Anthropic · Status at source date: Newsletter archive
Claude output now carries an invisible watermark
Text generated by Claude models released from 2 August includes an embedded watermark designed to accompany the text, as part of Anthropic's commitments under the EU AI Act's Article 50(2) transparency Code of Practice. Within a day, an open-source "watermarks-remover" tool appeared claiming to strip such marks from Claude, Gemini, and OpenAI output.
Why it matters for advertisers
For you, this means AI-generated copy is, in principle, detectable even when pasted onward, so treat client-facing AI text as labelled and disclose accordingly.
Perspective from the original PMC newsletter.Sources & contributor credit
- Newsletter coverage · Paid Media Collective newsletter
Original newsletter text, contributor labels and media for this update.
- Source referenced in newsletterLinkedIn
Linked from the original newsletter. The source publication date has not been independently confirmed.
Original creator unverified
The names below are source credits. The original creator and first-reporting priority have not yet been independently verified.
Attribution evidence and limitations
Full attribution review pending.
A source link alone does not establish original authorship.
Original image and video creators have not yet been verified.
- Published on this site
This update reflects the dated source reporting. Availability may have changed. Further coverage of this same development will be added to this page.
Original newsletter text and archive evidence
Claude output now carries an invisible watermark
Text generated by Claude models released from 2 August includes an embedded watermark designed to accompany the text, as part of Anthropic's commitments under the EU AI Act's Article 50(2) transparency Code of Practice. Within a day, an open-source "watermarks-remover" tool appeared claiming to strip such marks from Claude, Gemini, and OpenAI output. For you, this means AI-generated copy is, in principle, detectable even when pasted onward, so treat client-facing AI text as labelled and disclose accordingly.
Source captured . No explicit first-contributor label was provided for this update.
