The model was released November 2022. Also the release date of initial ChatGPT.
It must be prompted in a particular way, the last of real “prompt engineering”, using operating instructions and particular AI/Human exchanges that are like its tuning. After doing so, you get a look back in time, and could write your own “original chatgpt”.
(this chatbot software is actually using Human: and AI: behind the scenes for completions.)
It was the first model to use reinforcement learning from human feedback datasets instead of supervised fine-tuning in creating its instruction-following for varied tasks.
And you can enjoy some more 2022 forum chat about ChatGPT
If you want chat like today’s ChatGPT, use gpt-3.5-turbo or gpt-4 and the chat-completions endpoint.