NVIDIA Nemotron 3 Ultra has officially shipped on Hugging Face, NIM, and OpenRouter — making it the most capable US open-weights AI model available today with a staggering 550 billion parameters and over 300 tokens per second throughput.
What Is Nemotron 3 Ultra?
Nemotron 3 Ultra is NVIDIA’s latest open-weights large language model, released as part of NVIDIA’s push to give enterprises and developers access to frontier-level AI without proprietary API lock-in. It is deployable via Hugging Face, NVIDIA NIM microservices, and OpenRouter.
Key Specifications
- 550 billion parameters — largest US open-weights model released to date
- 300+ tokens/sec throughput on NVIDIA hardware
- One-click deployment available via AWS SageMaker JumpStart
- 5x faster inference via NVFP4 quantization on compatible GPUs
- Available on Hugging Face, NIM, and OpenRouter
Enterprise Use Cases
At GTC 2026, NVIDIA showcased Nemotron 3 Ultra as the backbone for agentic AI frameworks like NeMoCLAW and OpenCLAW — orchestration tools for multi-agent enterprise deployments. The model is purpose-built for high-throughput, cost-sensitive workloads where proprietary API pricing is a concern.
Why It Matters
For developers and businesses, Nemotron 3 Ultra closes a major gap: frontier-level open-weights performance that can be self-hosted or deployed on cloud infrastructure without per-token API costs. It’s a direct challenge to Llama and Qwen in the open-source AI space.