Hands-On Large Language Models is the companion code repository for the book by Jay Alammar and Maarten Grootendorst. The book and repository take a strongly visual and practical approach to explaining modern language models, with hundreds of custom figures and executable examples that connect core concepts to working implementations.

The material progresses from tokens, embeddings, and transformer internals through text classification, clustering, topic modeling, prompt engineering, text generation, semantic search, retrieval-augmented generation, multimodal models, embedding-model creation, and fine-tuning. The examples are designed to be run easily in Google Colab, including access to GPU resources.

The repository is useful for learners who want more than a conceptual introduction to LLMs. It provides notebooks and code that can be modified while reading the book, making it suitable for self-study, courses, workshops, and practitioners who want a structured path from language-model fundamentals to applied techniques.