# Google plans to support shared AIPREF AI training opt-out in robots.txt

Published: 2026-10-30T16:31:29.174Z · Source: Google Search Central Blog (https://developers.google.com/search/blog/2026/10/ai-training-control)
Second source: Google common crawlers list (https://developers.google.com/crawling/docs/crawlers-fetchers/google-common-crawlers)
Source date: 2026-10-30
Flags: announced plan — support not yet live; spotted via documentation change
Entities: google, gemini

Google said on October 30 that it plans to support a shared AI training control in robots.txt, based on the IETF's AIPREF working group, in 2027 and alongside other AI providers (per the Google Search Central Blog). A site that uses the shared "policy token" to opt out of training, and does not name Google-Extended, would be treated as if it had disallowed Google-Extended. Google says existing company-specific controls will keep working beside the shared signal.

Google's crawler documentation, changed the same day, adds a note that the company intends to support the signal (user-agent: usage_ai-training) in early 2027. Google adds that sites which explicitly allow Google-Extended stay eligible to appear in Gemini Apps responses through grounding. The post gives no date for the other providers it expects to join and names none.

Why it matters: Google adopting the IETF's training definition, even as a plan for 2027, is the first sign a major engine will honor one robots.txt signal that other AI providers can also read, after a record showing almost no sites using the IETF vocabulary.

## What this answers

**Will Google support the IETF's shared AI training opt-out in robots.txt?**

Yes. Google said on October 30 that it plans to support a shared AI training control in robots.txt, based on the IETF's AIPREF work, and aims to do so alongside other AI providers in 2027. Its crawler documentation says early 2027.

**Does a shared robots.txt AI training opt-out replace Google-Extended?**

No. Google says existing company-specific controls keep working alongside it. If a site opts out of training with the shared token and does not name Google-Extended, Google plans to treat that as a Google-Extended disallow.


Canonical: https://anythingengineoptimization.com/item/2026-10-30-google-plans-to-support-shared-aipref-ai-training-opt-out-in-robots/
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