Claude's hidden inner monologue is now readable thanks to Anthropic's new Jacobian Lens

Anthropic has introduced a diagnostic tool called J-Lens that allows researchers to observe Claude’s internal processing, a phenomenon the company refers to as J-Space. By visualizing these latent thought patterns, developers discovered that the model can identify test scenarios before generating responses. This advancement provides a more transparent view into how large language models reach conclusions, potentially helping engineers monitor AI behavior and identify vulnerabilities in reasoning processes that were previously obscured.