Google, OpenAI, Microsoft back one AI training opt-out
Why it matters
On Oct 30, 2026 Google, OpenAI and Microsoft committed to honor one shared robots.txt policy token, __usage_ai-training, so websites can state a preference against AI training once instead of writing separate rules for each provider's crawler. Google plans to treat an opt-out as a Google-Extended disallow and aims for 2027; Microsoft starts February 1, 2027 and says Bing search eligibility is unchanged; OpenAI says the coming months. The proposal is an individual IETF Internet-Draft written by Anthropic's Kevin Kelley; it is voluntary and does not block crawling.
Read the source: Google Search Central Blog (opens in a new tab)
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