Persona Cartography: Charting Language Model Personality Traits in Weight Space

Jul 10, 2026

Researchers present a method to decompose and control large language model (LLM) personas using the OCEAN personality framework. By training low-rank adapters to amplify or suppress traits such as neuroticism and agreeableness, they demonstrate monotonic trait control, additive composition of traits, and effects on safety-relevant behaviors like frustration and sycophancy.

Why it matters: This work systematically connects personality measurement, model editing, and safety, enabling more precise behavioral control of LLMs.

Full story at: arXiv AI/ML ↗