Demonstrates Chrome's experimental built-in LanguageModel API — checks model availability, streams download progress, creates a session, and runs a prompt. Requires Chrome with the Prompt API flag enabled.

chrome-ai-language-model.js

(
  async () => {
    try {
      // Check if the built-in LLM is available
      const availability = await LanguageModel.availability();
      console.log('availability =', availability);

      // Create a session with download-progress monitoring
      window.browserSession = await LanguageModel.create({
        monitor(m) {
          m.addEventListener('downloadprogress', (e) => {
            const pct = (e.loaded / e.total * 100).toFixed(1);
            console.log(`Downloading: ${pct}%`);
          });
        }
      });

      console.log('session created');

      // Run a prompt against the local model
      const result = await window.browserSession.prompt(
        'What is the color of the sky?'
      );
      console.log(result);

    } catch (e) {
      console.error('Error:', e);
    }
  }
)();