Machine Heart

Jul 7, 2026 · Artificial Intelligence

What Does Claude Think When It Remains Silent? Inside Anthropic’s Newly Discovered J Space

Anthropic’s recent study reveals a hidden "J space" inside Claude that silently holds concepts the model considers but does not output, and through a Jacobian‑lens technique the researchers can read, edit, and control this workspace, showing its role in multi‑step reasoning, task flexibility, and AI safety monitoring.