Let’s Build the GPT Tokenizer: A Complete Guide to Tokenization in LLMs

· fast.ai · Oct. 16, 2025, 10:42 p.m.
Summary
This blog post presents a comprehensive guide to the process of tokenization in large language models (LLMs), inspired by Karpathy's well-known video on the subject. It includes detailed text explanations and code snippets, aimed at helping developers understand and implement effective tokenization techniques.
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