
How AI Models Are Trained: The Full Pipeline Explained
Training a large language model is not a single act — it is a five-stage industrial process that begins with petabytes of scraped text, passes through weeks of GPU computation consuming millions of dollars of electricity, and ends with a model that can hold a coherent conversation. Each stage has a specific job, a distinct failure mode, and a measurable cost. Here is how the whole pipeline works, from raw data to deployed product.



