Anthropic’s two 5.1 configurations share model weights but not safeguards. Fable 5.1 is the broadly available option with effort and cache controls; Mythos 5.1 is reserved for vetted organizations and trusted research programs.
AI-powered workouts based on 100 million sets of training data
Personalized workout plans based on your fitness data
Get personalized meal plans and workout routines
Pick up to 3 — we tailor the catalog. Change anytime.
