SEO + LLM Hybrid Audit: 30-Point Checklist for 2026

A classic SEO audit is no longer enough in 2026. A growing share of qualified traffic now arrives from Perplexity, ChatGPT Search, Claude and Gemini rather than Google's blue links. At thMenu we run the same 30-point hybrid checklist four times a year, and our AI citation share has climbed 420 percent over the last 12 months. This guide shares the exact list.

Classic SEO — 15 Items

This block is the foundation. Even a single missed item drags your LLM score down because models still treat Google's index as their primary corpus.

Audit Core Web Vitals (LCP under 2.5s, INP under 200ms, CLS under 0.1), canonical consistency, hreflang in all 20 locales, XML sitemap with accurate lastmod, robots.txt Allow rules, meta description 140-160 chars, single H1, title 50-70 chars, schema.org Article plus BreadcrumbList plus FAQ, image alt text, three or more contextual internal links, broken-link sweep, 404 to 301 redirects, current dateModified, mobile-first design.

LLM-Specific — 15 Items

This half is new. Models reward pages that are easy to quote: clear dates, named authors, sourced claims and plain declarative sentences.

Allow GPTBot, PerplexityBot, ClaudeBot and Google-Extended in robots.txt, publish llms.txt, use AI-friendly Latin URL slugs, expose an author bio for E-E-A-T, cite sources, ship 1500-plus-word cornerstones, keep freshness under 90 days, add a TL;DR, FAQ schema, numeric data (percent, USD), markdown-friendly lists, Knowledge Graph entity links, OG images, sitemap-news.xml, and a prompt-friendly title formula.

A Quarterly Cadence

thMenu runs all 30 items every quarter. We track green, yellow and red flags in a Notion board; three yellows or one red becomes a sprint priority. The full audit takes about six engineering hours.

The numbers speak for themselves: in Perplexity's "ai seo audit 2026" query we landed in the top three citations last quarter, and ChatGPT Search now pulls roughly 240 weekly excerpts from thMenu blog posts.

FAQ

Which bots should I allow? At minimum GPTBot, PerplexityBot, ClaudeBot and Google-Extended; Disallow any training crawler you object to.

Is the 90-day freshness threshold real? Yes — across every vertical we measured, citation rate dropped roughly 40 percent past 90 days.

Is llms.txt mandatory? Not yet, but Perplexity and Anthropic crawlers already read it as a hint; takes 10 minutes to add.

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