Delphi DLL

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

See more AI Examples

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 DLL

var
success: Boolean;
ai: HCkAi;
file_id: PWideChar;
sbResponse: HCkStringBuilder;

begin
success := False;

success := False;

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

ai := CkAi_Create();

//  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).
CkAi_putProvider(ai,'openai');

//  Use your provider's API key.
CkAi_putApiKey(ai,'MY_API_KEY');

//  Choose a model.
CkAi_putModel(ai,'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';
CkAi_InputAddFileId(ai,file_id,'application/json');

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

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

//  Get the text response.
sbResponse := CkStringBuilder_Create();
CkAi_GetOutputTextSb(ai,sbResponse);
Memo1.Lines.Add(CkStringBuilder__getAsString(sbResponse));

CkAi_Dispose(ai);
CkStringBuilder_Dispose(sbResponse);