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Sam Altman vs Elon Musk: Why OpenAI ended partnership with Cursor after SpaceX acquisition – Explained

OpenAI, the leading Artificial intelligence company, on Friday announced that it will end its partnership with Cursor. This development followed SpaceX acquisition of the AI-coding agent, signaling further escalation of the bitter rivalry between OpenAI CEO Sam Altman and SpaceX founder Elon Musk. The ChatGPT maker blamed trust issues for winding down their contract and […]

By deepak · August 29, 2026 · 4 min read

OpenAI, the leading Artificial intelligence company, on Friday announced that it will end its partnership with Cursor. This development followed SpaceX acquisition of the AI-coding agent, signaling further escalation of the bitter rivalry between OpenAI CEO Sam Altman and SpaceX founder Elon Musk. The ChatGPT maker blamed trust issues for winding down their contract and said that it was not confident that SpaceX would use its technology “within our terms of service.”

With a proposed shutoff date of 12 November, Cursor received 76 days of notice following which its direct model access will be withdrawn. The deal between Elon Musk's SpaceX and the coding-tool company triggered a contract clause allowing OpenAI to withdraw its models.

OpenAI in a statement issued on 28 August (local time) said, “Today, we notified SpaceX that we intend to wind down our contract providing OpenAI models to Cursor, with a proposed shutoff date of November 12, 2026. To maximize the time that developers can retain access to our models through Cursor, we are giving the maximum notice provided by our contract. This decision was incredibly tough, as we care deeply about our models being broadly available for developers. We are making this choice because we cannot be confident that SpaceX will use our technology within our terms of service, based on our experience with Elon Musk's companies violating contracts.”

This major decision was taken while taking into account past instances where Elon Musk's xAI violated OpenAI’s terms of service. Musk and Altman's longstanding feud dates back to trial after the Tesla chief sued OpenAI for $150 billion, accusing the company and Altman of “stealing a charity”.

OpenAI in its note stated, “To work with a large partner like SpaceX, we typically rely on custom contracts to ensure compliance with our terms of service and that the integration provides for safety at scale. After Musk acquired Twitter, now part of SpaceX, the company broke⁠(opens in a new window) the terms of our contract (alongside many others). Under oath earlier this year, Musk admitted⁠(opens in a new window) that xAI, now also part of SpaceX, had violated OpenAI’s terms of service (terms which are similar to xAI’s own).”

The coding-tool company now owned by Elon Musk's SpaceX will no longer receive any of OpenAI’s future model contracts. OpenAI acknowledged their 4-year relationship with Cursor and at the same time stressed that this move will adversely impact “developers who rely on OpenAI models in Cursor”. It further noted that the company tried to “hold the contract cancellation to the latest date.”

However, Cursor co-founder Michael Truell, who is now an executive at SpaceX, said that they were in talks with the OpenAI team to resolve the issue, Reuters reported. Shortly after OpenAI's public announcement, Michael Truell in a post on X wrote, “Cursor was one of the very first users of OpenAI, we’ve worked closely with their team for years, and we’ve trusted their platform to be neutral infrastructure for our business.”

In June, SpaceX announced an all-stock deal to take over Anysphere, the startup behind Cursor, for $60 billion. The acquisition was completed earlier this month.

Fareha Naaz is a Delhi-based journalist and Content Producer at LiveMint, where she has built nearly three years of experience in digital journalism. She covers a diverse range of topics, including national news, education, entertainment, lifestyle trends science, global health and international news.<br><br>
With a background in Economics and Education, she focuses on providing insightful, thoroughly researched coverage that bridges the gap between breaking news and in-depth analysis. In addition to breaking copies, legal and political news, her reporting blends editorial rigour with search-driven storytelling. With a keen eye-on-global events, she provides insightful coverage on latest developments. Her reporting combines editorial rigour with in-depth coverage and search-driven storytelling provide valuable insight and context to readers, ensuring accuracy and relevance.<br><br>
Her newsroom experience helped her in combining her critical thinking skills with real-time editorial decision-making. Over the years, she has been presenting complex stories with clarity for a digital-first audience amid fast-paced news cycles. Her thoroughly researched stories, with well-structured and engaging content, provide readers with clear understanding of the context and background.<br><br>
Fareha holds a Master’s degree in Economics, in addition to a Bachelor of Education degree.<br><br>
When not in the newsroom, she enjoys painting and sports, reading books and current developments.

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Source: Read the original article on www.livemint.com