OpenAI just acquired Cursor and immediately cut off supply! Musk angrily retorts: Altman and Brockman are thieves.

OpenAI has announced it will stop providing AI models to the programming tool Cursor, recommending that direct access to OpenAI models be shut down by November 12, 2026, and that future models, including Astra, will no longer be offered to Cursor.

The move comes just two weeks after SpaceX completed its acquisition of Cursor's parent company, Anysphere.

OpenAI explained in a blog post that the decision was made because, given the history of contract violations by Musk's companies, it cannot be confident that SpaceX will use the technology in accordance with the terms of service.

OpenAI also noted that the X platform violated its contract terms with OpenAI after being acquired by Musk. Under the agreement between the parties, once a "change of control" occurs, OpenAI has only a limited window to terminate the contract, and this notice represents the maximum notice period allowed under the agreement.

Musk quickly responded on the X platform, saying "I don't care at all," and directly attacked OpenAI CEO Altman and President Brockman, claiming the two are "completely untrustworthy and stole an open-source nonprofit."

Musk also altered their names into satirical versions embedding "Scam" and "Stock." This marks the latest round in the long-running feud between Musk and OpenAI.

Musk previously sued OpenAI and Altman, accusing them of abandoning OpenAI's original nonprofit mission for their own benefit, equivalent to "stealing a charitable organization."

The case has been dubbed the "trial of the century for AI," with damages sought reaching $150 billion. In May 2026, a federal jury unanimously rejected Musk's claims after just 90 minutes of deliberation, ruling that he had filed the lawsuit beyond the statutory deadline.

Cursor co-founder and current SpaceX executive Michael Truell revealed on the X platform that the company is in communication with the OpenAI team to resolve the issue.

Hours after OpenAI announced its decision, Anthropic co-founder Tom Brown stated that the company plans to increase computing power to provide more support for the Claude model in Cursor.

Claude is currently the most popular model on the Cursor platform, and Anthropic's move is seen by outsiders as an attempt to seize users while the opportunity arises.

The backdrop to this supply cutoff is SpaceX's massive acquisition of Cursor. On June 16, SpaceX announced it would acquire Anysphere, the startup behind Cursor, in an all-stock deal valued at $60 billion, with the transaction completed on August 14.