Cianplan

Level 5: AI / LLM systems · L5.2 RAG & vector databases

Embeddings and vector search

Explain embeddings, similarity and ANN search.

12 min · Pro

What you take away

  • An embedding turns meaning into a point in space, so 'nearby' means 'about the same thing' — which is why it finds paraphrases keywords miss.

And 3 more inside the class, in Pro.

How the class is laid out

  1. The problem
  2. Three consequences
  3. Check your understanding