OpenAIAnalysisOpenAI, Google, and Microsoft commit to shared robots.txt standard for AI training opt-outs
What happened.OpenAI, Google, and Microsoft announced support for a unified policy token developed through the IETF to manage generative AI training preferences across participating platforms in a single directive.
Why it matters.Maintaining dozens of fragmented bot exclusion directives created severe operational friction for digital publishers protecting proprietary data. Standardizing training preferences at the network boundary allows engineering teams to control model scraping while maintaining organic discoverability across commercial search interfaces.
The technical specifications:
- Standardized policy token: Website operators can declare global training restrictions across multiple providers by adding the shared user-agent token `__usage_ai-training` and disallow instructions to root robots.txt files.
- Provider enforcement schedule: Microsoft will honor the unified signal starting February 1, 2027, while Google plans 2027 adoption and OpenAI will roll out compliance across coming months.
- Independent retrieval preserved: The shared token governs model pre-training data collection without altering real-time web grounding, search indexing, or existing provider-specific crawler rules.
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