tl;dr: NVIDIA released Nemotron 3.5 Lightning, a 30B-parameter mixture-of-experts open model optimized for high-volume agentic tasks, claiming up to 4x faster output and 30% faster task completion versus peers, with customization support via NeMo. Alongside it, NVIDIA open-sourced NeMo Switchyard, a model routing library that directs prompts to the most suitable model across open, proprietary, and NVIDIA options—internal benchmarks show ~⅓ the cost of using Opus 4.8 alone. Partners including LangChain, Ramp, Cognition, and Kong report cost reductions of 27–74% while maintaining near-frontier accuracy.