Google-Extended
Google-Extended is a robots.txt setting that tells Google whether content it crawls from your site may be used for Gemini. It covers training future Gemini models and grounding, which means handing Gemini pages from Google's search index when someone asks a question. Google says it doesn't change whether your site appears in Google Search or how it ranks.
Source: Google Crawling Infrastructure, Google's common crawlers (updated October 15, 2026), Google-Extended, checked October 29, 2026
What Google-Extended means for your business
There's no Google-Extended bot. Google crawls with its usual crawlers, and Google-Extended is only a name in robots.txt that says what that content may be used for, so you won't find it in your server logs.
The setting covers Gemini apps and Google's Vertex AI tools for developers. For Google Search, including AI Overviews and AI Mode, Google's guide points to other controls: nosnippet, data-nosnippet, max-snippet and noindex.
Blocking it is a trade. It keeps your pages out of future Gemini training, and also out of the pages Gemini apps can be handed when someone asks a question your pages answer. Whichever way you go, we'd check that the rule names Google-Extended alone, so Googlebot keeps its access.
If you're not sure what your robots.txt allows or blocks for AI tools, going through it with you line by line is where we'd start.
Last reviewed October 29, 2026. All terms
How AI answers it today
On October 29, 2026, Google's AI Overview matched Google's crawler page and cited it, Google's announcement post, AI search tool blogs and an SEO consultant. ChatGPT matched Google's page and cited it, and both noted Google-Extended isn't a separate crawler.
Our run through ChatGPT and Google's AI Overview, October 29, 2026. A sample, not what every buyer sees.
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