{"slug": "nace-ai-open-sources-drex-1-5-a-9b-decision-model-that-scores-options-not-text", "title": "Nace AI Open-Sources Drex 1.5: A 9B Decision Model That Scores Options, Not Text", "summary": "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.", "body_md": "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.\n\nThe post [Nace AI Open-Sources Drex 1.5: A 9B Decision Model That Scores Options, Not Text](https://www.marktechpost.com/2026/10/09/nace-ai-open-sources-drex-1-5-a-9b-decision-model-that-scores-options-not-text/) appeared first on [MarkTechPost](https://www.marktechpost.com).", "url": "https://wpnews.pro/news/nace-ai-open-sources-drex-1-5-a-9b-decision-model-that-scores-options-not-text", "canonical_source": "https://www.marktechpost.com/2026/10/09/nace-ai-open-sources-drex-1-5-a-9b-decision-model-that-scores-options-not-text/", "published_at": "2026-10-10 04:51:34+00:00", "updated_at": "2026-10-10 07:09:45.024609+00:00", "lang": "en", "topics": ["artificial-intelligence", "machine-learning", "large-language-models", "ai-research"], "entities": ["Nace.AI", "Drex 1.5", "Decision Index 0.3.1", "MarkTechPost"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/nace-ai-open-sources-drex-1-5-a-9b-decision-model-that-scores-options-not-text", "markdown": "https://wpnews.pro/news/nace-ai-open-sources-drex-1-5-a-9b-decision-model-that-scores-options-not-text.md", "text": "https://wpnews.pro/news/nace-ai-open-sources-drex-1-5-a-9b-decision-model-that-scores-options-not-text.txt", "jsonld": "https://wpnews.pro/news/nace-ai-open-sources-drex-1-5-a-9b-decision-model-that-scores-options-not-text.jsonld"}}