What Is Nemotron 3.5 Lightning

An agent may make one difficult call to plan a task and dozens more to carry it out. Those later calls read files, choose tools, validate results, and decide what to do next. NVIDIA built Nemotron 3.5 Lightning for that high-volume part of the workflow. Nemotron 3.5 Lightning is a 30-billion-parameter mixture-of-experts model that activates about 3 billion parameters for each token. It supports tool calls, coding tasks, instruction following, and other well-scoped agent steps. The name is easy to confuse with Nemotron 3 Ultra, but the two models are built for different parts of an agent workflow. Choosing between them affects the cost, latency, and reliability of the complete run. Nemotron 3.5 Lightning at a glance 262,144-token context on every current provider. Completion limits vary by provider, from 32,768 to 235,929 tokens Listed for both models. Two of the four current standard providers list it Listed for the standard model on all four current providers. Not listed for the free model nvidia/nemotron-3.5-lightning and nvidia/nemotron-3.5-lightning:free The endpoint limits and features in this table come from our model pages on September 11, 2026. Check the standard model page or the free model page before designing around a specific limit. Nemotron 3.5…