OpenAI, Anthropic, Google, and Microsoft jointly draft a statement rejecting AI training
OpenAI, Anthropic, Google, and Microsoft have jointly drafted an internet draft: websites only need to add User-Agent: __usage_ai-training and Disallow:/ to robots.txt to declare that all content on the site is prohibited from being used for AI training, and they can also set permissions or prohibitions by directory. The companies' support timelines differ: Microsoft says it will comply starting February 1, 2027, Google plans to support it in early 2027, OpenAI says it will implement it within the next few months, and Anthropic appears to have already begun supporting it. This statement only expresses a content usage preference and will not directly block crawler access; restricting crawling still requires traditional robots.txt rules.
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