How to get an OpenAI API key

VNTranslator can use OpenAI models for translation. To connect, you need a Secret API key from the OpenAI Developer Platform (not from the ChatGPT website).

Important: ChatGPT billing is separate

ChatGPT subscriptions and API usage are billed separately. Manage API billing on platform.openai.com.

Step 1: Sign in to the OpenAI Developer Platform

Open platform.openai.com and sign in.

Step 2: Create a new secret key

Go to the API keys page: platform.openai.com/account/api-keys
Click Create new secret key.
Optionally set permissions for the key.
Copy the key and store it in a password manager. You may only be shown the full key once.

Do not share your key

Anyone with your key can use your quota. Never post it publicly. If leaked, revoke it immediately and create a new one.

Step 3: Set spending controls (recommended)

Enable billing / add a payment method if required.
Set usage alerts or budgets per project.
Start with a small test before large translations.

Use the key in VNTranslator

Open the translator page.
Select an OpenAI model.
Paste the key into the OpenAI API Key field.
Run a short translation test.

Troubleshooting

Problem	What to do
Authentication error	Verify the full key was copied. Revoke and create a new one if needed.
Quota / billing errors	Check billing settings on the API platform and confirm payment method / credits.
Unexpected cost	Use smaller batches, pick a cheaper model, and set budgets/alerts.