Claude Fable 5.1
Anthropic · September 1, 2026
● activeCloseddecoder onlymultimodal
Context Window512K tokens
Description
Specialized model variant focused on creative synthesis, interactive visual design generation, and narrative generation with constitutional alignment.
Key Innovations
Constitutional AI
Constitutional AIAnthropic's approach to AI safety where the model critiques and revises its own outputs against a set of principles.
Multimodal
MultimodalProcessing multiple types of input (text, images, audio, video) in a single model.