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-mini"

// 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