研究显示LinkedIn是长文AI生成内容之王，41%帖子为AI撰写
LinkedIn is the undisputed king of long-form AI slop, according to a study spanning five platforms
Pangram分析显示，2026年4月至6月期间，五个平台超百万条帖子中，每四篇超过250字的社交媒体帖子就有一篇是AI生成的。LinkedIn以41%的长文AI生成率位居榜首，其帖子数量仅占扫描总量的三分之一，却贡献了近三分之二的已检测AI内容。X/Twitter上近一半长文为AI生成或辅助生成，Substack的AI生成率最低（约10%），Reddit回复帖98%为人类撰写。Pangram声称其检测模型误报率为0.01%，但实际AI比例可能更高。
One in four social media posts over 250 words is AI-generated, according to a Pangram analysis. LinkedIn tops the list with 41 percent of long-form posts flagged as AI-written. The platform made up only a third of all posts scanned but accounted for nearly two-thirds of all detected AI content. On X/Twitter, close to half of long-form articles were AI-generated or AI-assisted. Substack had the lowest long-form AI rate at around 10 percent. Reddit replies were 98 percent human-written, but standalone posts contained AI text far more often.
The data comes from Pangram's Chrome extension, which scanned over one million posts across five platforms between April and June 2026. The company claims its Pangram 3 detection model has a false positive rate of 0.01 percent, but it's likely better at identifying human-written content than AI-generated content, so the real AI rate could be even higher. The study makes no claims about content quality, but LinkedIn itself seems to feel the pressure and has already started cracking down on AI-generated posts.
来源：The Decoder：AI News · the-decoder.com