Opus 5.5 vs GPT 5.6: both launch on Netlify, tested head-to-head on one generative UI prompt
thisiskp_ · x · 2026-09-24
Anthropic's Opus 5.5 and OpenAI's GPT 5.6 went live on Netlify the same day. Netlify founder Matt Biilmann ran both through Agent Runners with the same prompt — "Build a site about hats" asking for interactive, LLM-driven generative UI with wild colors and 3D effects — to see which pops most. KP highlights it as his new model eval; results in the original thread.
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