NVIDIA AI Releases Nemotron 3.5 Lightning: A 30B Open MoE with 3B Active Parameters, and NeMo Switchyard Model Router

MarkTechPost · 2 months ago · 10 ● 2 sources

NVIDIA released Nemotron 3.5 Lightning, an open Mixture-of-Experts model for always-on agent execution, alongside NeMo Switchyard, an open-source router for sending each agent step to the most suitable model. Nemotron 3.5 Lightning is a 30B model with 3B active parameters and a 1M-token context window. The tooling enables cheaper, lower-latency agent workflows by routing tool calls and validations away from frontier models, with Switchyard reported to cut LangChain benchmark cost by 74% at about a 6-point accuracy drop.