Pew: After the advent of ChatGPT, 35% of web page content now shows traces of AI
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20h ago
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Pew stated that in the English web pages released after the launch of ChatGPT, approximately 35% showed obvious signs of AI writing.
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皮尤研究中心最新研究显示,英文互联网内容中的 AI 写作痕迹正在快速增加。研究团队从 Common Crawl 网页档案中抽取约 49 万个英文网页,覆盖 2021 年 1 月至 2026 年 7 月,并用 AI 检测模型 Open Pangram 进行分析。

ChatGPT后占比升至35%

结果显示,在 2026 年 7 月的网页样本中,约 10% 出现明显 AI 写作迹象。若只统计 2022 年 11 月 ChatGPT 上线后发布的页面,这一比例升至 35%。

不同域名差异拉大

研究发现,AI 写作痕迹并非平均分布。.com 域名页面出现相关迹象的比例约为 10%,.edu 和 .gov 均接近 1%,.org 约为 4.6%。皮尤指出,2021 年时,这几类域名的表现还大致接近。

  • .com 页面约 10% 显示 AI 写作迹象
  • .edu 与 .gov 均接近 1%
  • .org 页面约为 4.6%

识别依据来自文本模式

这项研究并不是通过单个词语直接判定内容是否由 AI 撰写,而是根据大规模文本中的统计特征识别。研究提到,破折号使用频率约翻倍,牛津逗号增加 63%,部分常见于 AI 文本的词汇也明显增多。

此外,类似“不是 X,而是 Y”的句式较 2023 年前增加近三倍,不过整体仍不算常见。皮尤同时提醒,检测模型仍可能误判,因此“明显 AI 写作迹象”不等于整篇内容完全由机器生成。

商业网站采用速度更快

研究认为,这种差异与发布流程有关。高校和政府网站通常需要更长的审核周期,而商业网站覆盖新闻、营销和内容农场,更容易大规模采用 AI 辅助写作。

从时间变化看,.com 页面中的 AI 写作迹象比例,已从 2021 年 1 月约 1% 升至 2026 年 1 月的 9.35%。报道还提到,Anthropic 等公司正在推进模型级文本指纹技术,以提高 AI 文本识别准确度。

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