How AI Models Are Actually Trained (Step-by-Step)

AI models don’t magically “learn.” They are trained using massive datasets, powerful GPUs, and mathematical optimization. In this documentary-style explainer, we break down how modern AI systems are actually trained — step by step. You’ll learn: • What pretraining really means • How neural networks adjust billions of parameters • What “loss” and gradient descent are • How GPUs power large-scale training • What fine-tuning and human feedback do • Why training costs millions of dollars • Why AI still makes mistakes If you want to understand what happens behind the scenes before an AI model e…