NVIDIA Nemotron 3 Ultra is a 550 billion parameter (55B active) open model from NVIDIA built for long-running, agentic workflows with fast and affordable performance across hundreds of tool calls.
Model highlights
- Built for long-running agents: Tuned for agent orchestration, coding agents, deep research, and complex enterprise workflows that run across hundreds of steps.
- 1M token context: Keep entire codebases, long tool histories, and research trails in context without losing the thread.
- Frontier reasoning, high efficiency: 550B total parameters with only 55B active per token, and optimized for NVFP4, NVIDIA’s 4-bit floating point format that packs the model into less memory and runs faster.
Benchmarks
Nemotron 3 Ultra leads on accuracy across agent productivity, instruction following, and long-context tasks, while delivering leading throughput—saving up to 30% on costs compared to other leading open models.
Figure 1: Nemotron 3 Ultra leads among open models on agentic benchmarks for agent productivity, coding, and instruction following.