Demystifying AI: Learning LLMs Through 200 Lines of MicroGPT

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Large Language Models (LLMs) are often treated as black boxes. We feed them prompts, and they spit out code, essays, or architectural advice. But underneath the billions of parameters and GPU clusters, what is actually happening? On February 12, 2026, Andrej Karpathy published MicroGPT -- a single Python file, about 200 lines, zero dependencies, that trains and runs a GPT from scratch. No PyTorch.…

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