Anthropic Unveils Claude Fable 5.1 and Mythos 5.1 with Cheaper Prompt Cache

OpenRouter ·

Key Info

Anthropic announced Claude Fable 5.1 and Claude Mythos 5.1, positioning them as the world's most advanced models for coding and knowledge work. Fable 5.1 keeps Fable 5's pricing at $10/M input and $50/M output tokens, while prompt cache reads drop to $0.25/M tokens—75% below the previous cache-read rate.

Highlights

  • Fable 5.1 retains the same input/output token pricing as Fable 5, ensuring no cost increase for existing workloads.
  • Prompt cache reads are now $0.25/M tokens, a 75% reduction from the old rate, making cached workflows significantly cheaper.
  • The new models target coding and knowledge work, with Anthropic claiming they are the most advanced available.
Loading...