Letters Abroad: language learning through AI pen-pal letters

Opus 5.5 spent about 90 minutes and roughly $26 of API credit building an explorable optics lab where moving the focus ring shifts the glass elements and the sharp plane.

An explorable rocket engine where you cut it open, trace oxygen and methane through the turbopumps and throttle it, generated by Opus 5.5 as an explainer.

Industrial software redesigned so you manage warehouses as if playing a strategy game, built with Opus 5.5 to show it needn't look like enterprise software.

Source for a music video made by Opus 5.5 on launch day, rendered from code rather than any video model; it drew thousands of stars as a showcase of the model's music-video skill.