Pangram: Over a Quarter of Long-Form Social Media Posts Are AI-Generated
A new analysis by Pangram reveals that over a quarter of social media posts exceeding 250 words are now AI-generated. LinkedIn shows the highest proportion of AI content at 41%.
AI-generated content is significantly increasing on social media platforms, with over a quarter of long-form posts being produced by artificial intelligence, according to an analysis by Pangram. The study, released in January, scanned over one million posts across five major social platforms between April and June 2026 and found that more than 25% of texts over 250 words were AI-created.
LinkedIn was identified as the platform most affected by AI content, with 41% of its long-form posts flagged as AI-generated. Despite accounting for only about a third of the total posts scanned, LinkedIn contributed nearly two-thirds of all detected AI content.
On the X platform (formerly Twitter), nearly half of long-form posts were either entirely AI-generated or created with AI assistance. In contrast, Substack had the lowest proportion of AI content at approximately 10%. Replies on Reddit were almost entirely human-written (98% human-created), though AI-generated text appeared more frequently in standalone posts.
Pangram's AI detection model, Pangram 3, demonstrated high accuracy, with a false positive rate of only 0.01% for misclassifying human content as AI-generated. However, the company acknowledged that its ability to identify human-written content might be stronger than its ability to detect AI-generated text, suggesting the actual AI content volume could be even higher.
The analysis did not evaluate the quality of the AI-generated content. LinkedIn has reportedly begun strengthening its governance of AI-generated content on its platform.