Anthropic’s new models will begin watermarking content in the EU, as strict obligations from the bloc’s landmark legislation on AI start taking effect. New transparency rules under the EU AI Act came into force earlier this month and require certain AI systems to tell users when they are interacting with AI and how the content they are consuming is generated or altered by it. The watermarks will only appear when supported Claude models are accessed through cloud partners Amazon Web Services, Google Cloud or Microsoft Foundry, Anthropic said. Anthropic said that it is “working” to enable users and other third parties to detect Claude’s embedded watermarks and provenance metadata, but did not specify how. At times, the model’s watermark may appear on human-generated content if it was processed through Claude for reading or summarising, Anthropic said.