el (From Scratch)” chapter-by-chapter live coding series by Sebastian Raschka is a hands-on educational course that walks learners through the full process of building a modern language model step by step. It is designed for learners who want to deeply understand how LLMs work by implementing them from the ground up.

The course begins with environment setup, ensuring learners have the correct Python tools and dependencies to start building language models.

It then moves into text processing fundamentals, including tokenization, where raw text is broken into meaningful units that models can understand.

Learners are guided through converting tokens into token IDs and adding special context tokens, which are essential for structured input representation.

A major focus is Byte Pair Encoding (BPE), a key tokenization method used in modern LLMs, helping compress and efficiently represent langu