In this talk you will learn how transformer neural networks and Hugging Face are enabling machine learning practitioners to harness the power of thousands of pretrained models via the Hub and its open-source ecosystem. With an eye towards large language models, you will learn how these models are fine-tuned for chat applications and the progress that the global AI community has made towards building systems that rival ChatGPT. If you've always wanted to have a personal AI assistant that runs on your laptop, then this talk is for you!