Faiss.NET.Interop 1.0.0-preview.5

This is a prerelease version of Faiss.NET.Interop.

dotnet add package Faiss.NET.Interop --version 1.0.0-preview.5

NuGet\Install-Package Faiss.NET.Interop -Version 1.0.0-preview.5

This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.

<PackageReference Include="Faiss.NET.Interop" Version="1.0.0-preview.5" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="Faiss.NET.Interop" Version="1.0.0-preview.5" />
                    

                            Directory.Packages.props

<PackageReference Include="Faiss.NET.Interop" />
                    

                            Project file

For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.

paket add Faiss.NET.Interop --version 1.0.0-preview.5

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: Faiss.NET.Interop, 1.0.0-preview.5"

#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.

#:package Faiss.NET.Interop@1.0.0-preview.5

#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package.

#addin nuget:?package=Faiss.NET.Interop&version=1.0.0-preview.5&prerelease
                    

                            Install as a Cake Addin

#tool nuget:?package=Faiss.NET.Interop&version=1.0.0-preview.5&prerelease
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Faiss.NET

High-performance C#/.NET bindings for Faiss.

Faiss.NET gives you near-native performance with clean, idiomatic C# wrappers while staying as close as possible to the original Faiss API.

Faiss v1.14.1
.NET 9.0

This library is under active development. Core indexes and functionality are usable, but the API may still evolve and not every feature is complete yet.

Features

Thin, "bare-metal" bindings with minimal overhead
Extensions on top bindings for excellent DX
Cross-platform support (Windows, Linux, macOS all x64 & arm64)
Strongly-typed wrappers + generic factory for all Faiss indexes
GPU acceleration (CUDA & ROCm)
It just works™

Installation
Usage
Supported Platforms
License

Installation

Prerequisites

Windows

winget install --id Microsoft.VCRedist.2015+.x64 --silent

Linux

sudo apt-get install -y libopenblas0 libgomp1 libgfortran5

macOS

brew install libomp

NuGet Package

Pick either the CPU only or the CPU + GPU support NuGet, do not mix on the same platform, it would cause undefined behavior.

CPU only

dotnet add package Faiss.NET.Native

CPU+GPU

CUDA

dotnet add package Faiss.NET.Native.Gpu.Cuda # Linux only
dotnet add package Faiss.NET.Native.Windows
dotnet add package Faiss.NET.Native.MacOS

ROCm

dotnet add package Faiss.NET.Native.Gpu.Rocm # Linux x64 only
dotnet add package Faiss.NET.Native.Windows
dotnet add package Faiss.NET.Native.MacOS

Usage

Basic Flat index

using Faiss.NET;

int dimensions = 4;
using var index = new IndexFlatL2(dimensions);

float[] vector = [1.0f, 2.0f, 3.0f, 4.0f];
index.Add(vector);

using var result = index.Search(vector, k: 1);

float distance = result.Distances[0]; // 0.0f
long label = result.Labels[0]; // 0

Supported Platforms

Platform	x64	arm64
Windows	✅	✅
Linux	✅	✅
macOS	✅	✅

GPU Acceleration

Backend	Platform	x64	arm64
CUDA	Linux	✅	✅
ROCm	Linux	✅	❌

Supported CUDA GPUs

Compute Capability	Architecture	Example GPUs
75	Turing	RTX 20-series, Tesla T4
80	Ampere	A100
86	Ampere	RTX 30-series, A40, A10, A16, A30
89	Ada Lovelace	RTX 40-series, L40, L40S, L4
90	Hopper	H100, H200
120	Blackwell	RTX 50-series, B100, B200, GB200

Supported ROCm GPUs

GFX Architecture	Architecture	Example GPUs
gfx90a	CDNA2	AMD Instinct MI210, MI250, MI250X
gfx942	CDNA3	AMD Instinct MI300A, MI300X, MI325X
gfx950	CDNA4	AMD Instinct MI355X, MI350 series
gfx1030 / 1031 / 1032	RDNA2	Radeon RX 6600–6900 series
gfx1100 / 1101 / 1102	RDNA3	Radeon RX 7700–7900 series
gfx1200 / 1201	RDNA4	Radeon RX 9060 series and RX 9070 series

License

See the LICENSE file for details.

Faiss.NET is not affiliated with Meta or the original Faiss project.

Product	Compatible and additional computed target framework versions.
.NET	net9.0 is compatible. net9.0-android was computed. net9.0-browser was computed. net9.0-ios was computed. net9.0-maccatalyst was computed. net9.0-macos was computed. net9.0-tvos was computed. net9.0-windows was computed. net10.0 was computed. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed.

Product

.NET

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

net9.0
- No dependencies.

NuGet packages (5)

Showing the top 5 NuGet packages that depend on Faiss.NET.Interop:

Package	Downloads
Faiss.NET.Native.Linux Native Linux (x64 and arm64) binaries for Faiss.NET.	737
Faiss.NET.Native.MacOS Native MacOS (x64 and arm64) binaries for Faiss.NET.	737
Faiss.NET.Native Cross-platform native binaries meta-package for Faiss.NET. Includes Linux, Windows, and macOS runtimes.	726
Faiss.NET.Native.Windows Native Windows (x64 and arm64) binaries for Faiss.NET.	475
Faiss.NET.Gpu GPU extension for Faiss.NET.	418

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last Updated
1.0.0-preview.5	121	5/18/2026
1.0.0-preview.4	200	4/30/2026
1.0.0-preview.3	86	3/31/2026
1.0.0-preview.2	77	3/30/2026