ChatGPT - Wikipedia ChatGPT is a generative artificial intelligence chatbot developed by OpenAI and released in November 2022 It currently uses GPT-5 1, a generative pre-trained transformer (GPT), to generate text, speech, and images in response to user prompts [3][4] It is credited with accelerating the AI boom, an ongoing period marked by rapid investment and public attention toward the field of artificial
Generative pre-trained transformer - Wikipedia Original GPT model A generative pre-trained transformer (GPT) is a type of large language model (LLM) [1][2][3] that is widely used in generative AI chatbots [4][5] GPTs are based on a deep learning architecture called the transformer They are pre-trained on large datasets of unlabeled content, and able to generate novel content [2][3] OpenAI was the first to apply generative pre-training
GPT-4. 5 - Wikipedia GPT-4 5 (codenamed " Orion ") [2] is a large language model developed by OpenAI as part of the GPT series Officially released on February 27, 2025, GPT-4 5 is available to users subscribed to the ChatGPT Plus and Pro plans across web, mobile, and desktop platforms [3]