Nace AI Open-Sources Drex 1.5: A 9B Decision Model That Scores Options, Not Text
Nace.AI has open-sourced Drex 1.5, a 9B decision model for agents and backend workflows.

Proof1 independent outlet
Key points
- The Drex 1.5 decision model does not write text.
- It reads a state and typed questions, then returns a probability for every option.
- Nace reports 58.08 on the public Decision Index 0.3.1, the top score under 10B parameters.
- Drex 1.5 is a decision model from Nace.AI that scores a fixed set of options in 1 forward pass.
Sources (1)
- [1]Nace AI Open-Sources Drex 1.5: A 9B Decision Model That Scores Options, Not TextMarkTechPost · Oct 10, 04:51 AM
Nace.AI has open-sourced Drex 1.5, a 9B decision model for agents and backend workflows.
The Drex 1.5 decision model does not write text.
Extractive summary: sentences quoted from the sources.
Hype check
Independently evaluated4 independent looks since
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