This figure doesn't account for offline documents. It also only covers text. Generative AI now produces music, illustrations, software, photographs and increasingly convincing video. The problem is that much of it is becoming difficult to distinguish from human-created work, raising transparency and security concerns.

The European Union's answer to these concerns is regulation. Under Article 50(2) of the EU AI Act, providers of generative AI systems are required to make all generated content detectable as artificially generated or manipulated.

Anthropic, the company behind Claude, has signed the bloc's Code of Practice on Transparency of AI-Generated Content, one of around 190 signatories, and now plans to watermark Claude's output across its ecosystem. According to the company, text will carry an invisible statistical watermark, while supported visual formats (such as PNG, JPG, or SVG) will receive signed metadata noting that Claude was involved.