DIRECTIVE · Google

Google-Extended

Gemini training opt-out (directive only)

A robots.txt token Google introduced in September 2023. Sites that include Disallow: / for it opt out of having Googlebot-fetched content used to train Gemini, Vertex AI, and Google's broader generative AI stack — while keeping their Google Search visibility.

Specs

VendorGoogle
CategoryDIRECTIVE
robots.txt tokenGoogle-Extended
Renders JavaScript—
Honors robots.txtn/a

User-Agent string

(not a crawler — robots.txt directive)

Considerations

  • Not an active crawler — you will never see Google-Extended/1.0 in your logs.
  • Only meaningful in combination with Googlebot. Blocking only Google-Extended (while keeping Googlebot allowed) produces the intended search-yes-training-no outcome.

robots.txt recipe

User-agent: Googlebot
Allow: /

User-agent: Google-Extended
Disallow: /
Related bots: Googlebot · Applebot-Extended

Sources: Google · Google-Extended documentation

← Back to directory