NVIDIA: Nemotron 3 Nano Omni (free)

Placed within the assistant and video-tool category, most models sell themselves as the whole brain of a system; this one is designed to be a component of one. NVIDIA Nemotron 3 Nano Omni is a 30B-A3B open multimodal model built to act as a perception and context sub-agent inside larger enterprise agent systems, accepting text, image, and video input. It offers a 256,000-token context window, chain-of-thought reasoning, and function calling, and it is free to use through the OpenRouter API. A concrete role is sitting beneath an orchestrator, watching a video feed and incoming documents, extracting the relevant context, and passing structured observations up to the agent that makes decisions. Against video-capable alternatives like Google's Gemini 3.5 Flash, Gemini 3.1 Flash Lite, Gemini Pro and Flash Latest, and Xiaomi's MiMo-V2.5, its distinction is the sub-agent framing plus a zero-cost, open-access route, rather than positioning as a standalone product. Ideal for engineering teams assembling multi-agent pipelines who need a free perception layer that handles video and reasons about context. The caveat is that availability and rate limits depend on the upstream provider, so it is better suited to prototyping and elastic workloads than guaranteed production throughput. Choose it as a perception building block in a larger system; look elsewhere if you want a single, self-contained assistant with dependable capacity.