Module 2: Vector Embeddings & Similarity Search

Embeddings turn text into vectors for semantic search.

Embedding Models

Compare OpenAI text-embedding-3-small vs open-source sentence-transformers.

Vector Databases

Set up ChromaDB locally or use Pinecone for managed vector storage.

Similarity Search

Implement top-k retrieval and filter by metadata for precise results.

Hybrid Search

Combine keyword (BM25) and vector search for best recall.