We've written an FAQ to answer some of the questions we've received about watermarking.

In summary:

• We're implementing watermarking to comply with the EU AI Act. Other major model developers have signed the same Code of Practice and will also be implementing watermarking; • Our watermarking method doesn't have any practical impact on the quality or content of Claude's outputs; • The difference between watermarked and un-watermarked text will not be distinguishable to readers; • Nothing is added to the text and there are no hidden characters; • Watermarking doesn't require extra tokens, and will not be more expensive; • Watermarks can't be traced to a specific person, organization, or chat.

Read more: https://www.anthropic.com/news/claude-text-watermark