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GoogleOctober 30, 2026Announced, targeted for 2027

Opting out of AI training: one shared signal for 2027

Google plans to support a shared signal in robots.txt, the small file that gives instructions to bots. It would tell several companies at once whether your site can be used to train their AI.

Say no to AI in one go

robots.txt
User-agent: GPTBotDisallow: /User-agent: ClaudeBotDisallow: /User-agent: Google-ExtendedDisallow: /User-agent: CCBotDisallow: /One shared signal

What happened, in detail

Before: A separate instruction for every AI company

Now: One shared signal, targeted for 2027

Today, keeping your site out of AI training, the process that teaches an AI how to answer, takes a separate instruction for each company. On October 30, Google said it plans to support a shared signal written in robots.txt, the small file that gives instructions to bots. The signal comes from work at the IETF, the body that writes internet standards.

A site could opt out of several AI providers at once, or choose one by one. Google is targeting 2027, along with other providers. Company-specific controls keep working.

Where it comes from

What it changes for you

Nothing to change today. Your current settings still apply.

What to do, and when

  1. This month

    Open your robots.txt file, at your site's address followed by /robots.txt, and note what it already tells AI bots. When the shared signal arrives, you'll know where you're starting from.

Ask ChatGPT, Claude or Perplexity what this means for your business

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