Anthropic starts marking all of Claude’s output worldwide as EU transparency rules take effect

This article was published on August 12, 2026 The company has signed the EU AI Act’s Article 50(2) code of practice, committing to machine-readable marks on AI-generated text and images. The rules also reach the businesses that use the tools. Anthropic has begun attaching machine-readable marks to the text and images that its Claude models generate, and will apply them to users worldwide rather than only in Europe, after signing a European Union code of practice tied to new transparency rules that took effect on 2 August 2026. The company confirmed in a support document that it had signed the EU AI Act’s Article 50(2) Code of Practice on Transparency of AI-generated Content, as a provider of both generative AI models and generative AI systems. The step makes Anthropic one of the first large AI developers to set out, in operational terms, how it intends to comply with a law that will eventually require most AI-generated material circulating in the EU to be identifiable as such. The obligations reach further than one company because they divide responsibility between two groups. Providers, the firms that build and supply AI models, must ensure their systems’ output can be recognised