ProductsOct 31, 20261 min readGoogle, Microsoft, OpenAI and Anthropic back one AI training opt-out - PPC Land0SaveShareContentsWhy it mattersTopicsCategoryProductsIndustry DomainThe Core DevelopmentGoogle, Microsoft, OpenAI and Anthropic back one AI training opt-out PPC LandWhy it mattersGoogle, Microsoft, OpenAI and Anthropic back one AI training opt-out PPC Land Reported by Google News — Anthropic / Claude on October 31, 2026.Topic dossiers Anthropic & Claude OpenAI