---
format: "aidr-story-markdown/v1"
id: "122a809fef37506ea42cd3fd08b6ab32b422a8f53e6eca21366ca01ee24da994"
canonical_url: "https://aidr.today/122a809f?lang=en"
title: "Anthropic's text watermark is easy to bypass on several older Claude models"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-11-04T19:03:55.000Z"
category: "Tools"
topics: ["anthropic","regulation","devtools"]
source_urls: ["https://the-decoder.com/anthropics-text-watermark-is-easy-to-bypass-on-several-older-claude-models/"]
summary: "Anthropic is adding text watermarks to four additional Claude models before the EU AI Act's December deadline, though older models such as Claude Opus 4.6 and Sonnet 4.6 allow API users to disable the watermark by adjusting a single sampling parameter, prompting a compliance warning from the company."
---

# Anthropic's text watermark is easy to bypass on several older Claude models

> [Open the canonical story](<https://aidr.today/122a809f?lang=en>)

**Published:** 2026-11-04T19:03:55.000Z
**Category:** Tools
**Topics:** anthropic, regulation, devtools

## Summary

Anthropic is adding text watermarks to four additional Claude models before the EU AI Act's December deadline, though older models such as Claude Opus 4\.6 and Sonnet 4\.6 allow API users to disable the watermark by adjusting a single sampling parameter, prompting a compliance warning from the company\.

## Sources

- [Story source](<https://the-decoder.com/anthropics-text-watermark-is-easy-to-bypass-on-several-older-claude-models/>)