GPT-3 is a neural network model created by OpenAI that generates text. It is trained on a large corpus of text and can generate text in response to a prompt.

Account creation

To use OpenAI through API, you must create a free account and generate keys. Fortunately, it is pretty straightforward.

1. Sign up here https://beta.openai.com/signup. You can use your Google or Microsoft account to sign up if you don't want to create using an email/password combination. You may need a valid mobile number to verify your account.

2. Now, visit your OpenAI key page https://beta.openai.com/account/api-keys or click the menu item "View API keys"

3. Create a new key by clicking the "Create new secret key" button. See the image for reference.

That's all. You can use this key in your applications. 

Remember, the key created has access to both GPT-4 and ChatGPT models. You don't need separate API keys.

Cost

Please note that you will be charged based on your monthly usage. The cost structure is as follows: 750 words (aka 1000 tokens). Below is a table representing the cost per 1000 tokens:

Model                                 Cost

GPT-4 (8k Context)        $0.03

GPT-4 (32k Context)      $0.06

GPT-3 (Davinci)               $0.02

GPT-3.5 Turbo                 $0.002 (10x cheaper than GPT-3)

Whisper (Audio).             $0.006 / minute

For example, if you use 2500 tokens per day of GPT-3 Davinci for 20 days a month, you will be charged $1 per month, i.e. 0.02 * 2.5 * 20.

Setting limits

OpenAI gives $18 free credits, which you can consume within the first 3 months. This is a great way to test the service.

If you plan to use it regularly, you need to add your credit card information here https://beta.openai.com/account/billing/payment-methods​

Otherwise, you will run into usage limit errors.

You can also set up a usage limit if you have a paid set up, say, $10/month at

​https://beta.openai.com/account/billing/limits​

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Check out Elephas, which makes it easy to use GPT-3 / GPT-4 features on your Mac. Write emails, documents, and blogs in seconds, and rewrite sentences to different tones without leaving your application. Now, it supports loading your own documents.

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