According to the company, the commitment applies to Claude models launched in the EU on or after August 2, 2026, which will support machine-readable marking at launch. As per the company, the transparency measures apply across various platforms and global regions where the models operate. Marks will apply to output from supported Claude models across Claude Platform (API), Claude, Claude Code, Claude Cowork, and Claude Tag, and wherever Claude is offered, worldwide. "Embedded watermarks will apply when supported Claude models are accessed through AWS, Google Cloud, or Microsoft Foundry. The output can carry a Claude mark even if the underlying ideas, text, or data originated from another source," the company clarified.