Nvidia Launches Switchyard Router and Nemotron 3.5 Lightning to Slash AI Task Costs by Two-Thirds

Enterprises using always-on AI agents face a dilemma: sending every task to top-tier models drives up costs, while creating custom routing logic for cheaper models demands constant engineering updates. Nvidia addresses this with Nemotron 3.5 Lightning, a powerful 30-billion-parameter open mixture-of-experts model tailored for high-volume, specialized tasks, paired with NeMo Switchyard, an open-source routing library that dynamically assigns each step of an AI workflow to the most cost-effective model.

Nvidia cites that Lightning produces results up to four times faster than comparable models and completes tasks about 30% quicker than Qwen3.6-35B at equal accuracy. Combined with Switchyard’s intelligent routing, costs can drop to roughly a third of running heavyweight models alone without losing frontier-level performance.

Unlike competitors that offer either models or routers, Nvidia controls both sides, integrating with existing solutions like Cognition, LangChain, Kong, and OpenRouter to offer flexible, real-time routing strategies based on agent state and cost predictions. Early adopters report significant cost savings—LangChain cuts costs by 74%, Ramp reduces expenses by 58%, and Cognition achieves near-frontier performance with 28% cost reduction.

Nemotron 3.5 Lightning builds on Nvidia's hybrid Mamba-Transformer and mixture-of-experts architecture, designed for efficiency over general-purpose use. Its speed-to-accuracy balance suits specialized agent workloads. Nvidia emphasizes open source and customization as key advantages in a crowded market of competitive open-weight models.

For enterprises, the shift is clear: routing AI models dynamically per task step using open-source tools paired with cost-efficient models leads to greater flexibility and substantial savings. The focus moves from identifying the best single model to mastering the orchestration of multiple models within intelligent systems.