PolicyOpenAI to Watermark ChatGPT Text in EU for ComplianceOpenAI has announced that it will begin watermarking text generated by ChatGPT and Codex in the European Union to comply with the EU AI Act's transparency requirements.Oct 5, 2026 3 min
PolicyAnthropic adds hidden watermarks to Claude outputs for EU complianceAnthropic implements EU-mandated watermarking across Claude products with technical limitationsAug 11, 2026 2 min
PolicyHow AI Watermarking Works Under the EU's New Transparency RulesAI watermarking embeds hidden identifiers in synthetic content to meet EU legal requirements for authenticity tracking. Anthropic's Claude models now implement this for all EU-generated output.Aug 11, 2026 2 min