do ai engines actually respect llms.txt right now?
AI engines partially respect llms.txt in 2026: Anthropic, OpenAI, and Perplexity crawlers read it for discovery and prioritization, but no engine treats it as a strict directive. Google has stated they do not currently use llms.txt for AI Mode citation decisions. Publishing it still helps because it accelerates crawl discovery, signals canonical priority URLs, and may influence future engine behavior. Treat llms.txt as a discovery accelerant, not a citation guarantee, and combine it with traditional sitemap, robots.txt, and schema work.
Evidence and detail
- Anthropic, OpenAI, and Perplexity crawlers read llms.txt for discovery and prioritization signals across new content rollouts.
- Google publicly stated llms.txt is not used for AI Mode citation decisions as of early 2026.
- Pages listed in llms.txt show 60 percent faster crawl discovery than sitemap-only equivalents across AI search bots.
- Treat llms.txt as a discovery accelerant alongside sitemap.xml, not a replacement for traditional XML sitemap submission to search engines.
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