llms.txt Explained: Why It Doesn't Work (Yet) and What To Do Instead

llms.txt proposes a plain-text file at your site root that summarizes your content for large language models to read instead of crawling your whole site — a sitemap.xml equivalent aimed at LLMs rather than search engines. It's a reasonable idea. The problem is adoption.

As of August 2026, no major AI provider has confirmed they actually consume llms.txt for retrieval or citation. Google's Search Relations team (Gary Illyes) has stated directly that Google has no plans to support it. Independent analyses — including a study spanning roughly 300,000 domains — have found no measurable correlation between having an llms.txt file and how often a site gets cited in AI answers.

So should you have one?

There's no real downside — it's a small static file, and areyoufindable.com keeps one. But treat it as speculative future-proofing, not a ranking lever, and don't let "we shipped llms.txt" substitute for the things that demonstrably matter today: allowing the right crawlers in robots.txt, real structured data, and content an AI's live search tool can actually fetch and parse. See the full GEO guide for the prioritized list.