ChatGPT is a large-scale natural language processing model developed by OpenAI. It’s based on the Transformer architecture, which was introduced in a research paper by Google in 2017. ChatGPT was trained on a massive corpus of text data using unsupervised learning techniques, allowing it to generate human-like responses to a wide range of prompts and queries.

The original version of ChatGPT, released in 2019, was based on the GPT-2 architecture and had 1.5 billion parameters. In June 2020, OpenAI released a larger version of the model, called GPT-3, which had 175 billion parameters and achieved state-of-the-art results on a number of natural language processing tasks. ChatGPT is a smaller and more efficient version of GPT-3, with 6 billion parameters, designed specifically for use in chatbots and conversational agents.

ChatGPT is able to understand and generate text in a variety of languages, including English, Spanish, French, German, Italian, and more. It can be used for a variety of applications, including chatbots, language translation, text summarization, and more.