OpenAI Will Cut Off Cursor After SpaceX’s $60 Billion Close, Effective November 12
On August 28, 2026, OpenAI said it will stop serving Cursor after SpaceX’s acquisition of Anysphere closes, with a proposed November 12 cutoff. Cursor CEO Michael Truell said OpenAI is about 5% of Cursor traffic; Anthropic’s Tom Brown said Claude compute will fill the gap.
TLDR
OpenAI on Friday, August 28, 2026 published “Our decision on Cursor following its acquisition by SpaceX.” Once SpaceX closes the Anysphere / Cursor deal—reported at ~$60 billion—OpenAI will stop providing models and API access to Cursor. Proposed cutoff: November 12, 2026. Michael Truell (Cursor) told reporters OpenAI is about 5% of Cursor traffic. Tom Brown (Anthropic) said Anthropic will add Claude compute. OpenAI’s X post landed 01:46 UTC Saturday (Friday evening PT); wires ran Saturday. File on the OpenAI index date (28), not the Saturday amplification.
What OpenAI is doing
| Item | openai.com/index Aug 28 |
|---|---|
| Trigger | SpaceX acquisition of Cursor / Anysphere |
| Action | End model/API service to Cursor |
| Date | Proposed Nov 12, 2026 |
| Stated reason | Competitor-lab control of a major coding client |
This is distribution politics, not a new model. Grok is already in GitHub Copilot (Aug 14) and Cursor is SpaceXAI’s coding surface.
Product-line de-dupe: not Grok 4.6 (12), not Grok Bot seats (21), not Foundry (26). The cutoff is the news.
Why this story matters
Frontier labs are unbundling each other’s IDEs. A 5% traffic cut is survivable; a precedent that acquiring a coding client means losing OpenAI weights is not. Watch: whether Nov 12 slips, and whether Microsoft keeps Grok in Copilot while OpenAI walks out of Cursor.
Sources
- OpenAI: Our decision on Cursor following its acquisition by SpaceX (August 28, 2026)
- Reuters / CNBC / Business Insider Saturday coverage of the Friday post