If you’ve ever scrolled through LinkedIn and wondered whether that perfectly polished career story or motivational post was written by a person or an AI, you’re not alone. A new study suggests your suspicion may not be far off. According to research by AI detection startup Pangram, LinkedIn has become the most AI-saturated major social media platform, with more than 40 per cent of its long-form posts identified as fully AI-generated. The findings come as generative AI tools become increasingly common across the internet. Here’s everything you need to know about the report.
Why LinkedIn Tops The AI Content List
According to Pangram’s study, the Microsoft-owned professional networking platform accounted for nearly two-thirds of all posts that its system classified as AI-generated. The company analysed more than one million posts across platforms including LinkedIn, X, Reddit, Medium and Substack.
The report suggests LinkedIn’s own AI-powered writing tools, including the “Enhance post” feature, may have contributed to normalising AI-assisted content creation. As a result, AI-generated posts have become quite common, particularly in long-form updates where users often share career milestones, workplace lessons and industry insights.
However, the researchers also caution against treating AI detection results as absolute proof. They emphasise that these scores should be viewed as indicators, not definitive evidence, especially because AI detectors can sometimes incorrectly flag content written by non-native English speakers.
Reddit Emerges As The Least AI-Heavy Platform
While LinkedIn ranked highest, Reddit sat at the other end of the spectrum. Pangram found that only 4.4 per cent of Reddit content was identified as AI-generated despite it having the largest number of scanned posts in the study.
The report noted that 98.1 per cent of Reddit replies appeared to be written by humans, although around 11.6 per cent of top-level posts were flagged as AI-generated, a figure similar to X (formerly Twitter). Researchers believe Reddit’s anti-spam policies help limit automated AI replies, though they acknowledge the approach is less effective against higher-effort AI-generated posts.
Reflecting on the findings, Pangram CEO and co-founder Max Spero said, “AI writing is now a problem everywhere on social media. This is concerning, but it’s in line with what we’re seeing elsewhere online: researchers estimated that 35% of newly published websites on the open internet were AI-generated or AI-assisted.”
He added, “An internet that is completely flooded with undisclosed AI content is bleak, but we don’t believe it’s inevitable. We hope that by providing transparency to AI-generated content online, we can give internet users back some control of how they spend their attention.”
