Cisharpai.OpenAi 0.4.0

There is a newer prerelease version of this package available.
See the version list below for details.

dotnet add package Cisharpai.OpenAi --version 0.4.0

NuGet\Install-Package Cisharpai.OpenAi -Version 0.4.0

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="Cisharpai.OpenAi" Version="0.4.0" />

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

<PackageVersion Include="Cisharpai.OpenAi" Version="0.4.0" />
                    

                            Directory.Packages.props

<PackageReference Include="Cisharpai.OpenAi" />
                    

                            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 Cisharpai.OpenAi --version 0.4.0

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

#r "nuget: Cisharpai.OpenAi, 0.4.0"

#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 Cisharpai.OpenAi@0.4.0

#: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=Cisharpai.OpenAi&version=0.4.0
                    

                            Install as a Cake Addin

#tool nuget:?package=Cisharpai.OpenAi&version=0.4.0
                    

                            Install as a Cake Tool

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

Cisharpai.OpenAi

OpenAI provider for the Cisharpai unified LLM client library.

Features

Chat completions (GPT-4, GPT-4.1, GPT-4.5)
Reasoning models (o1, o3, o4-mini) with configurable reasoning effort
Responses API (GPT-5) with status/incomplete handling
Text embeddings (text-embedding-3-small, text-embedding-3-large, ada-002)
JSON Mode and Structured Outputs (with refusal handling)
Tool calling / function calling (all ToolChoice variants)
Vision (image file paths and base64)
Streaming (token-by-token via SSE)
Built-in HTTP resilience (retries, timeouts)

Quick Start

using Cisharpai;
using Cisharpai.Models;
using Cisharpai.OpenAi;
using Microsoft.Extensions.DependencyInjection;

var services = new ServiceCollection();
services.AddOpenAiClient(options =>
{
    options.ApiKey = "YOUR_API_KEY";
    options.DefaultModel = OpenAiModels.Chat.Gpt4_1Nano;
});

var provider = services.BuildServiceProvider();
var client = provider.GetRequiredService<IChatCompletionClient>();

var request = new ChatCompletionRequest(
    Messages: [new LlmMessage(LlmRole.User, "Say hello in one sentence.")],
    Temperature: 0.2,
    MaxTokens: 100);

var response = await client.GetChatCompletionAsync(request);
Console.WriteLine(response.Content);

Embeddings

services.AddOpenAiEmbeddingClient(options =>
{
    options.ApiKey = "YOUR_API_KEY";
    options.DefaultModel = OpenAiModels.Embedding.TextEmbedding3Small;
});

var embeddingClient = provider.GetRequiredService<IEmbeddingClient>();
var result = await embeddingClient.GetEmbeddingAsync(
    new EmbeddingRequest(Input: ["Hello world"]));

Available Models

Chat: Gpt4_1, Gpt4_1Mini, Gpt4_1Nano, Gpt4o, Gpt4oMini, Gpt4_5, O3, O3Mini, O3Pro, O4Mini, O1, O1Mini

Embedding: TextEmbedding3Small, TextEmbedding3Large, TextEmbeddingAda002

Product	Compatible and additional computed target framework versions.
.NET	net8.0 is compatible. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed. net9.0 was computed. 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 is compatible. 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.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on Cisharpai.OpenAi:

Package	Downloads
Cisharpai.Rag.OpenAi Bridge package connecting Cisharpai.OpenAi hosted retrieval (file_search) with Cisharpai.Rag's IRetriever contract.	644

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last Updated
0.5.0-alpha.16.404	72	9/27/2026
0.5.0-alpha.12.396	63	9/22/2026
0.5.0-alpha.8.391	64	9/21/2026
0.5.0-alpha.4.386	63	9/21/2026
0.4.0	139	9/20/2026
0.4.0-PullRequest81.41.376	67	9/16/2026
0.4.0-PullRequest81.36.378	61	9/16/2026
0.4.0-PullRequest81.36.377	58	9/16/2026
0.4.0-alpha.35.380	70	9/16/2026
0.4.0-alpha.34.368	67	9/15/2026
0.4.0-alpha.33.358	59	9/15/2026
0.4.0-alpha.32.353	61	9/15/2026
0.4.0-alpha.31.346	65	9/14/2026
0.4.0-alpha.30.340	62	9/14/2026
0.4.0-alpha.29.336	59	9/13/2026
0.4.0-alpha.28.330	65	9/13/2026
0.4.0-alpha.27.324	63	9/13/2026
0.4.0-alpha.26.319	58	9/13/2026
0.4.0-alpha.25.309	61	9/13/2026
0.4.0-alpha.24.306	58	9/13/2026