NVIDIA·nvidia/Llama-3_1-Nemotron-Ultra-253B-v1
Llama 3 1 Nemotron Ultra 253B v1 is ModelCap current-board rank #128 with Index 34.0 (Measured), from the ModelCap Index as of 15 Sept 2026, 19:09 UTC.
Llama 3 1 Nemotron Ultra 253B v1 weight access is restricted license, from ModelCap classification of published repository metadata as of 15 Sept 2026, 19:09 UTC.
Snapshot facts · download the public dataset · methodology
OpenRouter endpoint status could not be refreshed. This model is not treated as currently served until a successful observation arrives.
Current provider status is unavailable.
Published Max, X-High, High and other configurations for this model. These are sourced scores, not head-to-head essays.
BES normalizes admitted public benchmark evidence for measured Index rows. Its legacy score and observables prior do not define the public language rank.
These adoption and deployment observations remain context only. They do not change this model's ModelCap Index score or rank.
The bounded 0–100 capability score blends each source’s competitive placement with its published achievement, then combines capability families. Evidence breadth adds a modest uncertainty adjustment; price and popularity are not part of benchmark-led rank.
Missing: artifactReproducibility.base-lineage, deployability.independent-provider-records, deployability.measured-provider-uptime, deployability.published-provider-pricing, deployability.declared-capacity, evaluationProvenance.evaluation-dataset-revisions.
A metadata completeness and deployability index—not a safety certification, quality grade, or production-readiness claim.
Market Gravity uses OpenRouter’s full-catalogue popularity order. Sparse Vercel top-ten observations appear only when published and do not affect the score.
Arena has published current community results for Default. No default-configuration result is published, so the raw Arena field stays configuration-specific. The strongest supported result can still inform ModelCap Score with reduced confidence.
Current board through 13 Sept 2026, 14:00 UTC
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.
Restricted license. Downloadable weights use a model-specific or use-restricted license. Review the linked license before use, redistribution, or commercial deployment.
Models within 3 places of #128 on the ModelCap Index.
The same publisher's other current models with a public Index position.
Llama 3 1 Nemotron Ultra 253B v1 holds ModelCap Index position #128 of 203 ranked language models as of 15 September 2026, with an Index score of 34.0 (interval 27.3–40.7); evidence: measured. The Index combines public benchmark boards with published uncertainty; the methodology page explains the weighting.
No live API price is listed for Llama 3 1 Nemotron Ultra 253B v1 in the current snapshot as of 15 September 2026 because the latest endpoint refresh was unavailable. ModelCap shows a price only when a provider currently lists one.
Restricted license (nvidia-open-model-license). Downloadable weights use a model-specific or use-restricted license. Review the linked license before use, redistribution, or commercial deployment. The repository is nvidia/Llama-3_1-Nemotron-Ultra-253B-v1 on Hugging Face.
Llama 3 1 Nemotron Ultra 253B v1 has published results on 1 public board tracked by ModelCap as of 15 September 2026: BFCL V4 10.0 (#82 of 83). Each board page ranks every tracked model on that benchmark; the ModelCap Index combines them with published uncertainty.
Llama 3 1 Nemotron Ultra 253B v1 ranks #128 (Index 34.0) and command a reasoning 08 2025 ranks #129 (Index 33.7) on the ModelCap Index as of 15 September 2026. The head-to-head page lines up their benchmarks, listed prices, context windows and provider counts side by side.
Llama 3 1 Nemotron Ultra 253B v1 first appeared in the catalogue on 7 Apr 2025. It is the current version in its family. Rank and price movements since then are recorded on the site's changes feed.