Udemy – How ChatGPT Actually Works: LLM Principles Without Code

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The curriculum, the teaching material, the examples, and the hands-on labs are the instructor’s own. You already use ChatGPT every day. So why does it still surprise you? It writes a brilliant summary, then invents a statistic that never existed.. You already use ChatGPT every day. So why does it still surprise you? It writes a brilliant summary, then invents a statistic that never existed. It follows your instructions perfectly for twenty messages, then forgets your name. It insists there are two r’s in “strawberry.” Most AI courses answer this with more prompt templates. This one answers it with the machine itself. This is a principles course, not a prompt course.

In three and a half hours, you’ll learn the five mechanisms that produce every ChatGPT behavior you’ve ever seen — good and bad:

• Tokenization — how the model chops your text into pieces before it reads a single word
• Embeddings — how “meaning” becomes a list of numbers, and why king − man + woman = queen
• Probability — why the model predicts the next token instead of looking up an answer
• Temperature — the dial between “boringly consistent” and “creatively wrong”
• The context window — why long conversations lose the thread, and what to do about it

Once you can name the mechanism, AI failures stop being mysterious. You stop guessing which prompt trick might work. You start predicting what the model will do before you press Enter.