Simon Willison used Claude Opus 5.5 Max via the iPhone app to generate a Three.js spot-the-difference game called "Tree Appreciator," where players compare algorithmically generated trees. The model spent over 3 hours reasoning before producing a polished game with music, animation, and achievements.
Background
Simon Willison is known for experimenting with LLM-powered development tools and has been sharing his findings on AI-assisted coding. This post is part of his ongoing exploration of what modern AI models can generate from natural language prompts.
- Source
- Simon Willison
- Published
- Oct 15, 2026 at 05:23 AM
- Score
- 5.0 / 10