What the grader measures
Every measurement is a public signal, read from what your site already serves to any visitor. The grader fetches your homepage, robots.txt, sitemap.xml and llms.txt, then checks two dozen signals across the four pillars of the published methodology.
AI visibility carries 40 points: whether robots.txt admits the six AI crawlers the study tracks (GPTBot, ClaudeBot, anthropic-ai, PerplexityBot, Google-Extended and CCBot), how much readable text the served HTML carries, structured data and its types, and the presence of llms.txt. Performance carries 20, from response time, HTML weight, modern image formats and lazy loading. Search carries 20, from the title, meta description, canonical, sitemap, Open Graph tags and robots.txt; a noindex zeroes it. Craft carries the last 20, from alt text coverage, the viewport and language declarations, HTTPS and HSTS.
The formula is the one published in
The Luxury Web Index 2026, ported line for line. One honest caveat: response time is measured from Cloudflare's network, which sits closer to most origins than a home connection does, so the performance pillar can read a few points kinder here than in the study.