Implementing A Byte Pair Encoding (BPE) Tokenizer From Scratch
Read OriginalThis article provides a detailed, educational implementation of the Byte Pair Encoding (BPE) tokenization algorithm from scratch. It explains the core concepts of BPE, used in models like GPT-2 through GPT-4 and Llama 3, and contrasts the educational implementation with production libraries like OpenAI's tiktoken. The content covers converting text to bytes, the motivation for subword tokenization, and includes code for training a tokenizer.
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