- SpaceX's roughly $60 billion acquisition of Cursor prompted OpenAI's decision.
- OpenAI will stop supplying its models to Cursor effective November 12, 2026.
- OpenAI cited distrust in contract compliance, pointing to past experience with Elon Musk-affiliated companies.
Why it matters: When a model provider cuts off a customer acquired by a rival, it creates a new supply-disruption risk for any company relying on a single AI vendor, pushing customers to reconsider vendor diversification.