Take the same pretrained checkpoint and turn it into an assistant. What changes when you ask it about its own feelings, thoughts, flaws, and inner experience? We tested this using 67 matched base/post-trained model pairs from 11 organizations, as part of a larger study of 206 open-weight models. We put the model-level results into an interactive explorer: https://hplisiecki.github.io/Pinocchio-Inventory/ It may be more interesting to explore it before reading our interpretation. Pick a...