OpenAI has told SpaceX it plans to terminate the contract under which it provides models to Cursor, the AI coding tool SpaceX acquired, with Nov. 12 proposed as the end date. The company said that date represents the longest notice period allowed under the agreement and described the decision as difficult because of the broad developer use of its models. At the same time, OpenAI said it does not trust SpaceX to use the technology in line with the contract, citing what it described as Elon Musk’s prior breach history, xAI’s use of OpenAI models in training, and contract issues tied to Musk’s acquisition of X. Musk responded on X that he did not care at all and called Sam Altman and Greg Brockman fraudsters, accusing them of stealing from an open nonprofit. The report also said Musk, an OpenAI co-founder, later filed a $150 billion lawsuit against OpenAI and lost after missing a deadline. Separately, OpenAI had previously tried and failed to acquire Cursor developer Anysphere, before SpaceX bought Cursor for $60 billion in a merger completed on Aug. 15. Cursor co-founder and current SpaceX executive Michael Truell said the company views OpenAI’s platform as neutral infrastructure and is in talks with OpenAI. He added that OpenAI models account for 5% of Cursor user traffic. Anthropic co-founder Tom Brown said the company will keep expanding compute capacity to offer Claude on Cursor.
OpenAI has informed SpaceX that it plans to terminate the contract under which it supplies models to Cursor, the AI coding tool SpaceX acquired, according to ChainCatcher. The proposed end date is Nov. 12, which OpenAI said is the longest notice period allowed under the agreement.
OpenAI said the decision was difficult because it values the broad use of its models by developers. Even so, the company said it does not trust SpaceX to use the technology in accordance with the contract, citing what it described as Elon Musk’s prior breach history. It also referred to xAI’s use of OpenAI models in training and contract issues related to Musk’s acquisition of X.
Musk responded on X that he did not care at all. He also called Sam Altman and Greg Brockman fraudsters and accused them of stealing from an open nonprofit.
Musk was previously a co-founder of OpenAI. The report said he later filed a $150 billion lawsuit against the company and lost after missing the filing deadline.
On the deal side, OpenAI had previously attempted to acquire Anysphere, the developer of Cursor, but the effort did not succeed. SpaceX later acquired Cursor for $60 billion, and the merger was completed on Aug. 15.
Michael Truell, Cursor co-founder and now a SpaceX executive, said Cursor views the OpenAI platform as neutral infrastructure and is in discussions with OpenAI. He added that OpenAI models account for 5% of Cursor user traffic.
Anthropic co-founder Tom Brown said the company will continue expanding compute capacity to provide Claude models on Cursor.
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