Project
Google DeepMind generative text watermarking approach that modifies next-token sampling to embed a detectable statistical signature.
The Claude watermark survives light editing and dissolves under heavy editing, and its absence proves nothing. Policies that treat it as a verdict are built on a binary that does not exist.
Perspective Coverage
5 publishersReality
Anthropic now embeds a token-free watermark in Claude output across its API, Claude Code and three cloud partners. For content teams that publish Claude drafts, the practical work now sits in disclosure policy and internal records.
Reality
Anthropic now watermarks Claude's text with a version of Google DeepMind's SynthID-Text to meet the EU AI Act's transparency rules. Only a holder of the secret key can measure the mark, a lean in token choice that says little until it spans many tokens.
Reality
Anthropic says it is watermarking Claude text to satisfy the EU AI Act Transparency Code and plans a detection API. The exposure sits with teams shipping generated work as their own.
Perspective Coverage
7 publishersReality
The mark is applied during generation rather than at an interface, so anything built on the Claude Platform API returns marked text by default. Reading the mark stays behind a private detection API with a registration list.
Reality
Anthropic's text mark is a keyed scheme no third party can test. The C2PA credentials on images since 11 August are checkable by anyone, until a PDF generator strips them.
Reality
The mark lives inside token sampling, is invisible to readers, and needs a key to read. Provenance testing just became an operational question for DLP and insider-risk teams.
Reality