Nemotron 3.5 Lightning from NVIDIA is now available for free on AI Gateway as nvidia/nemotron-3.5-lightning-free , served by NVIDIA.

Nemotron 3.5 Lightning is an open-weight reasoning and chat model for long-running agents, sub-agent work, chatbots, and RAG systems. The model has 30B parameters with 3B active per token, in a hybrid Mixture-of-Experts design that interleaves Mamba-2 and MoE layers with a few attention layers. It has a 1M token context window and supports tool calling and structured outputs.

Note: The provider may retain prompts for model improvement.

Call Nemotron 3.5 Lightning through the AI SDK , the Chat Completions , Responses , and Messages APIs, or a coding agent connected to AI Gateway.

Use nvidia/nemotron-3.5-lightning-free as the model name:

To use it in Claude Code, Codex, Cursor, and more, install the latest Vercel CLI and run setup:

npx vercel ai-gateway setup

Then select nvidia/nemotron-3.5-lightning-free in the agent.…