English

AcquisitionsOpenAICursor

OpenAI Proposes Terminating Model Provision to Cursor, Citing "Trust" Following SpaceX Acquisition

This article is a translation. Read the Japanese original

U.S.-based OpenAI has revealed its intention to end the provision of its models to the AI coding tool "Cursor" on November 12, 2026. OpenAI announced that it has notified Anysphere, the developer of Cursor, of its intent to terminate the contract following Anysphere's acquisition by SpaceX.

OpenAI stated that it cannot be certain that SpaceX will continue to use its technology within the scope of the terms of service. The company cited past instances where another company led by Elon Musk violated contractual terms as the underlying reason. OpenAI explained that the contract with Cursor includes a clause allowing for termination following a change in control (acquisition), and that it has provided the longest possible notice period allowed under the contract to ensure developers have maximum time for migration. Furthermore, regarding the next-generation model "Astra," OpenAI plans not to provide it to Cursor due to the necessity of ensuring usage complies with its terms of service.

Michael Truell, CEO of Anysphere, the developer of Cursor, stated that OpenAI's models account for only approximately 5% of Cursor's user traffic and said that they are continuing discussions with the OpenAI team to resolve the issue. He expressed bewilderment at the sudden policy shift, noting that Cursor has been a user of OpenAI since its earliest stages and has trusted the company's platform as a neutral infrastructure.

On the other hand, Anthropic co-founder Tom Brown emphasized that Cursor is a reliable partner for their Claude models. He stated that they will increase computational resources to strengthen support for Claude models within Cursor, expressing commitment to continued provision and enhanced cooperation.

Sources

  1. 「中立的なインフラだと信じていた」——OpenAIがCursorへのモデル提供を止めた理由 - shiritomo (Google News: Cursor、2026-08-30)
  2. OpenAI、Cursorへのモデル提供を11月12日に終了 SpaceXによる買収が理由 (ITmedia AI+、2026-08-29)
2 more sourcesHide sources
  1. OpenAIがCursorとの提携・モデル提供の終了を通達、「SpaceXがOpenAIの利用規約に従って技術を使うという確信が持てないため」 (GIGAZINE、2026-08-29)
  2. Our decision on Cursor following its acquisition by SpaceX(HN 839pt・530コメント) (HN Search (backfill)、2026-08-29)