Noesion Radarnoesion.ai
Release2026-08-17

Anthropic said future Claude models will embed a hidden statistical pattern in generated text so that its involvement in writing can later be estimated, applied worldwide because it cannot yet be limited to Europe. The change follows EU transparency rules on marking AI-generated content that other providers are also adopting. The mark carries no user or organisation information, does not change output quality or price, and is weak or absent on short text, factual passages, light proofreading and code.

What changed

Claude's text output carried no marking that could indicate machine authorship.

What it unlocks

Checking whether a long passage was likely written by Claude, once the detection service opens.

  • EU marking rules apply from 2 August 2026
  • ~190 signatories to the Code of Practice
  • Code of Practice signed July 2026

What you need to act on it

  • a future Claude model
  • the planned detection API for checking text

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