How LLMs work, how to write prompts that get reliable results, and how to check what comes back.
Large language models (LLMs) such as Claude and GPT can draft, summarise, classify and reason over text — but the quality of what you get depends heavily on what you ask. This course covers what these models actually do, the building blocks of a good prompt, and the habits that stop you trusting a confident wrong answer.
No coding is needed, though the last lessons include optional examples for people who call models from code.
4 lessons · 57 min
Tokens, prediction and the context window.
Context, a clear task, constraints and the audience.
Few-shot examples and output you can parse.
Why models make things up, and a routine for catching it.
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Turn text into vectors, build a semantic search index, and ground an LLM's answers in your own documents.
How LLM agents call tools in a loop, how to design tools they use well, and how to keep agents safe and reliable.
Build test sets, grade outputs with code, people and model-based graders, and catch regressions before your users do.