# Vector search and ANN indexes

Area: [Retrieval-augmented generation](https://mlsanity.com/rag/index.md). HTML: https://mlsanity.com/rag/vector-search-and-ann-indexes/

## Key facts

- Vector search and ANN indexes: 32 papers on arXiv since 2024 (data through 14 Oct 2026).
- 2 of its 32 mapped papers (6%) cite “In-Place Updates of a Graph Index for Streaming Approximate Nearest Neighbor Search” (2025, arXiv 2502.13826).
- 2 of its 32 mapped papers (6%) cite “SINDI: An Efficient Index for Sparse Vector Approximate Maximum Inner Product Search” (2025, arXiv 2509.08395).
- 1 new papers 17 Sep–14 Oct.

## Most cited here

- [In-Place Updates of a Graph Index for Streaming Approximate Nearest Neighbor Search](https://mlsanity.com/paper/2502.13826/) (2025), cited by 2 papers here
- [SINDI: An Efficient Index for Sparse Vector Approximate Maximum Inner Product Search](https://mlsanity.com/paper/2509.08395/) (2025), cited by 2 papers here
- [MicroNN: An On-device Disk-resident Updatable Vector Database](https://mlsanity.com/paper/2504.05573/) (2025), cited by 1 papers here
- [LSM-VEC: A Large-Scale Disk-Based System for Dynamic Vector Search](https://mlsanity.com/paper/2505.17152/) (2025), cited by 1 papers here
- [Benchmarking Filtered Approximate Nearest Neighbor Search Algorithms on Transformer-based Embedding Vectors](https://mlsanity.com/paper/2507.21989/) (2025), cited by 1 papers here

## New (17 Sep–14 Oct)

- [Exploiting Residual Reachability for Cross-Model Migration of Graph-Based Indexes in Approximate Nearest Neighbor Search](https://mlsanity.com/paper/2609.23036/) (2026-09-19)