ChatGPT is fine-tuned from a model in the GPT-3.5 series and is often excessively verbose and overuses certain phrases, such as restating that it’s a language model trained by OpenAI.
The dialogue format makes it possible for ChatGPT to answer followup questions, admit its mistakes, challenge incorrect premises, and reject inappropriate requests. ChatGPT is a sibling model to InstructGPT.
