Apps & websites

A book website redone mostly by Opus 5.5

Wharton professor Ethan Mollick had Opus 5.5 rework the website for Mollick's book. The earlier Opus 4.8 version required heavy manual styling; this time the model mostly produced a distinctive static site on its own.

Made with

Opus 5.5, Opus 4.8

Role

Professor at Wharton

Links

co-existence.ai

Posted

25 October 2026

Ethan Mollick@emollick

The website for my book redone with Opus 5.5. The initial version (made with Opus 4.8) required a lot of work to make a distinctive-looking static site. Now Opus mostly did this alone. We have come a long way from generic ClaudeDesign in a very short time. t.co/Ti5jo6ksfI

25 Oct 2026View on X