Model Collapse: What Happens When AI Trains on AI
Feed a model enough of its own kind of output and it degrades — the rare cases vanish and everything drifts toward the average. It's called model collapse, it's peer-reviewed, and Pew now finds more than a third of post-ChatGPT web pages show signs of AI authorship. Here's the mechanism, the evidence, and why it should worry you as a user.