CHAT GTP by Open AI

Chat GPT is a model developed by Open AI that interacts in a conversational way. The dialogue format makes it possible for Chat GPT to answer follow-up questions, admit its mistakes, challenge incorrect premises, and reject inappropriate requests.

Chat GPT is a sibling model to Instruct GPT, which is trained to follow instructions in a prompt and provide a detailed response. During the research preview, usage of Chat GPT is free. You can try it now at chat.openai.com.