Cursor co-founder Michael Truell says OpenAI represents just 5% of Cursor's traffic and Cursor trusted OpenAI to be "neutral"; Musk says he "couldn't care less" (Amir Efrati/The Information)

OpenAI has announced plans to terminate its agreement to provide artificial intelligence models to Cursor, a coding tool company owned by Elon Musk's SpaceX. According to OpenAI, the decision was driven by concerns over whether SpaceX would use its technology in compliance with its terms of service. This move escalates the long-running rivalry between Musk and OpenAI CEO Sam Altman.

Cursor co-founder Michael Truell said OpenAI represents just 5% of Cursor's traffic and that Cursor had trusted OpenAI to be "neutral". In response to OpenAI's decision, Musk said he "couldn't care less". Musk has previously accused Altman and OpenAI President Greg Brockman of being "untrustworthy" and claimed they "stole an open source nonprofit".

OpenAI cited its experience with X, formerly Twitter, after Musk acquired the social media platform, as well as Musk's admission under oath that xAI had violated OpenAI's terms of service. The company said it was giving Cursor the maximum notice allowed under its agreement to allow developers to retain access to OpenAI models through the platform for as long as possible, with a proposed shutoff date of November 12, 2026.

Brief written by urgent.news from Techmeme, Nairametrics, Live Science, Business Recorder, Daily Times — 5 reports on this story. Machine-written — may contain errors; check the original before relying on it.