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What is tokenization in LLMs

May 14, 2026
4:20

Dive deep into the fundamental concept that powers Large Language Models (LLMs): tokenization. In this video, we demystify how AI systems like ChatGPT understand and generate human language by breaking down text into manageable pieces called tokens. Learn why this crucial first step is essential, transforming human-readable text into numerical representations that LLMs can process. We explore what constitutes a token – from whole words to sub-word units and punctuation – and the numerical IDs assigned to each. Discover the limitations of traditional word-based tokenization and understand how this process enables LLMs to grasp meaning and context through complex mathematical operations. This is your essential guide to the core mechanism behind AI's language comprehension.

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What is tokenization in LLMs | NatokHD