I gave every Claude model the exact same prompt since July 2025. 13 models, 14 months, here's the evolution

A user tested 13 Claude models over 14 months, starting in July 2025, by giving each the exact same prompt: "Make me a 3D website that's a kind of video game, with an infinite procedural terrain and a camera that keeps moving forward through it forever." The experiment captured real-time outputs in Chrome, noting that Sonnet 5.5's version included a shader bug where trees did not render.