NVIDIA Nemotron 3 Ultra 550B A55B NVFP4 is a language model from NVIDIA. Its rank belongs to Nemotron 3 Ultra, the model this route serves. It reads up to 262K tokens of context, and 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.
Reported evaluation leads (7)
Not independent measurementStructured rows reported in this exact model repository at the pinned revision below. They are the publisher talking about itself: never measured evidence, never a score input on their own. They remain quarantined until dataset revision, harness, configuration and identity pass ModelCap’s independent admission review.
Deployment readiness
Metadata index- Artifact reproducibility
- 85.0
- Access & legal clarity
- 92.5
- Deployability
- 17.8
- Evaluation provenance
- 51.7
Not yet published: the base model it derives from, a current serving provider, measured provider uptime, published provider pricing, 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-NVFP4- Context window
- 262K tokens
- 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
- 02462641f13d
- Parameters
- 560.5B
- Architecture
- NemotronHForCausalLM
- Model type
- nemotron_h
- Hugging Face downloads (30d)
- 29K
- Downloads (all time)
- 1.4M
- Likes
- 378
- Repository updated
- 24 Aug 2026, 23:46 UTC