Connect OpenAI / a ChatGPT subscription

Two ways: sign in with the ChatGPT subscription you already pay for, or create an API key at platform.openai.com and pay per use. The two are billed separately — if you already pay for ChatGPT you don't need to buy API credit.

Third-party tools signing in with a subscription are not explicitly authorised by OpenAI / Anthropic and may be rate-limited or banned; the account belongs to you alone — don't sign in on a shared company machine. The card always shows this.

Only available on the personal setup (the service runs on your own computer); on a shared company deployment the option is greyed out with the reason.

Make sure your ChatGPT account is Plus or Pro (the free tier can't do this).
On the "OpenAI / ChatGPT" card choose "Sign in with ChatGPT" and click "Sign in with a device code" — you get a URL and a code.
Open the URL on your phone or another computer, enter the code and approve.
The page switches to "Signed in" by itself; pick a model. The token renews itself before it expires.
Click "Sign out" to leave: the authorisation on this computer is destroyed at once and you'll need to sign in again.

Option 2: API key (pay as you go)

Create a key at platform.openai.com and pay per token.

Open OpenAI API keys and sign in.
Create a key and copy it (shown only once).
Choose "API key" on the card, click "Add API key", paste it and keep the prefilled address (https://api.openai.com/v1).
Click "Fetch model list" and pick a model (one that can read images).
Click "Test".

The API key only goes into this computer's encrypted store: never through AI, never into logs.