NVIDIA Nemotron 3 Ultra 550B A55B Base BF16 is a language model from NVIDIA. Its rank belongs to Nemotron 3 Ultra, the model this route serves. Its weights are downloadable under a use-restricted licence.
Figures as of 6 Nov 2026, 20:49 UTC · download the public dataset · methodology
This separately configured or accelerated route is reviewed as the same underlying model identity as Nemotron 3 Ultra. That canonical product owns rank and capability evidence; pricing, providers and other operational differences remain route-specific below.
OpenRouter endpoint status could not be refreshed. This model is not treated as currently served until a successful observation arrives.
Providers
Uptime measured over the last 30 minutesCurrent provider status is unavailable.
Deployment readiness
Metadata index- Artifact reproducibility
- 85.0
- Access & legal clarity
- 92.5
- Deployability
- 8.0
- Evaluation provenance
- 0.0
Not yet published: the base model it derives from, a current serving provider, measured provider uptime, published provider pricing, declared context and output limits, admitted benchmark results, results across several capability areas, results from more than one source, a confident match to its benchmark entries, pinned evaluation dataset versions.
A metadata completeness and deployability index—not a safety certification, quality grade, or production-readiness claim.
Market activity
Venue coverage- Market Gravity
- 10.3
- OpenRouter weekly popularity
- Not listed
Market Gravity uses OpenRouter’s full-catalogue popularity order. Sparse Vercel top-ten observations appear only when published and do not affect the score.
Market Gravity breakdown
- Usage55%
- 0.0
- Liquidity25%
- 0.0
- Open reach15%
- 50.0
- Freshness5%
- 55.2
OpenRouter weekly popularity across the full model catalogue.
Independent providers versus the model's open or closed cohort, weighted by uptime.
Hugging Face 30-day downloads for open models; neutral for closed models.
Time since first public availability, on a six-month half-life.
Specification
- Model ID
nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-Base-BF16- Declared output cap
- Unknown
OpenRouter catalogue or provider-endpoint declaration. Limits can vary by provider and prompt length; a model-wide maximum has not been independently verified. OpenRouter metadata
- Inputs
- Text
- Outputs
- Text
- Cached input tokens
- Not offered
- First seen on OpenRouter
- 3 Jun 2026
Capabilities
- Not supported: Reasoning
- Not supported: Tool use
- Not supported: Structured output
- Not supported: Response format
- Not supported: Moderated
Weights & access
Restricted license. Downloadable weights use a model-specific or use-restricted license. Review the linked license before use, redistribution, or commercial deployment.
- Access
- Restricted license
- Licence
- openmdw-1.1
- Pinned revision
- 9f5b80e48458
- Parameters
- 560.5B
- Architecture
- NemotronHForCausalLM
- Model type
- nemotron_h
- Hugging Face downloads (30d)
- 3K
- Downloads (all time)
- 10K
- Likes
- 42
- Repository updated
- 25 Aug 2026, 15:49 UTC