Nace.AI: Drex v1.5
nace-ai/drex-v1.5
Model weightsDrex v1.5 is a 9B decision model from Nace.AI. Given a state (text or JSON) and typed questions (yes/no, multiple choice, or ordinal score), it returns a calibrated probability for every option in a single forward pass, with no text generation. It is TypeSafe System One compatible and suits routing, classification, and policy checks that need a scored answer instead of prose.
Open weights and runtime: https://github.com/nace-ai/drex-decision-modelsOpens in new tab
Modalities
In / Out Price
$0.04 / $0per 1M
Context
131K
Released
Oct 9, 2026