There's a distinction between GPT and ChatGPT, with GPT being the underlying AI model that powers ChatGPT, which is an optimized chatbot designed for conversational interactions. GPT is a language model trained on vast amounts of internet data, allowing it to generate text, analyze images, and perform other tasks, while ChatGPT relies on GPT's parameters to produce responses in a dialogue-driven application. The two are related but distinct entities, with GPT serving as the brain behind various tools beyond ChatGPT, including Jasper and Writesonic, and an open API that enables developers to integrate its functions into their own applications.