Cursor Is Done For (OpenAI Was Just the Start)

OpenAI is cutting Cursor off from GPT models on November 12, two weeks after SpaceX bought Cursor for $60 billion. Cursor says OpenAI is only 5% of its traffic. That number hides a much bigger problem. This video covers the full timeline: Cursor's run from $100M to $4B in revenue, the SpaceX acquisition, Musk vs Altman, the distillation theory behind the cutoff, why Anthropic's friendly response should scare Cursor more than OpenAI's exit, and what actually breaks for Cursor users on November 12. Hotter takes in your inbox every Tuesday: https://devsplainers.com/takeouts/ Timestamps 00:00 — OpenAI fires one of its oldest customers 00:37 — Cursor's rap sheet: $100M to $4B, with drama at every step 01:35 — SpaceX buys Cursor, Musk vs Altman reignites 02:35 — The "5% of traffic" defense, and why traffic is not value 03:22 — The distillation problem: why OpenAI really pulled out 03:59 — Anthropic, the Windsurf precedent, and Cursor's biggest risk 05:10 — What breaks on November 12 (BYOK, automations, Codex workaround) 06:06 — Is Cursor done for, and what to do about it What is the OpenAI Cursor cutoff? On August 28, 2026, OpenAI announced it will remove GPT models from Cursor's built-in model picker on November 12, citing SpaceX's acquisition of Cursor and terms-of-service concerns. Bringing your own OpenAI API key still works in the local chat and agent panels, but cloud agents and automations that route to GPT through Cursor will stop. The common workaround is running OpenAI's Codex extension inside Cursor. Many devs are also weighing Cursor alternatives like Claude Code and Codex directly. In this video: • Why OpenAI cut off Cursor after funding it twice • The SpaceX Cursor acquisition ($60B, closed August 14) • Cursor's 5% traffic claim, examined • AI model distillation, and why Cursor's data is the prize • How Anthropic cut off Windsurf, and why Cursor could be next • Cursor BYOK after November 12: what survives and what fails • Cursor alternatives and how to make your setup portable Sources • OpenAI blog: "Our decision on Cursor following its acquisition by SpaceX" (Aug 28, 2026) • Cursor: "Cursor is now a part of SpaceX" + SpaceX SEC 8-K • Michael Truell on X, the 5% claim (Aug 29, 2026) • Elon Musk on X, responses (Aug 29, 2026) • The Information: Musk's Cursor all-hands remarks • Forbes: Musk testimony on xAI distilling OpenAI models (Apr 30, 2026) • Ars Technica: Cursor's AI support bot incident (Apr 21, 2025) • TechCrunch: Anthropic cuts Windsurf's Claude access (Jun 5, 2025) • CNBC: Windsurf deal collapse and Google hire (Jul 11–14, 2025) #Cursor #OpenAI #SpaceX #AICoding