@kimmonismus: Anthropic says Claude developed a hidden “thinking space” by itself during training. It is called the J-space: a small …
Summary
Anthropic discovered that Claude developed a hidden 'thinking space' (J-space) during training, where silent internal activity represents concepts. This interpretability finding parallels global workspace theory in neuroscience.
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Cached at: 07/06/26, 08:20 PM
Anthropic says Claude developed a hidden “thinking space” by itself during training.
It is called the J-space: a small set of internal patterns that show what concepts Claude has “on its mind,” even when it never says them.
Example: Claude can silently think “spider” to answer “8 legs.” If researchers replace that internal pattern with “ant,” Claude answers “6.”
So this is not just chain-of-thought text. It is silent internal activity.
Anthropic (@AnthropicAI): In neuroscience, global workspace theory holds that thoughts become consciously accessible when they enter a privileged workspace that’s broadcast across the brain.
Using a new interpretability technique, we found something similar in Claude: the J-space.
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