Rust Requires Chilkat v11.4.0+

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.

Rust

let _ = false;

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

let ai = chilkat::Ai::new();

// 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.set_provider("openai");

// Use your provider's API key.
ai.set_api_key("MY_API_KEY");

// Choose a model.
ai.set_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.
let file_id = "file-5G2xncrEiHbVfYPRpFgP9c".to_string();
let _ = ai.input_add_file_id(&file_id, "application/json");

let _ = ai.input_add_text("Explain why Hamlet delays taking revenge, using only evidence from the file.");

// Ask the AI for text output.
if ai.ask("text").is_err() {
    println!("{}", ai.last_error_text());
    return;
}

// Get the text response.
let sb_response = chilkat::StringBuilder::new();
let _ = ai.get_output_text_sb(&sb_response);
println!("{}", sb_response.get_as_string().unwrap_or_default());