Claude Fable 5.1 & GPT-6 Astra packages are live

mistral.ai

Design

Mistral AI brands itself with a singular signature — atmospheric sunset gradients (mustard, orange, deep red) layered over photography of mountains,…

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.