Felt dot character: Sol vs Opus in Three.js

Same prompt run five times at low, medium, high, xhigh and max to show what extra reasoning effort changes in a Three.js-style scene.

Coding tests of Sol released two days after Sonnet 5.5, noting the odd behaviours seen while building with it.

Official summary of the Intelligence Index result, with pricing and cache-read changes.

Follow-up head-to-head with the creator reporting a clear winner after repeated trials.