Nace.AI
Nace.AI: Drex v1.5
nace-ai/drex-v1.5
Drex 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-models
/ 1M tokens · Token reference
/ 1M tokens · Token reference
tokens
Decisions output · Token reference fields do not establish an output-unit price.
Limits
Context
131,072
tokens
Max output
117,964
90% of the context window
Parameters
8,953,803,264
Model facts
Author
Nace.AI
Tokenizer
Other
Modality
Text -> Decisions
License
Other
Created
Oct 9, 2026
Hugging Face
nace-ai/drex-v1.5