Paytm CEO Vijay Shekhar Sharma marked three years of the launch of OpenAI's chatbot ChatGPT and said, "Last 1,000 days have changed humanity forever." Sharma said this while sharing a three-year-old tweet of CEO Sam Altman, who, while launching ChatGPT, said, "Today we launched ChatGPT. Try talking with it." Since its launch, OpenAI has released several updated models of ChatGPT.