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NVIDIA model product

Llama 3.1 Nemotron Ultra 253B

1 405B Instruct, developed by NVIDIA using Neural Architecture Search (NAS) and vertical compression.

Updated Aug 12, 2026. Default version: Llama 3.1 Nemotron Ultra 253B v1

Compare
LLMBoard score30.5Llama 3.1 Nemotron Ultra 253B v1
Coverage80%6 benchmark families
Context windowN/ATokens
Official input priceN/AOfficial price unavailable

On this page

  • Specification
  • Capability
  • Benchmarks
  • Arena
  • Runtime
  • Pricing
  • Versions
  • About
  • Compare
  • Similar models
  • FAQ

Llama 3.1 Nemotron Ultra 253B Specifications

Technical details for the model's default version.

Version
Llama 3.1 Nemotron Ultra 253B v1
Released
Apr 7, 2025
Knowledge cutoff
Dec 1, 2023
Parameters
253B
Context window
N/A
Max output
N/A
Inputs
text
Outputs
text
Open weights
No
License
Llama 3.1 Community License

Llama 3.1 Nemotron Ultra 253B Capability Profile

This profile uses the model's current scored version. Arena ratings and prices are shown separately.

Llama 3.1 Nemotron Ultra 253B v1 category scores

Llama 3.1 Nemotron Ultra 253B Benchmark Results

Benchmark scores for Llama 3.1 Nemotron Ultra 253B v1.

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Columns

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BFCL v274.1%02575.0%CAug 11, 2026
MATH-50097.0%083277.4%CAug 11, 2026
IFEval89.5%216568.8%CAug 11, 2026
LiveCodeBench66.3%257366.7%CAug 11, 2026
AIME 202572.5%8311427.4%CAug 11, 2026
GPQA76.0%10123457.1%CAug 11, 2026

Llama 3.1 Nemotron Ultra 253B Arena Results

Preference and agent-evaluation results for the default version.

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text style controloverall1961347.52,549N/AAug 10, 2026
textoverall2061319.52,549N/AAug 10, 2026

Llama 3.1 Nemotron Ultra 253B Runtime Performance

Provider-specific output speed and catalog latency for Llama 3.1 Nemotron Ultra 253B v1. Runtime does not affect the capability score.

No runtime data

No provider-specific speed or latency record is linked to the default version yet.

Browse runtime rankings

Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.

Llama 3.1 Nemotron Ultra 253B Pricing

Official vendor API pricing appears first, followed by individual provider offers.

Official API
N/A
Official provider
N/A
Lowest third-party
From $0.598 input, $1.79 output per 1M via Cortecs
Tracked offerings
4
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Columns

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Nvidianvidia/llama-3.1-nemotron-ultra-253b-v1globalN/AN/A128KAug 11, 2026
Cortecsllama-3.1-nemotron-ultra-253b-v1global$0.598$1.79128KAug 11, 2026
Nebius Token Factorynvidia/Llama-3_1-Nemotron-Ultra-253B-v1global$0.60$1.8128KAug 11, 2026
LLM Gatewayllama-3.1-nemotron-ultra-253bglobal$0.60$1.8128KAug 11, 2026

Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.

Llama 3.1 Nemotron Ultra 253B Versions

Available versions of this model. The score column identifies the version used in the overall ranking.

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Llama 3.1 Nemotron Ultra 253B v1Apr 7, 202530.5253BN/AN/ANoLlama 3.1 Community License

What is Llama 3.1 Nemotron Ultra 253B?

Key information about Llama 3.1 Nemotron Ultra 253B and its available data.

1 405B Instruct, developed by NVIDIA using Neural Architecture Search (NAS) and vertical compression. It underwent multi-phase post-training (SFT for Math, Code, Reasoning, Chat, Tool Calling; RL with GRPO) to enhance reasoning and instruction-following. Optimized for accuracy/efficiency tradeoff on NVIDIA GPUs.

Supports 128k context.

Data as of 2026-08-11.

Llama 3.1 Nemotron Ultra 253B vs nearby models

Open a comparison with the three ranked models immediately above and below this model.

Llama 3.1 Nemotron Ultra 253BvsQwen3 VL 30B A3B ThinkingLlama 3.1 Nemotron Ultra 253BvsQwen3 32BLlama 3.1 Nemotron Ultra 253BvsGPT-5-nanoLlama 3.1 Nemotron Ultra 253BvsKimi k1.5Llama 3.1 Nemotron Ultra 253BvsGemini 2.0 Flash ThinkingLlama 3.1 Nemotron Ultra 253BvsMinistral 3

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FAQ

Common questions about Llama 3.1 Nemotron Ultra 253B.

When was Llama 3.1 Nemotron Ultra 253B released?

Llama 3.1 Nemotron Ultra 253B's default version was released on Apr 7, 2025.

How much does Llama 3.1 Nemotron Ultra 253B cost?

No official standard PAYG price is currently available for Llama 3.1 Nemotron Ultra 253B. The lowest tracked third-party offer starts at $0.598 input and $1.79 output via Cortecs.

Who created Llama 3.1 Nemotron Ultra 253B?

Llama 3.1 Nemotron Ultra 253B was created by NVIDIA.

What is the context window for Llama 3.1 Nemotron Ultra 253B?

A context window is not available for the default version.

Is Llama 3.1 Nemotron Ultra 253B open weight?

No. The default version is not marked as having publicly available weights.

How many API providers offer Llama 3.1 Nemotron Ultra 253B?

4 provider offerings are linked to the default version.

What models should I compare Llama 3.1 Nemotron Ultra 253B with?

Nearby ranked alternatives include Qwen3 VL 30B A3B Thinking, Qwen3 32B, GPT-5-nano.