OpenAI Is Leaving Cursor. I'm Fine With That.

I read OpenAI’s post about Cursor recently. Glad I already picked a default model and stopped treating the picker like a buffet.

OpenAI says it will wind down the contract that puts its models inside Cursor. Shutoff date: November 12, 2026. That’s the longest notice their deal allows. The stated reason is not “Cursor got worse.” It’s SpaceX acquired Cursor, and OpenAI does not trust Elon Musk’s companies to honor terms of service. They point at Twitter/X breaking contracts after the takeover and xAI violating OpenAI’s ToS, which Musk admitted under oath earlier this year.

I use Cursor to code - Hugo layouts, templates, scripts on this site. I’m not cheering for anyone’s lawyers. I’m also not panicking. OpenAI gave Cursor until November 12. That is enough runway for Cursor to line up replacements before the menu shrinks.

Composer 2.5 is the model I reach for. The limits on Cursor’s own bucket are generous enough that I rarely touch anything else. If OpenAI models vanish from the menu, my coding workflow probably does not change much.

What OpenAI Actually Said

Short version, from their side:

• Cursor has had OpenAI models for about four years.
• The custom contract includes a change-of-control exit. SpaceX buying in triggered it.
• OpenAI is holding the cutoff to the latest date the contract allows.
• They are not promising future models. They name Astra as the upcoming one they want tighter control over.
• They say they still respect Cursor’s team and product.

Fair. Also very corporate. The post spends more words on Musk and contract history than on what developers should do on November 13.

That gap is the story for me.

A Short History of Musk vs OpenAI

The Cursor notice did not come out of nowhere. Musk and OpenAI have been fighting in public for years.

2015: Musk helps launch OpenAI as a nonprofit research lab. The pitch: safe AI for everyone, not locked inside one company.

2018: Musk wants more control - a majority stake or folding OpenAI into Tesla. The other founders, including Sam Altman, say no. Musk leaves the board in February. OpenAI later adds a capped-profit arm so it can raise real money.

2022-2023: ChatGPT blows up. OpenAI becomes the name everyone knows. Musk starts xAI in July 2023 - his own AI shop and a direct rival.

2024: Musk sues OpenAI, saying they broke the founding promise by chasing profit and tying up with Microsoft. He drops a state case, then re-files in federal court. The fight spreads: injunctions, countersuits, antitrust claims, nonprofit-to-for-profit drama.

2025: A judge calls Musk’s “irreparable harm” claim a stretch and denies an injunction. OpenAI countersues, saying Musk is trying to slow a competitor. In October 2025, OpenAI closes a for-profit recap (OpenAI Group PBC) while the original nonprofit keeps a stake.

May 2026: A federal jury in Oakland rules Musk waited too long to sue. OpenAI wins. Musk says he will appeal.

Through all of it, Musk keeps posting, suing, and building xAI. OpenAI keeps shipping models and lawyering up. Neither side acts like the other is a neutral partner.

That is the backdrop when SpaceX buys Cursor and OpenAI emails developers about terms of service.

This Reads Like a Proxy War

OpenAI frames the move as safety and terms of service at scale. Maybe. After the timeline above, it still lands like business conflict dressed as principle.

SpaceX now owns X, xAI, and Cursor. The Cursor notice fits the same lane: hurt a Musk-linked product without naming Cursor as the enemy.

I’m a developer, not a party to that feud. When a vendor email opens with “we care deeply about developers,” I read the rest carefully. When it closes by blaming another billionaire’s portfolio, I notice who gets left holding the bag.

The people who liked GPT inside Cursor did not acquire SpaceX. They just picked a model in a dropdown.

If the real worry is misuse of Astra, say that plainly and offer a path for Cursor users who are not SpaceX. They did not. They picked the nuclear option the contract already allowed.

Why I Stay on Composer 2.5

I did not come to Cursor for GPT-4 branding. I came for an agent that reads the repo, proposes diffs, and lets me reject bad patches before they land.

Composer 2.5 is the first model that made that coding loop feel reliable. Not perfect. Sufficient. I stopped opening the model menu every session hunting for a smarter option that might hallucinate less on the next file.

Cursor’s usage limits help too. On Pro I watch one main bucket (Cursor Models, which includes Composer) and keep on-demand spend off.

I am not starving for tokens on the model I already use.

What I want next is simple: Composer 3 at the same rates as Composer 2.5. Not a new tier. Not a surprise quota squeeze. Just a better default in the bucket I already pay for.

So OpenAI’s exit is less “my IDE is broken” and more “one tab in the picker goes gray.” I might not notice for a week.

I Would Not Miss OpenAI Models in Cursor

Honest take: if GPT-family models disappear from Cursor tomorrow, I would shrug.

It reminds me of Disney and other studios pulling their shows off Netflix. Big headline. Lots of angry threads. I did not care. I do not live on Netflix. YouTube is enough for what I actually watch.

Same shape here. OpenAI taking its models out of Cursor is a licensing fight, not a coding emergency.

Composer is my YouTube - the model I already use daily inside the IDE. I might still switch to GPT in Cursor for a second opinion on a tricky diff. I do not depend on it. I do not use AI for much outside coding anyway. This fight is about which models sit in the editor, not whether I use AI at all.

OpenAI still wins plenty of general chat apps. I am not writing this from one of them. Inside an IDE, the integration matters more than the logo on the weights. Cursor’s post-training on Composer is the product. A raw GPT slot in the same sidebar was never the reason I paid.

Why I Will Not Use Claude for Personal Projects

I will not use Claude for personal coding projects. That is a hard line for me - not a ban on AI everywhere.

Personal means repos I own for my own work - jorap.com, my notes garden, Hugo layouts, scripts on this site, side projects I maintain myself. Not in Cursor for that code. Not in another coding assistant. Not for commits on personal repos.

At work, Claude is fine. The company pays for tokens there. AI is still helpful on client code. I just need to learn to spend their tokens wisely - not spray prompts on every small question.

Digital watermarking is why I draw the line at home. Anthropic has talked about marking AI-generated text so systems can detect it later. I do not want that fingerprint on source files I keep long-term. Maybe the risk is overstated. Maybe it only applies to certain outputs. For my personal code, I still walk away.

So when OpenAI models leave the Cursor picker, Claude is not my personal backup. One less third-party slot is not a loss for the repos I own myself.

I use AI heavily for coding on personal projects. I just keep it inside Cursor, mostly on Composer. SpaceX and OpenAI can fight over the rest.

What Happens After November 12

I am not planning a migration drama. Cursor has until November 12 to land replacements - new partners, more Composer capacity, whatever fills the OpenAI gap. That is enough time. I am not worried the picker goes empty on day one.

1. Keep Composer 2.5 as default until Composer 3 lands at the same rates.
2. Ignore the model picker unless a task fails twice. Same rule I use now.
3. Watch whether limits change if demand piles onto fewer providers. That is the real user-facing risk, not “I lost GPT-5.”

If you live inside OpenAI models in Cursor, this hurts more. Fair. My stack is narrow on purpose.

Still on Composer

Big AI vendors are consolidating and feuding. Cursor sits in the crossfire because SpaceX bought it. OpenAI’s post is polite. The move still feels like using developers as leverage in a fight that is not ours.

I’m glad Composer 2.5 and generous limits were already enough before the headline dropped.

Composer 3 at the same price is the upgrade I am actually waiting for. If the picker shrinks, I will keep coding the same way. I’m glad the IDE won me on workflow, not on whose API key is plugged in behind the curtain.