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LEARN · Week 1 · Foundations

Post-Training: Teaching It to Chat

A model can finish pre-training after reading a huge slice of the internet and still have no idea how to answer you. Pre-training only teaches it to predict what text comes next. Ask it a question and it might reply with three more questions. Plenty of forum pages look like that.

By the end of this lesson

  • You can name the two post-training steps that teach a model to answer.
  • You know human ratings are what lift good answers and sink bad ones.
  • You can tell a plain text predictor from a working assistant.
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