After years of hype and speculation, OpenAI has officially launched a new lineup of large language models (LLMs), all different-sized variants of GPT-5, the long-awaited successor to its GPT-4 model ...

ChatGPT launched publicly on 30 November 2022 as a “research preview.” It was powered by GPT-3.5, marking the first time a powerful generative-pretrained transformer model was widely available in a ...