How LLMs Actually Work | 0xkato

A from-the-ground-up walkthrough of how modern LLMs work, from tokens to transformer blocks to the next-token loop

How LLMs Actually Work | 0xkato How LLMs Actually Work Monday. June 01, 2026 - 26 mins Machine Learning Transformers LLM Neural Networks AI This post is a walkthrough of how LLMs work. Modern LLMs are mostly built by stacking transformer blocks over and over, so understanding the transformer machinery gets you most of the way there. I’ll cover the core mechanisms inside modern transformer-based LLMs, without all that sticky math stuff. Don’t get me wrong, you should learn the math, but this can serve as an introduction. Most modern LLMs share the same transformer-family skeleton. The differenc

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• Ishaan Panigrahi

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