Pangram Study: 41 Percent of Long LinkedIn Posts Are AI-Written

Pangram, a company specializing in detecting AI-generated text, has published findings from a two-month analysis revealing the scale of AI content flooding major social platforms. Rather than estimating the number of bots, the researchers passively scanned users' screens during their everyday browsing, offering a picture of the content people actually encounter.

How the study was conducted

Pangram used a Chrome browser extension, voluntarily installed by users who agreed to share data about the content they viewed. This let researchers measure not a hypothetical count of automated accounts, but the real exposure of ordinary internet users to machine-generated content during normal platform use. The estimated false-positive rate of the detection method is about one in ten thousand.

This hadn't been studied before, how much AI content people actually see - Max Spero, CEO of Pangram

LinkedIn leads in synthetic content

The most surprising results concern LinkedIn, a platform associated with professional communication. Among long posts, over 250 words, 41 percent were written entirely by AI, and when counting content partly assisted by machines too, only 55.2 percent of such posts remain fully human. Among medium-length posts, 50 to 250 words, 30 percent were produced solely by AI.

Pangram's researchers note that the phenomenon runs counter to intuition, one might expect people to write in their own voice more readily in a professional setting, yet it is precisely there that the scale of automation turned out to be highest.

Contrary to what one might expect, people are quite willing to let AI speak on their behalf in professional contexts - from the Pangram blog

X and other platforms

On X the picture looks somewhat different, 25 percent of long posts are fully synthetic, and another 23 percent are posts heavily rewritten with AI help, together amounting to nearly half of long posts containing substantial machine contribution. Reddit and Substack fare considerably better, with roughly 10 percent machine-generated content on each, which researchers attribute to stronger moderation culture and less pressure to publish frequently.

A common thread across all platforms is that AI dominates chiefly in posts that open a discussion or thread, while comments and replies remain mostly human-authored.

What it means for users and companies

For companies and professionals building a personal brand on LinkedIn, the findings raise questions about the credibility of content underlying business or hiring decisions. If nearly half of longer posts on the professional platform are machine-produced, judging the expertise or authenticity of experience described in a post becomes harder for both recruiters and content-recommendation algorithms.

The report's authors stress that their data represents more of a lower bound on the scale of the phenomenon than a complete picture, since it covers only users who use the Pangram extension, not the entire population of internet users.

I think the data generalizes to users outside Pangram, but it's more of a lower bound on the amount of AI content - Max Spero, CEO of Pangram

Sources: Niemal połowa treści na LinkedIn to dzieło maszyn (imagazine.pl), LinkedIn and X Are Flooded With AI Spam, Browsing Data Suggests (404media.co)