OpenAI has informed Cursor that it will stop providing access to its language models after the coding startup was acquired by SpaceX. According to CNBC, OpenAI announced the decision on Friday evening, saying it cannot trust SpaceX to use its technology in accordance with usage terms.
What happened and timeline
SpaceX completed its acquisition of Cursor on August 14 for $60 billion. OpenAI has stated it will no longer supply new models to Cursor, and plans to disconnect access to existing models by November 12, 2026. The company cited prior instances in which Elon Musk’s companies allegedly violated contracts as part of its rationale.
Cursor’s response
Cursor CEO Michael Truell posted on the X platform that OpenAI-powered traffic represents only five percent of Cursor’s usage. Truell added that discussions with OpenAI are ongoing and emphasized that Cursor had been one of OpenAI’s earlier customers and treated the platform as neutral infrastructure.
Background of the dispute
The move is another episode in a longer-running dispute involving Elon Musk and OpenAI leadership, including Sam Altman and Greg Brockman. Musk sued OpenAI in 2024, alleging the organization had betrayed its original nonprofit mission; he lost that suit according to the report and has indicated plans to appeal.
Market and competitive context
The decision comes amid intensifying competition in the market for AI-based coding tools. Anthropic — a major OpenAI competitor — has sided with Cursor: Tom Brown, co-founder of Anthropic, posted on X that Claude models will remain available in Cursor and that they will increase compute capacity through their partnership with SpaceX. Brown’s post drew criticism from some users who noted that Anthropic banned the Windsurf coding tool from using Claude models last June.
According to the report, OpenAI plans an initial public offering next year, while Anthropic is also considering going public, with some coverage suggesting a potential company valuation around $2 trillion.
Why this matters
The decision affects both technology access and the broader dynamics among leading AI companies. It could change how developers and businesses rely on OpenAI models in coding workflows and highlights how legal and personal conflicts among major tech figures can influence platform availability. Ongoing negotiations between the parties and moves by alternative providers such as Anthropic will shape Cursor’s user experience and competition in the market.
