OpenAI launches ChatGPT sign-in for 16 partner tools

What's new

OpenAI has launched a new sign-in feature called "Sign in with ChatGPT," which Sam Altman showed off at the company's developer conference DevDay on September 29, 2026. The feature makes it possible to log in to external apps and websites with your ChatGPT account, and to take your paid plan with you into the other tools. At launch there are 16 partners, including the coding tools Devin from Cognition, Warp, Amp, Kilo Code, OpenCode, OpenClaw, T3 and Dactyl, as well as the productivity tools Notion and Vercel. Lovable is on its way to being connected. Several of the tools have already tested the feature since July along with Airtable, GitLab, HubSpot and Supabase, and two weeks ago it was opened to all users.

What's clever

The clever part is that as a user you no longer have to create a separate API key (a kind of password developers normally use to connect to OpenAI's models) to use ChatGPT inside other programs. You just log in with your existing account, and the app can then draw on your AI usage directly from your subscription. Only your name, email address and profile picture are shared with the connected app; conversations, memory and API keys are not included. You can also set a weekly cap on how much of your plan each app may use. When the cap is reached, access stops, instead of automatically starting to cost extra through the app's own billing.

Cheaper or better?

The feature requires a paid ChatGPT Plus or Pro subscription, so it is not available on the free plan. OpenAI has not announced new prices for the sign-in feature itself, but the advantage is that you can reuse the subscription you already pay for instead of paying separately for AI usage in each individual tool. Whether that actually makes it cheaper than paying for API access directly depends on how much you use the tools. This is not specified exactly in the sources, and no direct comparison with competitors such as Google or Anthropic has been found on this point.

What it's good at

The feature is an obvious fit for people who use several AI tools for coding or productivity in their daily work, for example developers working in Devin, Warp or Vercel, or teams using Notion. Instead of keeping track of multiple subscriptions and API keys, you can consolidate your AI usage in one place and control how much each app may use. This makes it easier for regular users and smaller businesses to try out new AI tools without having to pay extra on top of their existing ChatGPT plan.