OpenAI pulls model access from Cursor after SpaceX acquisition

OpenAI announced Thursday that it will terminate its contract supplying AI models to Cursor, the popular AI coding assistant, effective November 12, 2026 — giving the maximum notice period allowed under its agreement. The move follows SpaceX's $60 billion acquisition of Anysphere, Cursor's parent company, which closed on August 14.

In an official statement, OpenAI said it cannot be confident that SpaceX will use its technology within its terms of service, citing a pattern of violations by Elon Musk's companies. After Musk acquired Twitter (now part of SpaceX), the company broke the terms of its prior OpenAI contract. More recently, Musk admitted under oath that xAI — also now absorbed into SpaceX — had violated OpenAI's terms of service, terms that mirror xAI's own policies.

What this means for Cursor users

Cursor has built a loyal following among software developers for its deep AI-powered code completion, multi-file editing, and codebase understanding. It currently supports OpenAI models including GPT-4o and the upcoming Astra model. As of November 12, developers relying on OpenAI models within Cursor will need to migrate to alternative providers or use SpaceXAI's own Grok models, which power Cursor's backend post-acquisition.

OpenAI emphasized it will "go above and beyond" to support affected developers during the transition. The company said it cares deeply about broad model availability and called the decision "incredibly tough" — but maintained it has a new level of accountability to ensure its next-generation models are deployed safely and within its terms.

A rivalry with high stakes

The fallout is the latest escalation in the long-running conflict between Sam Altman and Elon Musk. SpaceX acquired Cursor — which had grown into one of the most used AI coding tools — in an all-stock deal in mid-August, instantly integrating it into SpaceXAI's growing product portfolio alongside Grok. The acquisition gave Musk's company a significant foothold in the developer tools market, where OpenAI's own Codex and GitHub Copilot (which also uses OpenAI models) compete directly.

By pulling model access, OpenAI removes a key ingredient from SpaceX's newly acquired developer platform. It also signals that future OpenAI partnerships — especially those involving sensitive or powerful models like Astra — will come with stricter governance requirements, including custom contracts that survive ownership changes.

The move is likely to accelerate SpaceX's push to build out Grok's coding capabilities as a direct replacement, and will test whether Cursor's community stays loyal through the transition or migrates to other tools, as first reported by OpenAI's own blog.