5/3/2023 0 Comments Ai brain icon![]() ![]() ĬhatGPT initially used a Microsoft Azure supercomputing infrastructure, powered by Nvidia GPUs, that Microsoft built specifically for OpenAI and that reportedly cost "hundreds of millions of dollars". These rankings were used to create "reward models" that were used to fine-tune the model further by using several iterations of Proximal Policy Optimization (PPO). ![]() In the reinforcement learning step, human trainers first ranked responses that the model had created in a previous conversation. ![]() In the case of supervised learning, the model was provided with conversations in which the trainers played both sides: the user and the AI assistant. Both approaches use human trainers to improve the model's performance. The fine-tuning process leveraged both supervised learning as well as reinforcement learning in a process called reinforcement learning from human feedback (RLHF). It was fine-tuned over an improved version of OpenAI's GPT-3 known as " GPT-3.5". A version based on GPT-4, the newest OpenAI model, was released on March 14, 2023, and is available for paid subscribers on a limited basis.ĬhatGPT is a member of the generative pre-trained transformer (GPT) family of language models. The original release of ChatGPT was based on GPT-3.5. ![]() In 2023, following the release of ChatGPT, OpenAI's valuation was estimated at US$29 billion. Its uneven factual accuracy, however, has been identified as a significant drawback. It is built on top of OpenAI's GPT-3.5 and GPT-4 families of large language models (LLMs) and has been fine-tuned (an approach to transfer learning) using both supervised and reinforcement learning techniques.ĬhatGPT launched as a prototype on Novemand garnered attention for its detailed responses and articulate answers across many domains of knowledge. ChatGPT is an artificial intelligence (AI) chatbot developed by OpenAI and released in November 2022. ![]()
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