Creator-reported video The history of dinosaurs in under a minute, drawn in JavaScript A 47-second animated history of dinosaurs. The creator says Sonnet 5.5 drew every frame in JavaScript.
The Frontier Brief · Editorial analysis Reviewed 2026-09-29
Original post · hosted by X The source record Creator Kevin Ngo · original X post Model / toolchain Claude Sonnet 5.5 · creator-reported; settings undisclosed Evidence Creator-reported video. Not a controlled comparison. Published / reviewed 2026-09-28 / 2026-09-29 Media Official X embed; no local media copy What to look for Watch the 47-second animation at its source Note the claim: every frame drawn in code Ask for the code before treating it as a template Open source record ↗ (opens in a new tab) Post checked on September 29. Kevin Ngo is also quoted by Anthropic on the Sonnet 5.5 launch page; no code or prompt is published.
What the original shows A short, narrated-style animation that moves through the age of dinosaurs. The creator states that Sonnet 5.5 generated the frames as JavaScript drawing code rather than using a video model.
Supporting documentation ↗ (opens in a new tab) What remains unverified No code, prompt, iteration count or editing details are published. The creator also appears as a quoted early tester on Anthropic’s launch page.
Editorial status: research preview · reviewed 2026-09-29 Back to the showcase ↗