Delphi ActiveX

Referencing a Pre-Uploaded File by file_id in an AI Request

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Some AI proviers have a Files API that lets you upload content once and then reference it later in generation requests using a file_id. This is especially useful for large documents, reuse across multiple prompts, or keeping inputs structured and separate from your prompt text.

This example demonstrates how to use a file_id in a request.

Delphi ActiveX

var
success: Integer;
ai: TChilkatAi;
file_id: WideString;
sbResponse: TChilkatStringBuilder;

begin
success := 0;

success := 0;

//  This example assumes the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

ai := TChilkatAi.Create(Self);

//  The provider can be "openai", "google", "claude", "mistral", "deepseek", "xai", or any provider
//  that supports referencing pre-uploaded files by a file_id (or file uri).
ai.Provider := 'openai';

//  Use your provider's API key.
ai.ApiKey := 'MY_API_KEY';

//  Choose a model.
ai.Model := 'gpt-5.6-luna';

//  See the following example showing how to upload a file
//  Upload a File to an AI Provider (OpenAI, Google, Antropic, X)

//  Use the file_id of the pre-uploaded file.
file_id := 'file-5G2xncrEiHbVfYPRpFgP9c';
ai.InputAddFileId(file_id,'application/json');

ai.InputAddText('Explain why Hamlet delays taking revenge, using only evidence from the file.');

//  Ask the AI for text output.
success := ai.Ask('text');
if (success = 0) then
  begin
    Memo1.Lines.Add(ai.LastErrorText);
    Exit;
  end;

//  Get the text response.
sbResponse := TChilkatStringBuilder.Create(Self);
ai.GetOutputTextSb(sbResponse.ControlInterface);
Memo1.Lines.Add(sbResponse.GetAsString());