GPT-4 is the next iteration after GPT 3.5. While not that different, it still has two important differences: can process much more tokens and in the future, it will also accept image inputs. Let’s use Postman to call the ChatGPT API and get a simple example working. — Important: Currently GPT-4 is in limited beta and only accessible to a small group of people. Get an API key for OpenAI Access to all OpenAI models is granted based on an API key. To use the GPT-4 API, you will need to have an OpenAI account. If you have already used ChatGPT, you already have…