Claude Fable 5.1 AI mini apps

The most capable of Claude's AI models. Built for demanding reasoning, long agentic tasks and ambitious knowledge work. Thinking mode enabled.

Mythos-tier AI model offering advanced reasoning and intelligent responses for a wide range of tasks.

A storytelling AI that crafts engaging fables, fairy tales, and narrative content with moral depth and creative flair.

Claude Fable 5.1 delivers frontier intelligence for ambitious tasks across coding, scientific research, and enterprise workflows.

Claude Fable 5.1 is the world’s most advanced model for coding and knowledge work—and their research capabilities offer an early glimpse of how AI models will contribute to scientific progress.

A thoughtful Claude 5.1 Fable chatbot for clear ideas, questions, and drafts.

Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5.