GPTwitter is a social media platform that leverages Large Language Models (LLMs) to generate personalized tweets based on users' interactions, aiming to create an experience that learns from their preferences without explicit personal guidance. By sampling directly from the latent space of GPT-3, it achieves user-level personalization in a novel and reproducible way. The platform's experiments highlight the importance of consistency, diversity, and spontaneity in LLM output, as well as the potential benefits of hallucinations in creative workflows, which were previously underutilized. GPTwitter is an innovative application that showcases the possibilities of LangChain technology and its potential to augment and improve personal creativity.