ChatGPT is a variant of the GPT (Generative Pre-training Transformer) language model, which was developed by OpenAI. It is specifically designed to be used in chatbot applications, where it can generate human-like text responses to user inputs in real-time.

Like other versions of GPT, ChatGPT is trained on a large dataset of human-generated text and uses this training data to generate text that is similar in style and content. However, ChatGPT has been fine-tuned for use in chatbot applications and is able to generate responses that are more relevant and appropriate for conversation.

One of the key features of ChatGPT is its ability to "remember" previous conversation turns and use this context to generate more coherent and contextually appropriate responses. This makes it well-suited for use in chatbot applications where the conversation may be more complex and require a greater degree of context to generate appropriate responses.

Overall, ChatGPT is a powerful tool for generating human-like text in chatbot applications and can be used to create chatbots that are able to hold natural, engaging conversations with users.