NVIDIA and LangChain have partnered to tune LangChain's Deep Agents harness specifically for NVIDIA Nemotron 3 Ultra, achieving benchmark-leading performance among open models at 10x lower inference cost than top closed models. The gains came entirely from harness engineering — adjusting system prompts, tool descriptions, and middleware — without any model retraining. The result is NVIDIA NemoClaw for LangChain Deep Agents, an open reference blueprint combining the tuned harness with NVIDIA OpenShell secure runtime, giving enterprises a fully customizable, self-hostable AI agent stack. Nemotron 3 Ultra is available through multiple hosted inference providers including Baseten, Fireworks, and Together AI.
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