# ngt mit Homebrew, Nix installieren

Prüfe Installationswege, Executables, Metadaten und Sicherheitshinweise für ngt in AI-Agent-Workflows.

## Installation

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

Weitere Installationsbefehle:

### macOS

- Homebrew (100%):

```sh
brew install ngt
```

  Evidenz: local Homebrew formula metadata

### Linux

- Nix (92%):

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

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

## Paketfakten

- **Paketschlüssel:** brew:ngt
- **Paketmanager:** Homebrew
- **Version:** 2.7.4
- **Quellzusammenfassung:** Neighborhood graph and tree for indexing high-dimensional data
- **Homepage:** <https://github.com/NGT-labs/NGT>
- **Repository:** <https://github.com/NGT-labs/NGT>
- **Zuletzt aktualisiert:** 2026-05-08T19:35:29Z
- **Generiert:** 2026-08-03T19:37:03+00:00

## Executables

- ngt (Alias)
- qbg (Alias)

## Installationsverhalten

- Bottle: nicht verfügbar

## Version und Aktualität

- Seite generiert: 2026-08-03
- Manager-Version: 2.7.4
## Projektgeschichte und Nutzung

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.

### Projektgeschichte

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.

### Adoptionsgeschichte

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.

### Wie es verwendet wird

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.

### Zeitleiste

- {'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

### Quellen

- <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>


## Sicherheitshinweise

Für ngt wurde kein passendes lokales Secret-Handling-Manifest gefunden. Nucleus-Paketmetadaten bleiben hier veröffentlicht, damit künftige Abdeckung eine stabile Paket-URL hat.


## Andere Paketmanager-Einträge

- 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)


## Quellen

- 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