NVIDIA: Nemotron 3 Ultra (free)

550B / 55B

NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE).

Context
1M
Max output
66K

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling

Details

Model IDnvidia/nemotron-3-ultra-550b-a55b:free
Provider OpenRouter
Creator NVIDIA
Family—
License—
Status—
Typechat
Input modalitiestext
Output modalitiestext
Open weight—
Parameters550B / 55B
Architecture—
Context window1M tokens
Max input—
Max output66K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

API

GET/v1/models/openrouter/nvidia/nemotron-3-ultra-550b-a55b:free