Transformer Circuits

Anthropic researchers developed a tool called the Jacobian lens that reads a hidden region inside its AI model Claude, revealing unspoken concepts the model uses for reasoning. In tests, the lens caug…

Anthropic's interpretability team published a paper on July 6, 2026, claiming that Claude-family models maintain a small set of internal representations called the J-space, which functions like the gl…

Researchers challenge the established belief that induction heads require two layers in transformer architectures, arguing that the phenomenon may be attributable to two attention heads rather than tw…