OpenAI will cut off AI models to Musk-owned coding tool Cursor

OpenAI has announced plans to terminate its agreement to provide artificial intelligence models to Cursor, the coding tool company recently acquired by Elon Musk's SpaceX, according to Nairametrics. The decision directly escalates the long-running rivalry between Musk and OpenAI CEO Sam Altman, moving their conflict from public statements and lawsuits into commercial territory.

The termination cuts off Cursor's access to OpenAI's models, which have powered core features of the AI-assisted code editor. Cursor has become one of the most widely adopted AI coding tools since its launch, offering developers code completion, generation, and multi-file editing capabilities built on large language models. Its acquisition by SpaceX placed the company squarely under Musk's ownership, creating a direct commercial relationship between OpenAI and a competitor led by its most prominent critic.

Musk co-founded OpenAI in 2015 as a nonprofit research lab but left its board in 2018 following disagreements over the organization's direction. He has since become a persistent antagonist of the company, founding rival AI firm xAI in 2023 and repeatedly challenging OpenAI in public and in court over its shift toward a for-profit structure and its commercial partnerships. The Cursor termination represents one of the clearest instances yet of OpenAI drawing a hard line against doing business with a Musk-controlled entity.

The business stakes are significant for both sides. Cursor has built a large developer user base on the strength of its AI capabilities, and losing access to OpenAI's models could force the tool to shift to alternative providers such as Anthropic's Claude or Google's Gemini, or to models developed by Musk's own xAI. For OpenAI, the decision signals a willingness to forgo revenue from a high-profile customer when ownership and competitive conflicts arise.

OpenAI has not disclosed the specific timeline for the termination, the contractual grounds on which it is acting, or the terms under which Cursor will transition away from its models. Neither SpaceX nor Cursor has issued a public statement detailing the operational impact on the tool's existing user base. The lack of detail leaves unresolved questions about whether existing enterprise contracts will be honored through their current terms or terminated early.

The development also raises broader questions about the commercial relationships between OpenAI and companies within Musk's orbit. Musk controls multiple technology businesses, and the Cursor termination may test whether OpenAI will apply similar scrutiny to other customers with ties to xAI or Musk's broader corporate network. No additional terminations have been announced.

The Musk-Altman conflict has intensified throughout 2024 and 2025. Musk filed a lawsuit against OpenAI in early 2024, later withdrawing and refiling it, claiming the company abandoned its founding nonprofit mission. OpenAI has disputed those claims and pointed to Musk's early support for a for-profit structure. The Cursor decision brings that conflict into a new arena: the everyday tools used by software developers.

More information is expected in the coming weeks as Cursor responds to the termination and reveals its model provider strategy going forward. The full details of the original agreement between OpenAI and Cursor, including its duration and renewal terms, have not been made public.