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Your ChatGPT Plus or Pro plan now pays for OpenAI models inside Devin and other apps

The catch is that a coding agent in someone else's app now spends the same quota you'd use in Codex.

By Think Facility · October 1, 2026 · OpenAI ChatGPT Save

On October 1, 2026, Sam Altman posted that people should be able to take their AI subscription wherever they need it. He was pointing at something OpenAI had switched on two days earlier: a ChatGPT Plus or Pro plan can now pay for the OpenAI model use inside other companies' apps.

It runs through Sign in with ChatGPT, a login button partner apps can show. Sign in, approve a second request to share your plan, and the app's OpenAI requests count against the allowance you already pay for. No API key, and no separate bill from OpenAI.

Who

Eligible Plus and Pro users

Partners

over 60 partners products

Usage

counts toward your existing plan allowance

Controls

an app-specific limit

Status

a limited preview

What you're agreeing to

OpenAI's release notes for ChatGPT set out the deal plainly.

So it isn't extra usage. I'd set that cap before connecting anything, since a coding agent left running in some other app eats the same quota you'd otherwise spend in Codex. The notes add that using purchased credits needs its own opt-in, and that a partner may still charge for its own product.

Logging in and sharing your plan are two separate approvals. For the login alone, OpenAI's help page says the app gets your name, email address and profile picture. Sharing your plan (the help page calls it subscription sharing) doesn't hand over your chats either.

Who's in

The help page names six first partners for the login itself: Airtable, GitLab, HubSpot, Notion, Supabase and Vercel. Plan sharing is a different list, and a much longer one. Thibault Sottiaux, who works on Codex and ChatGPT at OpenAI, put the count at over 60 on launch day, with Devin and OpenCode among them.

Cognition, which makes the Devin coding agent, went live within 20 minutes of that post. Its version covers every way you'd run Devin.

The fine print for developers

OpenAI's developer docs open plan sharing to open-source and locally hosted apps. A paid or remotely hosted app has to fill in an interest form first. The preview also strips out a lot of the API: image generation, file search, Code Interpreter and hosted connectors aren't supported on this route.

Business and Enterprise users get the login by default unless their organization has set its own identity policy, according to the help page. The plan sharing described in the release notes is for Plus and Pro.

Altman's own post added no detail. It's a pitch, and it came two days after the switch.

Don't see the option in an app you use? OpenAI's help page says the app may not support it yet, or it may not have reached your account. At work, an admin policy can also block it.