Texts generated by Claude now carry an invisible watermark — a technical way to verify whether a given text was written by AI. The reason behind this is the new European regulation.
How does the watermark work?
A watermark in a digital document is usually something visible — a logo over an image, a watermarkon a PDF. With AI-generated text, however, the logic is different.
When a model like Claude generates text word by word, there are often several equally good options for the next word. For example, after “the weather today was cold and…” the model might choose either “gloomy” or “cloudy.” Under normal circumstances, which word the model chooses is determined randomly.
The watermark uses precisely these moments of choice. Instead of relying on a purely random generator, it uses a secret key that determines the selection in a predictable way for the holder of that key.
The result is text that looks completely natural to the reader, but when analyzed using the key, the probability that it was generated by Claude can be calculated. There are no hidden characters, no added text, and no changes to the meaning or quality of the content.
What remains unchanged for you?
The key takeaway for businesses producing content with the help of AI: the watermark does not affect the quality, style, or meaning of the text.
It does not add words, increase generation costs, or reveal any information about a specific user, organization, or conversation.
The practical takeaway for companies creating content
For teams like ours, which combine AI tools with editorial and strategic work, this change does not require anything new in our approach.
The content we produce — whether it is entirely written, edited, or simply inspired by AI — continues to be evaluated based on one thing: Is it useful and authentic for the reader?
The watermark is a technical layer of transparency at an industry level, not a signal that you should hide or stop using AI in your workflow.
If you are considering how to integrate AI into your brand’s content in a thoughtful way — without losing its voice and authenticity — we’re here to help.
