On November 10, OpenAI Developers announced that ChatGPT Business users can now use their plan in third-party tools such as Notion, v0, Amp, Kilo Code, Warp, Hermes from Nous Research, OpenClaw, and OpenCode through Sign in with ChatGPT. Until now this mainly applied to personal Go, Plus, and Pro plans. Usage counts against the plan's existing Codex / ChatGPT work allowance and adds no new quota. Business admins must allow each app at admin.openai.com and can cap what share of each member's allowance outside tools may use.
Key Takeaways
- ✓Scope: Go, Plus, Pro, and Business subscribers can use their plan in supported apps, with Business newly added; signing in and using your plan are separate permissions (official docs)
- ✓The plan-usage list has 12 apps (including Lovable, coming soon), such as Amp Code, Conductor, Devin, Hermes Agent, Kilo Code, Notion, Vercel, and Warp; 4 open-source integrations are listed: OpenClaw, OpenCode, Pi, and T3
- ✓Exceptions: Devin does not support ChatGPT Business plan usage, and 5 apps, including Airtable, Canva, GitLab, HubSpot, and Supabase, offer sign-in only without plan usage
- ✓Admin controls: set each app to Allowed under Tenant settings > External access at admin.openai.com, then set the share of each member's allowance outside services can use under Usage limits (the docs example is 25%); users can also set weekly per-app caps in 10% steps
- ✓Privacy: using your plan does not give the app access to ChatGPT conversations or memories; connecting adds no allowance, and the app may charge its own fees
Key Decision Metrics at a Glance
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Project Links & Resources
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Core Background and Industry Pain Points
Many teams already pay for ChatGPT Business, but using GPT models in tools like Notion, Warp, Amp, or OpenCode still meant a separate API key or another subscription, with two sets of bills and admin work. In September OpenAI tightened the rules for third-party clients using Sign in with ChatGPT to access Codex, limiting it to partners and open-source projects, and in October tools such as Devin began accepting personal Go, Plus, and Pro plans. On November 10, OpenAI Developers announced that Business plans can be used the same way.
Architecture Highlights and Underlying Mechanisms
Sign in with ChatGPT separates signing in from using your plan. An app first asks for identity details such as name and email, then separately asks for the Use your ChatGPT plan permission. Once allowed, the app's AI requests count against the plan's Codex / ChatGPT work allowance, add no new quota, and do not give the app access to conversations or memories. Business adds an admin layer: admins allow each app under External access at admin.openai.com, then set what share of each member's allowance outside services may use under Usage limits, and members with permission can draw on workspace credits after hitting that cap.
Authoritative Benchmarks and Measured Comparisons
This is an account and billing update, not a model release, so there are no benchmarks, and OpenAI has not said how speed or usage differs across apps. The docs show a Fast option that uses your plan or credits faster, but the exact multiplier has not been published. To see which tool uses less of your allowance, watch Settings > Usage in ChatGPT.
Developer Adoption and Getting Started
Business admins should first decide which tools to allow and start with a low share for outside services (the docs example is 25%), so a coding agent does not use up a member's whole weekly allowance. Members pick Continue with ChatGPT in a supported app and approve the plan permission; they can set weekly per-app caps in Settings > Usage and disconnect anytime under Security and login. Note that Devin does not support Business plan usage yet. Developers who want to integrate can start with OpenAI's Sign in with ChatGPT developer documentation.
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