OpenAI said on its OpenAI Developers account on X on 10 November that ChatGPT Business plans can now be connected to other companies’ tools through Sign in with ChatGPT. The update names Notion, v0, Amp, Kilo Code, Warp, Hermes from Nous Research, OpenClaw and OpenCode, ‘and more’. Nous Research said the same day on its own account that sign-in to its Nous Portal service now supports Business plans.

Signing in and using the plan are separate permissions

With Sign in with ChatGPT, users sign in to an app with their ChatGPT account. The app then receives the user’s name, email address and profile picture. Users can also separately allow the app’s AI requests to draw on their ChatGPT plan’s usage limit. They do not need to create or share an OpenAI API key.

OpenAI’s help page says the requests use the ChatGPT Work and Codex usage or credits included in the plan. Connecting an app does not raise the limit, and the app may charge separately for its own services. Some ChatGPT or OpenAI API features may not be available in other apps. Using the plan does not give the app access to ChatGPT conversations or memories, OpenAI said.

Among personal plans, the feature is available on Go, Plus and Pro. Availability also depends on which of its own plans the app offers the feature on.

Admins decide on apps and caps

In a Business workspace, the organisation must allow plan usage for each app separately. Permission to sign in does not in itself mean permission to use the plan.

Admins can also cap the percentage of each Standard or Premium member’s included usage that approved services may consume in total. The cap does not give apps their own usage limits. Once the cap is reached, members with permission can continue on workspace credits. Members billed by usage use credits only. Members can set their own per-app caps, but these do not override the organisation’s settings.

OpenAI’s partner list includes 12 apps that support plan usage, one of which, Lovable, is still to come. The list says Devin does not support plan usage on Business plans. The open-source integrations are OpenClaw, OpenCode, Pi and T3. The help page says the supported open-source tools remain available to all ChatGPT users.

Admins allow an app in the Admin Console under Tenant settings > External access and set the percentage cap in the workspace’s Usage limits settings. Members choose the correct Business workspace when signing in. Detailed instructions are in OpenAI’s Help Center.