OpenAI will end Cursor's direct access to its models on November 12, following SpaceX's $60 billion acquisition of Cursor's parent, Anysphere, which closed on August 14.
Cursor, a code-assistant platform bought by SpaceX, relies only lightly on OpenAI. Its CEO said OpenAI models handle about 5% of Cursor's user traffic and the companies are talking through the change, and OpenAI said it provided the maximum contractual notice for the wind-down.
Elon Musk responded on X, calling OpenAI's leadership " utterly untrustworthy."
OpenAI framed the move as driven by a lack of confidence that SpaceX would use its technology within OpenAI's terms after past disputes with Musk-controlled companies, and Anthropic said it will increase compute to support Claude inside Cursor
The decision lands as SpaceX's xAI has pushed model performance, its Grok 4.5 rollout was described by analysts as closing the performance gap with rivals like OpenAI and Google.
Independent reporting also flagged the cut and the ownership change reported the move.
Cursor and OpenAI say discussions are ongoing as the November 12 cutoff approaches November 12.
