OpenAI severs contract with Cursor after SpaceX acquisition, citing Musk's history of breaking contracts

OpenAI has confirmed it is terminating its contract with Cursor, an AI-powered coding assistant, after the company was acquired by SpaceX. In a brief statement, OpenAI said it made the decision to wind down the contract "following its acquisition by SpaceX."

The Decoder reported that OpenAI cited Elon Musk's history of breaking contracts as the rationale behind the cutoff. The move comes amid ongoing tensions between Musk and OpenAI, which Musk co-founded before leaving the board and later suing.

Cursor co-founder Michael Truell downplayed the impact of the decision, telling The Decoder that OpenAI models account for just five percent of the tool's AI traffic. The company likely relies on other large language models for the majority of its functionality.

The acquisition of Cursor by SpaceX was announced earlier this year, and the deal closed recently. Neither OpenAI nor SpaceX has publicly commented on the specifics of the contract termination beyond OpenAI's statement.

Why This Matters

The decision signals an escalation in the rivalry between Elon Musk and OpenAI, which could affect other companies that cross the two.
Cursor users may experience a change in model quality if the tool's remaining models cannot fully replicate OpenAI's capabilities, though the company claims minimal impact.
The move raises questions about the enforceability of contracts when ownership changes to a competitor or adversary.

Background

OpenAI and Elon Musk have a long and contentious history. Musk was a co-founder of OpenAI but left the board in 2018, later criticising the company's shift to a for-profit model. He has since sued OpenAI, alleging it abandoned its original nonprofit mission. Musk also started his own AI company, xAI, which competes directly with OpenAI. Cursor is a popular AI coding assistant that has grown rapidly among developers. Its acquisition by SpaceX—a company Musk controls—placed it squarely in the crosshairs of the OpenAI-Musk feud.

Key Perspectives

OpenAI: The company argues that Musk's history of breaking contracts makes it untenable to continue providing models to an entity he controls. OpenAI likely wants to protect its intellectual property and prevent a competitor from gaining leverage. Cursor: The co-founder downplays the impact, stating that only 5% of Cursor's AI traffic comes from OpenAI models. This suggests Cursor can pivot to alternative models, such as those from Anthropic, Google, or open-source options, without significant disruption. Critics/Skeptics: Some may view the move as anti-competitive or retaliatory, given that Musk's xAI is a direct competitor. Critics could argue that OpenAI is using its dominant position to restrict access to a tool that developers rely on, potentially harming users.

What to Watch

Whether Cursor releases a statement confirming its reliance on other models and any changes to user experience.
Possible legal action from SpaceX or Musk challenging the contract termination.
How other AI providers (e.g., Anthropic, Google) respond to any increased demand from Cursor.

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