# OpenAI and Cursor partnership termination

> Live situation record from CLSTR: https://clstr.news/situations/openai-and-cursor-partnership-termination
> Updated: 2026-08-29T14:39:28.000Z. Sources: 79. Developments: 2.

OpenAI announced it will terminate its partnership with the AI coding tool Cursor, effective November 12, 2026. This decision follows SpaceX’s $60 billion acquisition of Cursor’s developer, Anysphere, in mid-August.

OpenAI invoked a change-of-control clause, stating it cannot be confident that SpaceX will adhere to its terms of service. The company specifically cited a history of contractual non-compliance by Elon Musk’s other entities, such as X and xAI. OpenAI also noted that future models, including the upcoming Astra, will not be provided to the platform.

Elon Musk dismissed the decision on X, labeling Sam Altman and Greg Brockman as “untrustworthy.” While Cursor co-founder Michael Truell noted that OpenAI models currently account for approximately 5% of Cursor’s AI traffic, he indicated the company is in discussions with OpenAI to resolve the matter.

In response to the potential disruption, Anthropic has announced plans to expand its computing resources to increase the availability of its Claude models within the Cursor platform. Developers may still access OpenAI models via personal API keys or IDE extensions.

## Claims

- OpenAI plans to terminate its model supply agreement with Cursor by November 12, 2026. (corroborated by 22 sources)
- OpenAI cited past contract violations by Elon Musk's companies, specifically X, as the reason for the decision. (corroborated by 20 sources)
- SpaceX recently completed a $60 billion acquisition of Anysphere, the developer of Cursor. (corroborated by 12 sources)
- OpenAI models currently account for approximately 5% of Cursor's user traffic. (corroborated by 11 sources)
- Elon Musk dismissed the decision, calling Sam Altman and Greg Brockman untrustworthy. (corroborated by 11 sources)
- Anthropic plans to increase computing resources to provide its Claude models to Cursor. (corroborated by 6 sources)
- OpenAI will not provide any new models to Cursor during the notice period, including the upcoming Astra model. (corroborated by 2 sources)

## Timeline

### 2026-08-29: OpenAI to end model supply for Cursor following SpaceX acquisition

OpenAI plans to end its model supply to the Cursor coding tool by November 12, 2026, following SpaceX’s acquisition of Cursor’s parent company, citing concerns over contract compliance.

29 sources. https://clstr.news/cluster/openai-to-end-cursor-partnership-following-spacex-acquisition

### 2026-08-27: OpenAI to terminate Cursor access following SpaceX acquisition

OpenAI will end its partnership with the Cursor AI coding tool on November 12, 2026, following SpaceX's acquisition of Cursor's developer, citing concerns over contractual compliance.

50 sources. https://clstr.news/cluster/russian-speaking-hackers-use-spacexs-cursor-ai-to-breach-multiple-companies

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Cite as: OpenAI and Cursor partnership termination. CLSTR, https://clstr.news/situations/openai-and-cursor-partnership-termination