OpenAI says it's ending its deal with Cursor because Elon Musk's companies violate contracts

OpenAI said it could not trust SpaceX to comply with its terms of service, citing Twitter's past conduct under Elon Musk.

Fabrice Coffrini/AFP via Getty Images OpenAI said it will end its contract with Cursor, a startup that was acquired by SpaceX.

The company pointed to past conduct by Twitter, another Elon Musk-owned company.

OpenAI said it would not provide Cursor access to future models, including Astra.

OpenAI said it's ending its contract with Cursor, a coding startup recently acquired by SpaceX, because it doesn't trust an Elon Musk-owned company to comply with its terms of service.

The company said in a statement published on Friday night that it plans to shut off Cursor's access to OpenAI models on November 12.

"This decision was incredibly tough, as we care deeply about our models being broadly available for developers," OpenAI said.

"We are making this choice because we cannot be confident that SpaceX will use our technology within our terms of service, based on our experience with Elon Musk's companies violating contracts." Spokespeople for SpaceX and OpenAI did not immediately return a request for comment.

OpenAI did not accuse Cursor of violating any terms.

It instead pointed to past conduct by another Musk-owned company, Twitter, which Musk bought in 2022 and merged with SpaceX earlier in February.

OpenAI said in its blog post that Twitter had previously violated the terms of its contract, citing a New York Times story reporting that Musk cut off OpenAI's access to Twitter's data.

OpenAI also wrote that the SpaceX CEO said under oath earlier this year that xAI had violated OpenAI's terms by training Grok from OpenAI's output.

Musk said at the time that it was "partly" true that xAI had distilled OpenAI's models, The Verge reported in April.

OpenAI said that it uses "custom contracts" with large partners like SpaceX to ensure compliance.