Supporting a shared AI training control for websites

Google announced plans to support a shared AI training control in robots.txt, based on work from the IETF AIPREF working group, letting website owners set AI training preferences across multiple providers with a single policy token. If a site uses the token to opt out and does not explicitly specify Google-Extended, Google plans to treat that as disallowing Google-Extended, while existing company-specific controls continue to function alongside the joint signal. Google aims to support the new control with other AI providers in 2027.