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Claude Fable 5

A frontier Claude model for autonomous knowledge work, deep reasoning, coding, and long-context review.

FrontierAutonomous workDeep reasoningCodingLong context

For complex work that needs sustained judgment

Best for

Autonomous analysis
Large code review
Deep document work

Model traits

Sustained reasoning
Careful synthesis
Technical depth

Use boundaries

Tiny tasks
Casual drafts
Fresh facts
Chat History