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Module 8 of 1611 min read5 sub-lessons Docs view

Module 8: Vector Embeddings Simplified

Understand vector embeddings, similarity, cosine distance, and vector databases in plain English. Pick the right embedding model and vector DB for your project.

Module 8: Vector Embeddings Simplified

What this module gives you

Get fluent with vectors, embeddings, similarity, and the vector database choices you will face in Module 9. By the end, you can compare, ingest, and query embeddings confidently.

Skills you will pick up

  • Explaining embeddings without math
  • Computing cosine similarity
  • Picking an embedding model
  • Choosing a vector DB
  • Running your first embedding queries

Why it matters in production

Embeddings power RAG, semantic search, recommendations, classification, and clustering. Picking the right embedding model often improves a feature more than picking a fancier LLM.

Lessons in this module

  1. 1

    Lesson 8.1

    What is an embedding, really?

    2 min
  2. 2

    Lesson 8.2

    Cosine similarity in 60 seconds

    2 min
  3. 3

    Lesson 8.3

    Embedding models in 2026: OpenAI, Voyage, Cohere, open source

    2 min
  4. 4

    Lesson 8.4

    Vector databases: when to use what

    2 min
  5. 5

    Lesson 8.5

    Your first embedding query in Python

    2 min

Recap

Embeddings, cosine similarity, model choices, vector DBs, and your first semantic search are now in your toolkit. You are ready to build a real RAG system.

Ready to start?

Open Lesson 8.1: What is an embedding, really?

Start first lesson