Fine tune or "Teach" an OpenAI model using the API (Legacy)

WARNING! - This is a legacy feature of OpenAI, it will be shut down on January 4th, 2024. Check more information: https://platform.openai.com/docs/api-reference/fine-tunes

Manage fine-tuning jobs to tailor a model to your specific training data.

More info: https://platform.openai.com/docs/api-reference/fine-tunes

The following example demonstrates all functions which are related to the fine tune operations.

static async Task Main(string[] args)
{
    // This example demonstrates, how you can fine tune a model with the information you provide.
    // More information: https://platform.openai.com/docs/guides/fine-tuning
    //
    // The very first step to create an account at OpenAI: https://platform.openai.com/
    // Using the loggedIn account, navigate to https://platform.openai.com/account/api-keys
    // Here you can create apiKey(s)

    using var host = Host.CreateDefaultBuilder(args)
        .ConfigureServices((builder, services) =>
        {
            services.AddForgeOpenAI(options =>
            {
                options.AuthenticationInfo = builder.Configuration["OpenAI:ApiKey"]!;
            });
        })
        .Build();

    IOpenAIService openAi = host.Services.GetService<IOpenAIService>()!;

    Console.WriteLine("Uploading training file...");

    FileUploadRequest uploadRequest = new FileUploadRequest();
    uploadRequest.File = new BinaryContentData() 
    { 
        ContentName = "training", 
        SourceStream = File.OpenRead("training.jsonl") 
    };
    uploadRequest.Purpose = "fine-tune";

    HttpOperationResult<FileUploadResponse> responseUpload = 
        await openAi.FileService
            .UploadFileAsync(uploadRequest, CancellationToken.None)
                .ConfigureAwait(false);
    
    if (responseUpload.IsSuccess)
    {
        Console.WriteLine($"Uploaded, id: {responseUpload.Result!.Id}");
        Console.WriteLine("Creating fine tune job");
        Console.WriteLine();

        FineTuneCreateRequest createRequest = new FineTuneCreateRequest();
        createRequest.TrainingFileId = responseUpload.Result!.Id;

        HttpOperationResult<FineTuneCreateResponse> createResponse = 
            await openAi.FineTuneService
                .CreateAsync(createRequest, CancellationToken.None)
                    .ConfigureAwait(false);
        
        if (createResponse.IsSuccess)
        {
            Console.WriteLine($"Job created, id: {createResponse.Result!.Id}");
            Console.WriteLine("List fine tune jobs");
            Console.WriteLine();

            HttpOperationResult<FineTuneListResponse> listResponse = 
                await openAi.FineTuneService
                    .GetAsync(CancellationToken.None)
                        .ConfigureAwait(false);
            
            if (listResponse.IsSuccess)
            {
                listResponse.Result!.Jobs.ForEach(job =>
                {
                    Console.WriteLine(job);
                    Console.WriteLine();
                });
            }
            else
            {
                Console.WriteLine(listResponse);
            }

            Console.WriteLine();
            Console.WriteLine($"Retrieve fine tune job data, id: {createResponse.Result!.Id}");
            Console.WriteLine();

            HttpOperationResult<FineTuneJobDataResponse> responseJobData = 
                await openAi.FineTuneService
                    .GetAsync(createResponse.Result!.Id, CancellationToken.None)
                        .ConfigureAwait(false);
            
            if (responseJobData.IsSuccess)
            {
                Console.WriteLine(responseJobData.Result!);
                Console.WriteLine();
            }
            else
            {
                Console.WriteLine(responseJobData);
            }

            Console.WriteLine();
            Console.WriteLine("List fine tune events (sync mode)");
            Console.WriteLine();

            HttpOperationResult<FineTuneJobEventsResponse> eventsResponse = 
                await openAi.FineTuneService
                    .GetEventsAsync(createResponse.Result!.Id, CancellationToken.None)
                        .ConfigureAwait(false);
            
            if (eventsResponse.IsSuccess)
            {
                Console.WriteLine(eventsResponse.Result!);
                Console.WriteLine();
            }
            else
            {
                Console.WriteLine(eventsResponse);
            }

#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
            Task.Run(async () => { 
                Console.WriteLine();
                Console.WriteLine("List fine tune events (async mode - callback)");
                Console.WriteLine();

                Action<HttpOperationResult<FineTuneJobEvent>> eventResultCallback = 
                    (HttpOperationResult<FineTuneJobEvent> response) =>
                {
                    if (response.IsSuccess)
                    {
                        Console.WriteLine("RESULT (async mode - callback)");
                        Console.WriteLine(response.Result!);
                    }
                    else
                    {
                        Console.WriteLine(response);
                    }
                };

                HttpOperationResult eventsCallbackModeResponse = 
                    await openAi.FineTuneService
                        .GetEventsAsStreamAsync(createResponse.Result!.Id, eventResultCallback, CancellationToken.None)
                            .ConfigureAwait(false);
                
                if (eventsCallbackModeResponse.IsSuccess)
                {
                    Console.WriteLine();
                    Console.WriteLine("DONE (async mode - callback)");
                    Console.WriteLine();
                }
                else
                {
                    Console.WriteLine(eventsCallbackModeResponse);
                }
            });

            Task.Run(async () => { 
                Console.WriteLine();
                Console.WriteLine("List fine tune events (async mode - IAsyncEnumerable)");
                Console.WriteLine();

                await foreach (HttpOperationResult<FineTuneJobEvent> response in 
                    openAi.FineTuneService
                        .GetEventsAsStreamAsync(createResponse.Result!.Id, CancellationToken.None))
                {
                    if (response.IsSuccess)
                    {
                        Console.WriteLine("RESULT (async mode - IAsyncEnumerable)");
                        Console.WriteLine(response.Result!);
                        Console.WriteLine();
                    }
                    else
                    {
                        Console.WriteLine(response);
                    }
                }
            });
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed

            Console.WriteLine("Press a key to cancel fine tune job and release async event readers");
            Console.ReadKey();

            Console.WriteLine();
            Console.WriteLine("Cancel fine tune job");
            Console.WriteLine();

            HttpOperationResult<FineTuneCancelResponse> responseCancel = 
                await openAi.FineTuneService
                    .CancelAsync(createResponse.Result!.Id, CancellationToken.None)
                        .ConfigureAwait(false);
            
            if (responseCancel.IsSuccess)
            {
                Console.WriteLine(responseCancel.Result!);
                Console.WriteLine();
            }
            else
            {
                Console.WriteLine(responseCancel);
            }

        }
        else
        {
            Console.WriteLine(createResponse);
        }

        Console.WriteLine();
        Console.WriteLine("Deleting training file");
        await openAi.FileService.DeleteFileAsync(responseUpload.Result!.Id, CancellationToken.None);

    }
    else
    {
        Console.WriteLine(responseUpload);
    }

}