Meta's similarity search library, the thing most vector databases are built on. Built by Meta.
Others in vector database
Common questions
Is FAISS free to use?
FAISS is open source and free to run yourself. You still pay whichever model provider you point it at, and this tutorial is free with no signup.
Do I need to know Python to use FAISS?
Basic Python is enough. Functions, dictionaries and imports cover most of what FAISS asks of you.
When should I not use FAISS?
When something else in vector database fits the job better. The others in that group are listed below.
Lessons for FAISS are being written. Meanwhile the APIs for AI tutorial covers the same ground: state, tools, loops, memory and human approval. Most of it carries straight over.
Start the APIs for AI tutorial →