The AI tool called "Gim Summari AI" is a free Chrome extension that uses ChatGPT to summarize articles. It works on Chromium-based browsers like Chrome, Brave, and Edge. The tool is privacy-friendly and does not collect user data. Users can install the extension from the Chrome Web Store and generate summaries either by hitting the summary button or setting a keyboard shortcut. The tool uses a machine learning model that emulates human writing.