Post by Anthropic on X
Anthropic@AnthropicAI
XThe J-space (named after the Jacobian, the mathematical technique we used) is different from Claude’s outputs, or even its “chain of thought” text.
It’s in the model’s internal neural activations, and allows it to think about concepts without writing them down anywhere.
1.4K likes22 repliesPosted Jul 6, 2026