Cursor Co-founder responds to reports of a split with OpenAI: Currently negotiating a resolution, OpenAI models account for around 5% of Cursor's user traffic.

Beating AI News (Dongcha) – Cursor co-founder and CEO Michael Truell posted that OpenAI has issued a notice planning to block Cursor users from accessing OpenAI models in three months. Truell said OpenAI models currently account for roughly 5% of Cursor’s user traffic, and the company is in talks with OpenAI’s team to resolve the issue. Truell noted that Cursor was among OpenAI’s earliest users, with the two parties collaborating for years. Cursor has long trusted OpenAI to operate its platform as a "neutral infrastructure" for its business. This partnership shift comes as Cursor faces dual pressures: intensifying competition in the AI coding tools market, and model providers building their own applications. Previous reports noted that two weeks after SpaceX completed its $60 billion acquisition of Cursor, OpenAI announced the end of their nearly four-year partnership. New models will no longer integrate with Cursor, and direct supply of existing models is set to cease on November 12, 2026. The contract between the two parties allows OpenAI to terminate the agreement following Cursor’s acquisition. OpenAI’s move this time is almost a direct rebuke targeting Elon Musk: the company stated that after Musk acquired Twitter, Twitter violated its contract with OpenAI; this year, Musk also admitted in court that xAI had improperly used OpenAI models.