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According to the latest update, it’s about to get much easier to spot AI-generated text, with Anthropic announcing that invisible AI watermarks will soon be added to all Claude-created content.
In a fresh development, the fresh policy, which is mandated by the European Union’s AI Act, will apply to any text or files that were created or otherwise touched by Claude, including computer code, publisher reports, or cover letters to potential employers.
In a fresh development, in a recently published support page, Anthropic says that fresh Claude models launched in the EU on or after August 2, 2026 will support adding watermarks to the content they create or edit, and that it’s working to add watermarking abilities to previously launched Claude models.
In a fresh development, the watermarking mandate stems from the EU AI Act, which includes a provision boosting the transparency of content that was created or “processed” by AI.
Industry observers note that anthropic says it will deploy Claude’s watermarking abilities worldwide and across all Claude products, including Claude Cowork, Claude Code, and the Claude API, to comply with the law.
According to the latest update, when it comes to marking text, Anthropic says a “supported” Claude model “weaves an imperceptible watermark into the text itself,” and that the mark will remain present after the text is copied and pasted, or even after “some” editing.
As part of the ongoing story, meanwhile, Claude will attach “provenance” metadata to certain files it creates, including SVG, PNG, and JPG files.
The report highlights that anthropic says it plans on releasing tools that allow anyone to detect the watermarks, with details on those tools slated to arrive in “forthcoming” announcements.
According to the latest update, for example, human-written text that’s later edited by Claude will also get a watermark. The presence of a Claude watermark doesn’t necessarily mean the content was originally created by Claude, Anthropic points out.
In a fresh development, there may also be cases where Claude-touched content isn’t watermarked, such as when the content is “heavily” edited, too short, or produced by a Claude model that doesn’t yet support watermarking.
In a fresh development, it’s worth noting that the EU AI Act applies to any AI providers operating in the European Union.
Industry observers note that but while those firms have signaled their intentions to comply with the EU AI Act, they’ve stopped short of detailing their own watermarking plans for AI-generated text. Both Google and Meta have pledged to sign the act, while ChatGPT maker OpenAI says it will take a “layered approach” to the act’s transparency provisions.
The report highlights that food for thought. In any showcase, news of Claude’s forthcoming watermarks means a) it will soon get much easier to detect Claude-created or “processed” text, and b) it will also be much easier for others to spot text that you’ve created with Claude.
As part of the ongoing story, his coverage of artificial intelligence interrogates the most recent LLMs, and how they can be used at work and at home to be best prepared for the AI revolution. “AI is going to change our lives sooner than we think,” Ben writes. “Our best way to adapt is by using it every day.” Ben has been a PCWorld author since 2014, and has covered everything from laptops to security cameras before launching PCWorld’s AI beat. Ben's articles have also appeared in PC Magazine, TIME, Wired, CNET, Men's Fitness, Mobile Magazine, and more. Ben holds a master's degree in English literature. Ben has been writing about consumer technology for more than 20 years, and now focuses his reporting on AI as it relates to the basic human experience.