Must-read research by Anthropic.

Here is the simple explanation and why this is a big deal.

We suspect LLMs perform "internal reasoning". But little is known or do good methods exist to understand it.

Anthropic claims that J-Space （which differs from chain-of-thought or scratchpad）， emerged on its own through training and provides a window into how Claude "reasons" internally.

In other words， this shows that Claude has a sort of internal workspace where information gets held， combined， and passed between different parts of the model. They can read from it， and they can steer the model by changing it.