nemotron-3-ultra-550b-a55b

nvidia/nemotron-3-ultra-550b-a55b

Open, efficient hybrid Mamba-Transformer MoE with 1M context, excelling in agentic reasoning, coding, planning, tool calling, and more

Context Length

1,048,576 tokens

Input Pricing

Not published

Output Pricing

Not published

Recent Latency

No probes

Model Architecture & Limits

Canonical IDnvidia/nemotron-3-ultra-550b-a55b

Publisher / Originatornvidia

Model FamilyNemotron

ArchitectureMamba2-Transformer Hybrid Latent Mixture of Experts (LatentMoE) with Multi-Token Prediction (MTP) (Nemotron Hybrid LatentMoE)

Context Window Limit1,048,576 tokens

Max Output Tokens4,096 tokens

Endpoint Protocolopenai-chat

Capabilities & Modal Surfaces

Chat Conversation✓ Yes

Tool / Function Calling✓ Yes

Reasoning / Thinking✕ No

Structured Output (JSON)✓ Yes

Vision / Multimodal✓ Yes

Audio Processing✓ Yes

License & Restrictions

Governing Terms: The trial service is governed by the [NVIDIA API Trial Terms of Service](https://assets.ngc.nvidia.com/products/api-catalog/legal/NVIDIA%20API%20Trial%20Terms%20of%20Service.pdf). Use of this model is governed by the [OpenMDW License Agreement, version 1.1](https://raw.githubuserco

Commercial and research use permitted under governing model and API terms.