AI-Generated Text Is Getting a Hidden Signature

AI-generated text could soon carry something invisible to readers: a digital marker showing that it was created by AI.

What is changing?

Anthropic plans to introduce watermarking for text generated by Claude. The goal is to make AI-generated content easier to identify.

The development comes as transparency requirements, including those connected to the EU AI Act, are pushing AI providers toward clearer identification of synthetic content.

How does text watermarking work?

Unlike a visible label such as “Generated by AI”, a watermark can be hidden inside the text.

It may use subtle patterns in how an AI chooses and arranges words. Specialized detection tools can then analyze these patterns to estimate whether a text was AI-generated.

Why does it matter?

Better identification of AI content could help with:

• Transparency – showing where content comes from
• Misinformation – identifying potentially synthetic material
• Impersonation – making deceptive AI content harder to hide

Watermarking is not foolproof: rewriting, translating or heavily editing text may weaken the signal.

The bigger trend: AI transparency is increasingly becoming part of the technology itself.

Source: Anthropic's Claude to watermark AI-generated text