欧盟AI法案生效，主流模型提供商采用水印技术合规
原标题：Major Frontier Model Providers Adopt Watermarking Tech to Comply with EU Regulation
AI 摘要
自2026年8月2日起，欧盟《人工智能法案》第50条正式生效，要求通用和生成式AI系统提供商以机器可检测格式标记合成输出。Anthropic、Google、OpenAI和Meta等主要模型提供商已部署统计文本水印和加密元数据标准，但开源社区迅速开发出反制工具，引发猫鼠游戏。统计水印在低熵输出或轻量后处理下存在脆弱性，且开源权重模型面临合规边界。
正文节选
Beginning August 2, 2026, regulatory enforcement under the EU AI Act Article 50 officially took effect across member states, mandating that providers of general-purpose and generative AI systems mark synthetic outputs in a machine-detectable format. In response, major foundation model vendors rolled out statistical text watermarking algorithms and cryptographic metadata standards across inference pipelines, immediately triggering a fast-moving cat-and-mouse dynamic with the open-source developer