On August 15, 2026, Anthropic revealed the specific mechanism of the new watermark technology for the Claude model. Previously, on August 12, users had expressed dissatisfaction, believing that this watermark function could potentially lead to accidental detection of usage traces in work and classroom environments, thereby causing related controversies. Currently, Anthropic is further explaining the details of this technology in response to public concerns.
SynthID Text proposed by Google DeepMind in 2024Technical source
Transparency code of the EU’s Artificial Intelligence ActName of the regulation
Key entitiesKEY ENTITIES
AnthropicClaudeEU AI ActGoogle DeepMindSynthID
Event frameEVENT FRAME
Regulation
回溯归档across 2 days
Status
Anthropic releases details on the new watermark technology for Claude in response to EU legislation requirements and user concerns
Coverage · reports per dayLANGUAGE SPLIT
Entity relations
Integrated timelineUNIFIED TIMELINE
2026-08-12
Users are dissatisfied with the new watermark technology causing controversy
Anthropic decides to insert invisible code watermarks in outputs to meet EU AI Act requirements; some users believe this mechanism may lead to accidental detection of usage traces in work and classroom environments.
2026-08-15
Anthropic explains the new watermark mechanism for Claude
A blog post explains the use of Google DeepMind SynthID Text technology, with plans to launch a detection API to comply with EU AI Act requirements.
Anthropic 近日决定在 Claude 输出中插入不可见代码水印以标记 AI 生成内容,此举旨在满足欧盟《人工智能法案》透明度准则要求。该政策引发部分用户不满,认为其可能通过数字水印导致学生在作业、记者总结文章等场景中被发现使用 AI。Reddit 上有用户批评该机制对普通用户构成“数字纹身”,并质疑将 Chatbot 视为工具却要求其承担生成责任的不合理性;另有观点指出此举存在双重标准,且未充分考虑用户实际工作流中非直接复制粘贴的情况。
Anthropic 发布博客详解 Claude 新水印机制,采用 Google DeepMind 2024 年提出的 SynthID Text 技术并计划推出检测 API。该水印旨在响应欧盟《人工智能法案》透明度代码要求,使 AI 生成内容可被识别,且不影响输出质量或可读性。针对用户担忧,Anthropic 表示轻度编辑难以完全移除水印,彻底重写则可能使文本不再被视为 AI 生成;仅经 Claude 轻微润色的文本中,因人类作者贡献了绝大部分词汇,水印附着点极少。代码类内容受限于逻辑约束,水印影响极小,仅在注释等存在任意选词处生效。