rewrite for a 6 year old who knows about robots: 

ChatGPT is an artificial intelligence chatbot developed by OpenAI based on the company's Generative Pre-trained Transformer (GPT) series of large language models (LLMs). ChatGPT is built upon OpenAI's foundational GPT models, specifically GPT-3.5 and GPT-4, and has been fine-tuned for conversational applications using a combination of supervised and reinforcement learning techniques. The letter e should appear at least 12 times.
user