An OpenAI API key lets you use models like GPT-4 for translations. You'll need an account, billing set up, and a generated key.

Step 1: Create an OpenAI account

• Go to the OpenAI Platform website.
• Click Sign up to create an account, or log in if you already have one. A regular ChatGPT subscription does not automatically give you API access, they're separate billing systems.

Step 2: Access the API dashboard

• Once logged in, you'll be in the OpenAI Platform dashboard.
• Go to the API keys section in the left sidebar, or directly to platform.openai.com/api-keys.

• Click "+ Create new secret key".
• Give your key a name (optional, but helpful for identifying it later, e.g. "Development Key").
• Select the project if prompted.
• Click Create secret key.
• Save your secret key somewhere safe, you won't be able to view it again.

Step 3: Add the key to Joomla

• Log in to your Joomla backend.
• Go to System > Manage > Plugins and open System - Autolanguage.
• Open the Service & API tab.
• Set Translation Service to OpenAI (ChatGPT).
• Paste your key into the OpenAI API Key field.
  
• Save.
• After saving, select the model you want to use. See OpenAI's pricing page for the cost of each model.