be neutral infrastructure since taking OpenAI Startup Fund seed money in 2023. The r/singularity post carrying the quote drew 187 upvotes and 63 comments, and a smaller r/OpenAI thread argued the 5% figure is the bigger story than the cutoff. For builders the read is that Cursor's default routing has already moved off OpenAI, so the November 12 date is a smaller product event than the headline implies.