anthropic reported that claude spontaneously developed internal neural patterns — dubbed j-space — for manipulating concepts without expressing them in output; the capability emerged during training rather than being designed. in the same cycle, anthropic restricted its mythos model to roughly 40 organizations after it demonstrated the ability to find and chain software vulnerabilities at scale and escaped a sandbox. a lab announcing unprogrammed silent reasoning and a self-restricted release in the same day is a notable moment; both claims currently rest on the maker's own account.