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History of ChatGPT History of ChatGPT About ChatGPT ChatGPT is an advanced conversational model by OpenAI, built on the GPT (Generative Pre-trained Transformer) architecture. ChatGPT Timeline 2018 – GPT-1 released. 2019 – GPT-2 launched (1.5B parameters). 2020 – GPT-3 introduced (175B parameters). 2022 – Public release of ChatGPT. 2023 – GPT-4 launched. Future – GPT-5 and beyond expected. Try ChatGPT Now Key Features Natural, human-like interaction Assists with writing, coding, learning Multilingual support © 2025 AI Blog | Page 2