Lua Requires Chilkat v11.2.0+

Multimodal Input: File Data

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Demonstrates sending a request that includes both text and PDF file data for the AI to analyze.

Note: At the time of writing this example, xAI, Perplexity, and DeepSeek do not have the ability to accept non-image multimodal data or URLs.

Lua

local chilkat = require("chilkat")

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

local ai = chilkat.Ai.new()

-- The provider can be "openai", "google", or "claude".
-- At the time of writing this example, "deepseek", "xai", and "perplexity" do not have the ability to process non-image multimodal inputs.
-- Support for additional providers will be added in future versions of Chilkat.
ai.provider = "claude"

-- Use your provider's API key.
ai.api_key = "MY_API_KEY"

-- Choose a model.
ai.model = "claude-opus-5"

-- Add both text input, and PDF file data.
ai:input_add_text("What is in this file?")

local bd = chilkat.BinData.new()
-- We're passing a relative local file path here.. (relative the the app's current working directory)
local success = bd:load_file("qa_data/pdf/shakespeare.pdf")
if not success then
    print(bd.last_error_text)
    return
end

-- Provide the filename in the 1st argument.  The file extension is important to indicate the type of file.
ai:input_add_file_data("shakespeare.pdf", bd, "")

-- Ask the AI for text output.
success = ai:ask("text")
if not success then
    print(ai.last_error_text)
    return
end

-- Get the text response.
local sbResponse = chilkat.StringBuilder.new()
ai:get_output_text_sb(sbResponse)
print(sbResponse:get_as_string())

-- -------------------------------------------------------------
-- The response is in markdown format.
-- Also see Markdown to HTML Conversion Examples.
-- -------------------------------------------------------------

-- Sample output:

-- This PDF file contains a famous quote from William Shakespeare's "Romeo and Juliet". The quote appears twice on the page:
--
-- "These violent delights have violent ends
-- And in their triumph die, like fire and powder,
-- Which as they kiss consume. The sweetest honey
-- Is loathsome in his own deliciousness
-- And in the taste confounds the appetite.
-- Therefore love moderately; long love doth so;
-- Too swift arrives as tardy as too slow."
--
-- The file also includes a portrait image of William Shakespeare. This particular quote is spoken by Friar Lawrence in the play, warning about the dangers of passionate,
-- immoderate love - suggesting that love that burns too intensely tends to burn out quickly, just as fire and gunpowder consume each other when they meet.