REX

REX is a coding agent that runs your whole Windows PC. Say what you need — by voice or text — and it writes and runs code, works the applications already on your PC, and checks the result before it says done. Not just the terminal: the whole computer. What REX does - Ships a site and proves it live: builds, deploys, opens the dashboard in Chrome, and reads the uptime before it reports. - Answers from the web: opens three pricing pages, reads the plans, works out ten seats, and answers with the sources. - Builds and tests a feature: reads the code in Visual Studio Code, writes the export, wires the button, runs the tests, and reports green. - Puts a folder of invoices in order: reads each file, renames all 42 by supplier and date, and files them in one folder in File Explorer. - Sets up a laptop: opens Windows Settings, turns on dark mode, sets focus hours, and adds the office printer. Measured, not claimed REX is run on Windows Agent Arena, a public benchmark, on a real Windows PC, and scored by the benchmark's own evaluator. - Gemini 3.8 Flash: 88% through REX; 59.0% as its maker reports on OSWorld 2.0. - GPT-6 Astra: 99% through REX; 72.6% as its maker reports on OSWorld 2.0. Through REX, against a plain screenshot-and-click loop run with the same model on the same jobs, per finished job: Gemini 3.8 Flash 12× faster, 11× fewer tokens, 92% cheaper; GPT-6 Astra 1.3× faster, 1.2× fewer tokens, 57% cheaper. Precision (jobs REX called done that were done) 87% and 99%; reliability (jobs that ran to a finish) 94% and 99%; jobs of more than twenty steps finished 86% and 99% of the time, against the loop's 17% and 50%. Get REX Windows 10 or later, 64-bit. Per-user install, no administrator rights. REX runs on the AI model you choose, so it needs a connection and a ClassEve account. https://classeve.com/rex