OpenAI just told one of the most popular coding tools in the world it's cutting off access. The reason is Elon Musk.
OpenAI notified SpaceX this week that it intends to wind down the contract letting Cursor use OpenAI's models. The proposed shutoff date is November 12, 2026.
Why OpenAI Says It Doesn't Trust SpaceX
OpenAI is giving Cursor developer Anysphere the maximum notice its contract allows. But the underlying reason is blunt.
"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," OpenAI wrote in a blog post.
OpenAI pointed to specifics. After Musk acquired Twitter, the company broke the terms of OpenAI's contract, among others.
Musk also admitted under oath earlier this year that xAI, now also part of SpaceX, had violated OpenAI's terms of service.
A Tool Half of Developers Now Rely On
The stakes here are bigger than one contract dispute. Cursor has grown from a $400 million valuation in 2024 to more than $29 billion in early 2026.
Claude Code and Cursor together now account for more than half of developers' primary AI coding tool choices. That's according to a 2026 Digital Applied survey of 2,847 developers.
OpenAI says it worked with Cursor for nearly four years and wants to support affected developers through the transition. Whether that's enough won't be clear until closer to November.
Miami's Builder Community Is Already Talking About It
Cursor's momentum shows up directly in Miami's own developer scene. AI Tinkerers Miami is part of a 247 city global network of hands-on AI builders. It runs regular meetups where local engineers demo projects built with tools like Cursor.
Miami based tech writer James Weiss covers startup tooling for Under30CEO. He's been tracking Cursor's product expansion closely, including its recent move into code hosting with a tool called Origin.
For a founder deciding what their engineering team builds on, a fight over who controls model access isn't background noise. It's the kind of decision that can reshape a roadmap with three months' notice.
What Developers Should Actually Watch
OpenAI's decision doesn't kill Cursor. Anysphere already builds on models from Anthropic and Google alongside OpenAI's.
But it does signal something Miami's growing developer community should take seriously. Even the most popular AI coding tool in the world isn't fully in control of which models it can offer.