Nace.AI open-sources Drex 1.5, a 9B decision model that scores options

Nace.AI has open-sourced Drex 1.5, a 9B decision model that returns probabilities for supplied options instead of generating text. It scores 58.08 on the public Decision Index 0.3.1, within the tie band of the closed Jev 1.13.0 at 57.96.

The weights are on Hugging Face, it runs on one 24 GB CUDA GPU or as a Q8_0 GGUF on Apple silicon and CPU, and it is also hosted on OpenRouter at $0.04 per 1M input tokens.