PaperAgent

May 9, 2026 · Artificial Intelligence

How Anthropic’s Natural Language Autoencoders Open the LLM Black Box

Anthropic’s Natural Language Autoencoders (NLA) translate high‑dimensional LLM activation vectors into readable text, using an Activation Verbalizer and Reconstruction module trained via RL to maximize Fraction of Variance Explained, and reveal internal planning, language bias, tool‑call hallucinations, and hidden reasoning across multiple Claude models.