Drex 1.5 Drex 1.5 is an open-source decision-making AI model from Nace AI with under 10 billion parameters and a 128K context window. It ranks #1 on the Decision Index and is designed for fast, calibrated choices in agent workflows such as routing, tool selection, classification, and guardrails. The model supports local deployment via llama.cpp, Ollama, and Unsloth, plus integration with Claude Code, Codex, Cursor, OpenCode, and other agent tools. Weights, code, and API are public.
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“We might be building AI agents the wrong way. Right now, we use massive LLMs for almost everything. Reading documents. Routing tasks. Choosing tools. Making simple decisions. But not every step needs a giant reasoning model. That's why Drex 1.5 is interesting. Nace AI just open-sourced a decision model with: → 128K context → Fewer than 10B parameters → #1 ranking on Decision Index → Local deployment support → Compatibility with Claude Code, Codex, and Cursor Instead of using one enormous model for every task, developers can experiment with smaller models built for specific decisions. The future of AI agents might be less about bigger brains and more about smarter architecture.”
“Imagine running a 128K-context decision model entirely on your own infrastructure. No need to send your documents to a hosted API. That's what Drex 1.5 makes possible. Open weights. Open code. Under 10B parameters. And it works with popular agent tools like Claude Code and Codex. More control for AI builders.”
“Drex 1.5 is now open source. → #1 on the Decision Index (58.28, ahead of Jev’s 57.91) → under 10B parameters → 128K context, the first decision model with a window that size → weights, code and API, all public This demo moderates a live Twitch chat with custom filters: 8,500 messages checked, the toxic ones hidden or blurred as they come in. Run it locally with llama.cpp, Ollama or Unsloth and plug it into Claude Code, Codex, Cursor or OpenCode. Your hardware, your data.”
“this ai reads the terms you never read i gave it openai's terms of use with "scan user agreement". drex reads the whole document in one go and highlights only what affects you as a paying user. → auto-charged until you cancel → suspended if payment fails → price hikes with 30 days' notice drex 1.5 is now open source, with 128k context. link in the first comment. next time you hit "i agree", at least you'll know what you're agreeing to.”