Anthropic Reveals Technical Details Behind Claude Text Watermarking System

Anthropic has provided more details about how it will implement invisible watermarks in text generated by Claude. The company uses SynthID-Text, an open-source watermarking technology from Google DeepMind, which embeds detectable patterns through word probability manipulation. This feature, combined with C2PA support for images, aims to satisfy European Union AI Act requirements mandating machine-readable markers on synthetic content including audio, video, images, and text.