OpenAI

Features 🔥

• Fully generated C# SDK based on official OpenAI OpenAPI specification using OpenApiGenerator
• Same day update to support new features
• Updated and supported automatically if there are no breaking changes
• Contains a supported list of constants such as current prices, models, and other
• Source generator to define functions natively through C# interfaces

Usage

using OpenAI;

public enum Unit
{
    Celsius,
    Fahrenheit,
}

public class Weather
{
    public string Location { get; set; } = string.Empty;
    public double Temperature { get; set; }
    public Unit Unit { get; set; }
    public string Description { get; set; } = string.Empty;
}

[OpenAiFunctions]
public interface IWeatherFunctions
{
    [Description("Get the current weather in a given location")]
    public Task<Weather> GetCurrentWeatherAsync(
        [Description("The city and state, e.g. San Francisco, CA")] string location,
        Unit unit = Unit.Celsius,
        CancellationToken cancellationToken = default);
}

public class WeatherService : IWeatherFunctions
{
    public Task<Weather> GetCurrentWeatherAsync(string location, Unit unit = Unit.Celsius, CancellationToken cancellationToken = default)
    {
        return Task.FromResult(new Weather
        {
            Location = location,
            Temperature = 22.0,
            Unit = unit,
            Description = "Sunny",
        });
    }
}

using var api = new OpenAiApi();
api.AuthorizeUsingBearer(apiKey);

var service = new WeatherService();
var tools = service.AsTools();

var messages = new List<ChatCompletionRequestMessage>
{
    "You are a helpful weather assistant.".AsSystemMessage(),
    "What is the current temperature in Dubai, UAE in Celsius?".AsUserMessage(),
};
var model = ChatModels.Gpt35Turbo.Id;
var result = await api.Chat.CreateChatCompletionAsync(
    messages,
    model: model,
    tools: tools);
var resultMessage = result.Choices.First().Message;
messages.Add(resultMessage.AsRequestMessage());

foreach (var call in resultMessage.ToolCalls)
{
    var json = await service.CallAsync(
        functionName: call.Function.Name,
        argumentsAsJson: call.Function.Arguments);
    messages.Add(json.AsToolMessage(call.Id));
}

var result = await api.Chat.CreateChatCompletionAsync(
    messages,
    model: model,
    tools: tools);
var resultMessage = result.Choices.First().Message;
messages.Add(resultMessage.AsRequestMessage());