The new model, called Fable 5, has capabilities that “exceed those of every model we’ve previously made generally available,” according to Anthropic.

Anthropic has released a full version of its cybersecurity-centric Claude Mythos model—along with a safer version for the general public.

Anthropic first announced Mythos in April, which it called a "step change" in capabilities, but opted to tightly control its rollout.

‘Fable 5’ is the same system as controversial Mythos but comes with safeguards

Company also changes data retention policy

Company also changes data retention policy