Lianja

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.

Lianja

llSuccess = .F.

llSuccess = .F.

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

loAi = createobject("CkAi")

//  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).
loAi.Provider = "openai"

//  Use your provider's API key.
loAi.ApiKey = "MY_API_KEY"

//  Choose a model.
loAi.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.
lcFile_id = "file-5G2xncrEiHbVfYPRpFgP9c"
loAi.InputAddFileId(lcFile_id,"application/json")

loAi.InputAddText("Explain why Hamlet delays taking revenge, using only evidence from the file.")

//  Ask the AI for text output.
llSuccess = loAi.Ask("text")
if (llSuccess = .F.) then
    ? loAi.LastErrorText
    release loAi
    return
endif

//  Get the text response.
loSbResponse = createobject("CkStringBuilder")
loAi.GetOutputTextSb(loSbResponse)
? loSbResponse.GetAsString()


release loAi
release loSbResponse