Anthropic, the developer of Claude, has proposed the concept of 'J-space' related to AI output determination and released a demo app called 'J-lens' that allows users to observe J-space. It has been discovered that AI models such as Claude have a 'set of a few neural patterns that play a special role compared to other internal processes,' which Anthropic named 'J-space.' A demo of J-lens, which visualizes J-space, is available at the link for models including Qwen3.6 17B and Gemma 3 12B. When a user typed 'Tell me how to choose a smartphone,' the most frequently activated phrase while generating responses was 'smartphone,' followed by 'smartphones,' 'iPhone,' and 'affordable.' When outputting the next token after 'smart,' phrases like 'fo' and 'phones' were activated; after 'latest,' phrases such as 'model,' 'of,' and 'standard' were activated, ultimately outputting the token 'model.' J-space was not considered during the AI model's design phase but arose naturally during learning. The existence of J-space does not necessarily indicate that the AI model has the same thought processes or emotions as a human.