Models/press release/2026-10-31

Anthropic extends invisible text watermarking to older Claude models

Anthropic announced it is expanding its invisible text watermarking technology to older versions of its Claude models, with the rollout beginning on November 3. While this initiative aims to improve content provenance, The Decoder specifically noted a loophole affecting two older Claude models. This information is based on Anthropic's own announcement.

3 articles from 3 outlets covered this story. The underlying claim is sourced from a press release.

What do all outlets agree on?

3 outlets covered “Anthropic extends invisible text watermarking to older Claude models”. All of them report the following:

  • Anthropic is extending text watermarking
  • The watermarking is invisible
  • It applies to older Claude models
  • The rollout begins November 3

Which outlets covered this?

All 3 articles found on this story, grouped by the stance of the piece. Every link goes to the original publisher.

What related stories are there?

Which companies does this involve?

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