Real-Time Website Redesign in 100 Milliseconds: Jev and Opus 5.5 Reshape Live UI

TypeSafe AI's Jev model, paired with Anthropic's newly released Claude Opus 5.5, can now redesign website sections in real time as users scroll—with layout decisions made in just 100 milliseconds. The demonstration shows a live website where each section of a 2015 hosting site is rebuilt instantly: a visitor pastes a URL, hits start, and watches sections transform as they scroll. Jev, a System One model optimized for fast structured decisions rather than text generation, analyzes the current layout and makes design-decision calls in approximately 0.1 seconds. Opus 5.5 then writes the corresponding TypeScript React (TSX) and CSS code to implement that redesign, and the new section swaps into the page instantly. The combination showcases two complementary AI advances launched within days of each other in September 2026.