# FAISS: what AI models say (September 2026)

Source: Memetik Index, https://www.memetik.ai/vendors/faiss
Website: https://faiss.ai

FAISS was named in 1 of 50 AI answers across 1 category. Best position: Vector databases, 2% answer share, ranked #16, named first in 0%.

## What FAISS is

FAISS is a library for similarity search and clustering of dense vectors. It is intended for people building systems that need to find vectors close to a given vector or group vectors by similarity.

FAISS builds an index from a set of vectors, usually in RAM, then searches that index for the nearest neighbours to a new vector. It can process several query vectors at once. Some algorithms have GPU implementations, and an index can also be stored on disk instead of kept in RAM.

(From FAISS's own website, read 2026-09-02.)

## By category

| Category | Rank | Answer share | Named first | Models |
|---|---|---|---|---|
| Vector databases (https://www.memetik.ai/index/vector-databases) | #16 of 16 | 2% | 0% | ChatGPT |