Fable 5

Claude Fable 5 is Anthropic’s most capable generally available AI model to date, delivering state-of-the-art performance across software engineering, knowledge work, scientific reasoning, vision, and long-horizon autonomous tasks. Designed for broad deployment, Fable 5 combines Mythos-class intelligence with advanced safety safeguards that help prevent misuse while maintaining exceptional capability for enterprise and developer workflows. The model also introduces major improvements in memory, coding efficiency, multimodal understanding, and autonomous problem-solving, enabling it to tackle complex tasks that previously required teams of human experts.