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Getting an OpenAI (ChatGPT) Key

Connecting NorthSignal to OpenAI gives you access to the models that power ChatGPT, including the ultra-fast gpt-5.

What Models Does This Unlock?​

ModelBest ForSpeed
gpt-5General conversation, creative writing, brainstorming⚡ Very fast
gpt-5-miniQuick, lightweight tasks⚡⚡ Fastest

Step 1: Log into the Developer Portal​

Visit the OpenAI developer website. This is different from the regular ChatGPT website.

  1. Go to platform.openai.com
  2. Log in using the same email and password you use for ChatGPT. If you don't have an account, create one (it's free to register).

Step 2: Add Billing Information​

To use the API, you must have a payment method on file. You only pay for what you use, which is typically fractions of a cent per message.

  1. On the left sidebar, click on the Gear Icon (Settings).
  2. Under "Organization," click on Billing.
  3. Click Add payment details and enter a credit card.
  4. Add an initial balance — we recommend $5 to start. This will last most casual users several weeks.

How Much Will It Cost?​

Usage LevelEstimated Monthly Cost
Casual (a few chats/day)$1 – $3
Moderate (daily use, longer conversations)$5 – $10
Heavy (coding, long documents)$10 – $25
tip

OpenAI lets you set spending limits in the Billing settings. Set a monthly cap of $10 if you want to prevent surprise charges.

Step 3: Generate the Key​

  1. On the left sidebar, click the Lock Icon (API Keys).
  2. Click the green button that says Create new secret key.
  3. Give it a name you'll remember, like NorthSignal.
  4. Click Create secret key.

Step 4: Copy the Key​

A popup will appear with a long string of random letters and numbers starting with sk-. This is your API Key.

  1. Click the Copy button next to it.
warning

You will only see this key once. OpenAI will never show it again. If you lose it, you will need to create a new one.

Step 5: Paste it into NorthSignal​

  1. Go back to NorthSignal.
  2. Click the Settings (Gear Icon) in the bottom left corner.
  3. Click the OpenAI tab.
  4. Paste your key into the text box and click Save Settings.

You're all set! You can now chat with OpenAI models through NorthSignal.

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