Jamie's Blog

The curious developer's ODYSSEY, Exploring the Universe of TECH, CODE & AI.

How LLMs Work: An End-to-End Guide from Pre-training to Prediction

A deep dive into the complete lifecycle of a Large Language Model, from pre-training and fine-tuning to the inner workings of the decoder-only transformer architecture during inference.

Posted by Jamie Zhang on Wednesday, February 25, 2026

Senior Software Engineer, Open source enthusiast, PMP, Scrum master

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