Anthropic says its new Fable 5 AI model can handle long-running tasks and agents. The tradeoff: higher costs, tighter safeguards and usage limits.

Anthropic launches Mythos with Fable 5. Six capabilities for agents: 80.3% code reasoning, extended thinking, autonomy. Vision, science acceleration, enterprise pricing

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

Fable 5 is the first Anthropic Mythos model released for public use.