Head over to ClearCRM AI > Settings.
You’ll see a field labeled OpenAI Secret Key, along with a link to OpenAI’s API Key page:
Click the OpenAI API link, or go to https://platform.openai.com/api-keys.
Log in to your OpenAI account.
Click Create new secret key and copy the key.
Paste it into the OpenAI Secret Key field in ClearCRM.
Click Save.

Adding the key is just one part.
To actually use OpenAI-powered features, your account must also have active usage credits.
There are two options:
If you see free trial credits remaining, you're good!
If your credits are used up or expired:
Choose one:
Add a payment method (for pay-as-you-go)
Or buy prepaid credits

Once your key is saved and billing is active, you’ll be able to use all features in the ClearCRM AI:
AI Chat Box
AI Image Generator
AI Audio Transcription
AI Audio Generation
AI Documents & Templates