Sebastian Raschka • 1/17/2025

Implementing A Byte Pair Encoding (BPE) Tokenizer From Scratch

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This educational article provides a detailed, from-scratch implementation of the Byte Pair Encoding (BPE) tokenization algorithm. It explains the core concepts, compares it to character-level encoding, and discusses its use in modern LLMs like GPT-2, GPT-4, and Llama 3, making it a practical guide for understanding a fundamental NLP technique.

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#llm #algorithm #NLP
Implementing A Byte Pair Encoding (BPE) Tokenizer From Scratch

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