NVIDIA AI Releases Nemotron 3.5 Lightning: A 30B Open MoE with 3B Active Parameters, and NeMo Switchyard Model Router
NVIDIA has released Nemotron 3.5 Lightning, an open 30 billion parameter Mixture-of-Experts (MoE) model with 3 billion active parameters. It is designed for agent execution and utilizes NeMo Switchyard for efficient model routing.

- NVIDIA released Nemotron 3.5 Lightning, a 30B open MoE model with 3B active parameters.
- The model is optimized for AI agent execution.
- NeMo Switchyard technology enables efficient routing to the cheapest capable model for each step.
- This release contributes to NVIDIA's open-source AI ecosystem.
NVIDIA has introduced Nemotron 3.5 Lightning, a new open-source Mixture-of-Experts (MoE) model. This model boasts 30 billion total parameters but activates only 3 billion per inference, making it more efficient for specific tasks.
It is specifically targeted at the agent execution layer, aiming to enhance the capabilities of AI agents. A key component of this release is NeMo Switchyard, a model router that intelligently directs each step of an agent's process to the most cost-effective and capable model within the MoE architecture.
This development signifies NVIDIA's continued push into open-source AI development, providing tools and models that can be integrated into various AI agent frameworks and applications.
Provides a new open-source MoE model and routing technology for building efficient AI agents.
Offers potential for more cost-effective AI agent deployment and execution.
Highlights NVIDIA's ongoing innovation and investment in the AI infrastructure and open-source space.
Advances the efficiency and capability of AI agents through open-source innovation.
- Mixture-of-Experts (MoE)
- An AI model architecture where multiple smaller 'expert' networks are combined, and only a subset is activated for any given input, improving efficiency.
- Agent execution layer
- The part of an AI system responsible for carrying out tasks or actions based on decisions made by the AI.
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