Anthropic Shares More Details About How Claude’s New Watermarks Will Work
Anthropic explains how its AI chatbot Claude will use watermarks to identify generated text, addressing user concerns and explaining the watermarking process.
Intelligence analysis by Qwen 2.5 (3B)

AI company Anthropic details how it will implement watermarks in its Claude chatbot to comply with EU regulations, addressing user questions about detection and impact on content quality.
Watermarks are like invisible stickers in text that show it was made by a computer, not a person. Anthropic is putting these stickers on Claude's responses to make sure people know when they're reading something generated by the chatbot, not written by a real person.
Analysis
How Watermarks Work in Claude
Understanding Watermarking
Watermarks are patterns embedded within text that can be detected by specific software. Anthropic uses SynthID-Text, a method outlined by Google DeepMind.
Detection and Removal
Users have asked if watermarks can be removed or hidden through editing. Anthropic states that light edits won't remove the watermark completely, while complete rewrites would likely make it undetectable but could change the text's AI status.
Impact on Claude’s Output
Watermarks do not affect the quality of Claude’s responses; they remain indistinguishable from unwatermarked ones. The company emphasizes that readers will still be able to understand and use the content as intended.
Code vs. Text
Code is expected to have a less detectable watermark compared to text, but in areas where there are choices within code (like comments), watermarks can still be used for identification purposes.
Future of Watermarking
Other major model developers will also implement their own watermarks as part of the same Code of Practice. This ensures consistency and transparency across different AI models.
Key points
- Anthropic uses SynthID-Text for watermarking Claude’s responses
- Watermarks do not impact the quality or readability of Claude's output
- Code is expected to have a less detectable watermark compared to text
Users will still be able to understand and use Claude’s responses even with watermarks, ensuring transparency without compromising usability or quality.
If users try to remove or hide the watermarks through editing, it might make them undetectable but could change the text in ways that affect its AI status. This could lead to some confusion for readers who are not aware of the watermarking process.



