NVIDIA: Nemotron 3 Nano Omni (free)

Nemotron 3 Nano Omni is a free multimodal model from NVIDIA that accepts text, audio, image, and video inputs, giving it broader input coverage than many comparably priced options. Its context window reaches 256,000 tokens, and it supports tool use and reasoning, though structured output support is unconfirmed. Maximum response length is 65,536 tokens. The zero cost makes it worth shortlisting for developers prototyping multimodal pipelines or teams running high-volume workloads where inference budget is a real constraint. The honest caveat is that there is no independent benchmark coverage yet, so its output quality relative to other models remains unproven. Buyers who need verified performance data before committing should treat this as an experimental option and run their own task-specific evaluations before relying on it in production.