OpenAI model history

1. Feb 14, 2019GPT-2

   A glimpse of fluent text generation

2. May 28, 2020GPT-3

   One model, many language tasks

3. Nov 30, 2022ChatGPT (GPT-3.5)

   Conversational AI reaches a wider audience

4. Mar 14, 2023GPT-4

   A step forward in reasoning and images

5. May 13, 2024GPT-4o

   Text, vision and audio come together

Selected releases from 2019 to May 2024. Later OpenAI releases are not covered in this source reviewed timeline.