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I built a tiny GPT from scratch to show my kids how chatbots really work

What actually happens inside a GPT? Everyone talks about "attention" and "transformers" and "training", but if you had to build one with nothing but arrays of numbers, where would you even start? I've been coding for over 30 years and I couldn't have told you. So I built a small one in Python and c…

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  1. 2026-11-04 22:09 · DEV Community — Machine Learning
    I built a tiny GPT from scratch to show my kids how chatbots really work

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