# Anthropic is watermarking text generated by Claude to comply with EU law

- URL: https://talkfuse.com/story/anthropic-is-watermarking-text-generated-by-claude-to-comply-with-eu-law/
- Published: 2026-08-15T18:08:36+00:00
- Original publisher: Engadget
- Original article: https://www.engadget.com/2237691/anthropic-watermarking-text-generated-by-claude/
- Topics: AI, Europe, Technology, World

## Key points

- Anthropic will invisibly watermark Claude text to meet EU transparency rules.
- Detection indicates likely Claude involvement, not necessarily full authorship.
- The watermarking rollout applies globally, including image metadata.

## Summary

Anthropic is introducing invisible watermarking for Claude-generated text to meet the European Union’s new AI transparency rules. The system is intended to let authorised parties identify likely Claude involvement without visibly altering writing, adding hidden characters or reducing output quality.

Claude will use a secret key to guide otherwise plausible word choices, creating a detectable pattern based on Google DeepMind’s SynthID-Text approach. Anthropic plans an API for checking text, though short passages, light edits and exact-output code may be difficult or impossible to identify; it will also label Claude-generated images through cryptographically signed metadata. Watermarking will apply globally to outputs from models released after 2 August, with older models to follow.

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