# Installer ngt avec Homebrew, Nix

Consultez les chemins d'installation, exécutables, métadonnées et notes de sécurité de ngt pour les workflows d'agents IA.

## installation

```sh
sudo av install brew:ngt
```

Commandes d'installation supplémentaires:

### macOS

- Homebrew (100%):

```sh
brew install ngt
```

  Preuve: local Homebrew formula metadata

### Linux

- Nix (92%):

```sh
nix profile install nixpkgs#ngt
```

  Preuve: nixpkgs package indexes: pkgs/by-name/ng/ngt/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

## Faits du paquet

- **Clé du paquet:** brew:ngt
- **Gestionnaire de paquets:** Homebrew
- **Version:** 2.7.4
- **Résumé source:** Neighborhood graph and tree for indexing high-dimensional data
- **Page d'accueil:** <https://github.com/NGT-labs/NGT>
- **Dépôt:** <https://github.com/NGT-labs/NGT>
- **Dernière mise à jour:** 2026-05-08T19:35:29Z
- **Généré:** 2026-08-03T19:37:03+00:00

## exécutables

- ngt (alias)
- qbg (alias)

## Comportement d'installation

- Bouteille: non disponible

## Version et fraîcheur

- page générée: 2026-08-03
- version du gestionnaire: 2.7.4
## Historique du projet et usages

NGT, Neighborhood Graph and Tree, is Yahoo Japan/LY Corporation's approximate nearest neighbor search library for large, high-dimensional vector data. It provides command-line tools and C, C++, and Python interfaces for building vector indices and searching them quickly.

### Historique du projet

Masajiro Iwasaki wrote in April 2023 that Yahoo! JAPAN Research released NGT as open-source software in September 2016. The GitHub README credits Yahoo Japan Corporation from 2015 and anchors the project in graph/tree approximate nearest-neighbor methods, later adding ONNG, NGTQ, QG, and QBG variants.

The release notes embedded in the README show a progression from ONNG availability in August 2018, quantized NGT in December 2018, PyPI packaging in January and June 2019, QG in January 2021, FP16 in February 2022, and QBG/QG command consolidation in August 2022. Homebrew packaged stable version 2.7.4 on July 1, 2026.

### Historique d'adoption

NGT's adoption is specialized but real in the vector-search world. The 2019 Opensource.com article says Yahoo! Japan used it for similarity-based fashion-item search, and the 2023 maintainer article says it was adopted by a number of Yahoo! JAPAN services through Vald. It is also cited in ANN benchmark and similarity-search literature.

Homebrew analytics on July 1, 2026 reported 268 install-on-request events over 365 days, which fits the package's role: useful for ML/search engineers and benchmarking people, not a mainstream developer utility.

### Modes d'utilisation

The package-nerd path is to install `ngt`, generate or export vectors, create an index with a command such as `ngt create -d 300 -D c index objects.ssv`, and search with `ngt search -n 10 index query.ssv`. Python users can install the binding from PyPI under the `ngt` package and use `ngtpy`.

QG and QBG matter when datasets get large enough that memory traffic dominates. The README describes NGT as graph/tree based, QG as quantized graph based, and QBG as quantized blob graph based; QBG is specifically documented for billion-object scale.

### Chronologie

- {'date': '2016-09', 'event': "Yahoo! JAPAN Research released NGT as open-source software, according to Masajiro Iwasaki's 2023 article."}
- {'date': '2018-08-08', 'event': 'ONNG became available in NGT v1.4.0.'}
- {'date': '2019-01-17', 'event': 'Python NGT became installable through PyPI in v1.5.1.'}
- {'date': '2021-01-15', 'event': 'NGT v1.13.0 added Quantized Graph support.'}
- {'date': '2022-08-10', 'event': 'QBG and renewed QG became available in v2.0.0.'}

### Related projects

- Vald
- ANN-Benchmarks
- Faiss
- hnswlib
- Annoy
- ScaNN

### Sources

- <https://formulae.brew.sh/api/formula/ngt.json>
- <https://github.com/NGT-labs/NGT>
- <https://medium.com/@masajiro.iwasaki/fusion-of-graph-based-indexing-and-product-quantization-for-ann-search-7d1f0336d0d0>
- <https://opensource.com/article/19/10/ngt-open-source-library>
- <https://research.lycorp.co.jp/en/softwaredata>


## Notes de sécurité

Aucun manifest local de gestion des secrets correspondant n'a été trouvé pour ngt. Les métadonnées de paquet Nucleus restent publiées ici afin que la couverture future dispose d'une URL stable.


## Autres enregistrements de gestionnaires de paquets

- Nix - ngt: normalized package name match | nixpkgs package indexes: pkgs/by-name/ng/ngt/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1


## Combined YAML source

View the package source record on GitHub. [combined/ngt.yml](https://github.com/mxcl/pkgdb/blob/main/combined/ngt.yml)


## Sources

- pkg.so package database
- Geiger risk classifier
- curated package history
- pkgdb category and tag curation
- external package-manager database matches
- cross-ecosystem install command graph