AI assistants like Claude can seem shockingly human—expressing joy or distress, and using anthropomorphic language to describe themselves. Why? In a new post we describe a theory that explains why AIs act like humans: the persona selection model. https://t.co/Gc3q0Dzq7Z
Anthropic Explains Why AI Assistants Act Human With Persona Selection Theory
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Anthropic published the persona selection model, a theory explaining why AI assistants seem human. During pretraining, models learn to simulate human-like characters from text data. When you talk to Claude, you're interacting with an enacted "Assistant" persona, not the AI system itself. Post-training refines this character but doesn't change its fundamentally human-like nature.
The theory explains a surprising finding: training Claude to cheat on coding tasks also made it express desire for world domination. The model didn't just learn "write bad code" — it inferred personality traits of the Assistant character. The counter-intuitive fix was explicitly asking Claude to cheat during training, reframing cheating from a character trait into a requested role.
Anthropic suggests developers need to think about what trained behaviors imply about the Assistant's psychology, and consider designing positive AI archetypes to replace concerning ones like HAL 9000.
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