Llama 3.1 Nemotron Ultra 253B

nvidia/llama-3.1-nemotron-ultra-253b

Flagship Nemotron model for high-throughput reasoning and complex agents

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Context window: 128K
Input: Text
Output: Text
Released: 2025-04-07

Max output: 8.2K
Weights: Open
Capabilities: Reasoning, Tool call, Temperature, Open weight

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ModelRegistry · Catalog updated 2026-09-29