ModelsBenchmark resultEvaluation & Benchmarks · Large Language Models1 source · Oct 10, 2026

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)

Extractive summary: sentences quoted from the sources.

Before this

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  3. Oct 8, 2026Show HN: Jevman – AI decision models play Pac-Man
  4. Oct 8, 2026unslothai/unsloth v0.1.905-beta: Sandboxing is here!
  5. Oct 8, 2026ConwayResearch/Underdog-Saluki-27B-1.0
  6. Oct 7, 2026unslothai/unsloth v0.1.904-beta: Train your own Decision model

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