Next-Generation Intelligence for Long-Running Agents
Claude Fable 5 is Anthropic's most capable widely released model, built for the most demanding reasoning and long-horizon agentic work.. It excels at software engineering, scientific research, knowledge work, and vision tasks, delivering state-of-the-art benchmark performance across all categories.
Designed for long-horizon autonomy, Fable 5 can tackle multi-day, goal-directed projects while delegating to sub-agents and tracking dependencies. It self-verifies code by writing its own tests and using vision to confirm outputs, letting teams review finished work instead of supervising every step.
Reasoning model
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