Nemotron 3 Ultra Free

nemotron-free Reasoning Tool Calling Open Weights

NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...

Providers 2

Released Jun 4, 2026

Input Modalities text

Output Modalities text

Tarsk Use coding

Available Providers (2)

Provider	Model ID	Input Cost	Output Cost	Context	Max Output	Docs
OpenCode Zen	`nemotron-3-ultra-free`	$0/MTok	$0/MTok	1M	128K
OpenRouter	`nvidia/nemotron-3-ultra-550b-a55b:free`	$0/MTok	$0/MTok	1M	65.5K

Capabilities

Reasoning

Tool Calling

Attachments

Open Weights

Structured Output