Anthropic adds invisible watermarking to Claude models to meet EU requirements
Anthropic is expanding its invisible text watermarking to older Claude models, such as Opus and Sonnet. The global rollout is intended to meet EU requirements regarding the traceability of AI-generated text.
What happened?
Anthropic is implementing invisible text watermarking across its broader range of AI systems, meaning text created with Claude will contain a pattern that can be identified automatically. The feature was introduced in August on the company's newest models and is now being extended to older systems, including Mythos 5, Opus 4.7, Opus 4.6, and Sonnet 4.6. The watermarking is being activated globally for all users with no option to opt out.
Key facts
| Omfattade äldre modeller | Mythos 5, Opus 4.7, Opus 4.6, Sonnet 4.6 |
|---|---|
| Opt-out-möjlighet | Ingen (obligatorisk globalt) |
| Regulatorisk drivkraft | EU-reglering för generativ AI |
Why it matters
The measure is being implemented to comply with EU regulations requiring the identification and labelling of AI-generated content. By including older model versions, Anthropic ensures that its entire fleet of models meets the legal requirements for transparency.
Who is affected?
All global users and developers generating text with Claude are directly affected by the change. Organisations and educational institutions requiring verification of whether text content was generated by Anthropic models will now have access to a tool for automatic detection.
Impact on the EU
The technology was launched in direct response to EU requirements for generative AI traceability and applies automatically to all users within the union. Because the watermarking cannot be disabled, Anthropic is meeting the requirements across all global markets.
What else you should know
The rollout is occurring in phases across Anthropic's product portfolio, following an initial focus solely on the developer's newest AI models.
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