Claude Fable 5.1 & GPT-6 Astra packages are live

authorization

Backend

Enforcing access control in a service — where the check belongs, scoping queries by tenant, RBAC versus ABAC, and testing that a denial is actually…

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.