OpenAI announced late Friday that it will end access to its artificial intelligence models on coding platform Cursor. The decision follows the acquisition of Cursor by Elon Musk’s aerospace giant SpaceX earlier this month, intensifying a long-running dispute between the tech leaders.
OpenAI sets November 2026 cutoff for Cursor
According to CNBC, OpenAI set a proposed shutdown date of Nov. 12, 2026, for its models on the Cursor platform. The artificial intelligence firm stated that it will not offer future models to Cursor as it winds down the current agreement. OpenAI cited past experiences with Musk’s companies violating contracts as the reason for its lack of confidence that SpaceX would abide by its terms of service.
SpaceX completed its acquisition of Cursor on Aug. 14 for $60 billion, according to financial filings cited by CNBC. The rocket company had previously acquired Musk’s social network X and AI firm xAI in February before SpaceX went public in June. This latest corporate move puts Cursor directly under the umbrella of Musk’s expanding empire.
How the change affects developers and traffic
Cursor Chief Executive Officer Michael Truell stated on social platform X that OpenAI models account for roughly 5% of Cursor user traffic. Truell noted that the startup is speaking with OpenAI to resolve the issue, adding that Cursor was one of OpenAI’s earliest partners and had relied on the platform as neutral infrastructure.
Despite the planned termination of OpenAI integration, Cursor users will retain access to alternative model providers. Anthropic co-founder Tom Brown publicly confirmed on X that his company will continue to expand compute capacity to support its Claude models inside Cursor under SpaceX ownership, as reported by CNBC. This comes after Anthropic previously blocked developer access to Windsurf in June after entering a separate compute partnership with SpaceX.
Why Musk and OpenAI are at odds
The decision highlights an escalating feud between Musk and OpenAI executives Sam Altman and Greg Brockman. Musk co-founded OpenAI as a non-profit research initiative in 2015 before stepping down from its board in 2018. He later sued the organization, claiming its transition to a commercial structure violated original commitments, though OpenAI has consistently disputed those allegations.
Following the cutoff announcement, Musk posted critical comments about OpenAI leadership on X, repeating claims that the founders improperly restructured the non-profit venture. Musk lost his initial legal challenge against OpenAI earlier this year but has stated his intention to appeal the court decision. The feud unfolds as both firms race for dominance in AI software development tools, known in the industry as vibe coding tools.
What developers can expect next
The transition period leaves Cursor with more than two years before OpenAI completely revokes access to its existing models. Developers using Cursor can continue leveraging OpenAI features until the Nov. 12, 2026 deadline, though no newly released OpenAI models will be added to the service during this wind-down period.
Developers seeking updates or support regarding platform integrations can consult official resources at cursor.com or monitor developer documentation and terms updates directly on openai.com. As the AI-assisted software development market grows rapidly, competition among rival providers like Anthropic and independent tools like Replit is expected to intensify, especially with Anthropic holding preliminary meetings for a potential initial public offering this year at a valuation reaching up to $2 trillion, according to CNBC reporting.
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