Llama 3.1 Nemotron Ultra 253B

Llama 3.1 Nemotron Ultra 253B

Developer	NVIDIA
Release date	April 7, 2025
Family	Nemotron
Context window	128K tokens
Max output	8K tokens
Input	Text
Output	Text
Weights	Open weights
Website	nvidia.com

Context: 128Ktokens
Released: 1y ago
Size: 253Bparameters

Specifications

Model

Developer: NVIDIA
Family: Nemotron
Type: Language model
Released: April 7, 2025
Model ID: nvidia/llama-3.1-nemotron-ultra-253b

Capabilities

Input → output: Text → Text
Max output: 8K tokens

Weights

Openness: Open weights
Size: 253B

Sources:models.dev

Metadata synced Nov 8, 2026, 11:03 AM UTC

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