Claude Fable 5.1 & GPT-6 Astra packages are live

mastercard

Design

Mastercard's experience reads like a warm, editorial magazine built from soft stone and signal orange. The canvas is a muted putty-cream (`#F3F0EE`)…

Choose your model

Available for 11 model families. The engineering substance is the same in each; the structure, checklist phrasing and constraint ordering are tuned per family.