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[ARTICLE · art-148637] src=marktechpost.com ↗ pub= topic=artificial-intelligence verified=true sentiment=· neutral

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 that returns a probability for every option in a single forward pass and reads up to 128K tokens. Drex 1.5 scores 58.08 on Decision Index 0.3.1.

by read1 min views1 publishedOct 10, 2026

Nace.AI has open-sourced Drex 1.5, a 9B decision model that returns a probability for every option in 1 forward pass. It scores 58.08 on Decision Index 0.3.1 and reads up to 128K tokens.

The post Nace AI Open-Sources Drex 1.5: A 9B Decision Model That Scores Options, Not Text appeared first on MarkTechPost.

source & further reading
marktechpost.com — original article Microsoft AI Releases Microsoft-Decision-1: A Qwen3.5-9B Decision-Scoring Model OpenAI Decisions API Hits Public Beta With 10x Faster Typed Answers Meet the Underdog Saluki 27B: A 2-bit Qwen3.8-27B That Beats the Original at Tool Calling
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