Anthropic has announced that future Claude models will generate text containing invisible watermarks to help determine whether Claude was involved in creating content.
The system uses a version of Google DeepMind’s SynthID-Text technique, which subtly changes how the model randomly selects among equally suitable words without adding hidden characters or extra tokens.
Anthropic says testing found no meaningful impact on quality, creativity, readability, speed, or cost. The watermark contains no user or organization information. Anthropic is introducing the technology globally to comply with EU AI Act transparency requirements and plans to offer a watermark detection API soon.
