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LEARN · Week 1 · Foundations

Pre-Training: The Prediction Machine

An AI model seems to know things. Then you ask about a rare topic and the answer drifts, or you change a few words in your request and get a different reply.

By the end of this lesson

  • You can explain the next word as a weighted coin flip.
  • You know a rare topic needs more context from you than a common one.
  • You can say why running a model costs money on every token.
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