Nemotron Ultra 253B
NVIDIA's largest Nemotron model based on Llama 3.1 at 253B scale. Top-tier reasoning and coding with NVIDIA's training optimizations. Supports extended thinking for complex problem solving.
Benchmarks
This model hasn't been evaluated by Artificial Analysis yet. Benchmark scores will appear once they're published.
Specifications
Providers
Compare with
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Nemotron 3 Ultravs Nemotron Ultra 253BFrequently Asked Questions about Nemotron Ultra 253B▼
Who created Nemotron Ultra 253B?
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Nemotron Ultra 253B was created by NVIDIA.
Is Nemotron Ultra 253B a reasoning model?
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No, Nemotron Ultra 253B is not a reasoning model. It responds directly without an extended internal thinking step. For tasks requiring deep chain-of-thought reasoning, consider models like Claude, o-series from OpenAI, or Gemini Thinking.
Does Nemotron Ultra 253B support image or vision input?
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No, Nemotron Ultra 253B does not currently support image or vision input. It is a text-only model.
Does Nemotron Ultra 253B support audio?
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No, Nemotron Ultra 253B does not support audio input.
What is the context window of Nemotron Ultra 253B?
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Nemotron Ultra 253B has a context window of 131K tokens, meaning it can process approximately 98,304 words of context at once.
Is Nemotron Ultra 253B open source?
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Nemotron Ultra 253B is a proprietary model developed by NVIDIA. The model weights and training data are not publicly available.
Where can I use Nemotron Ultra 253B?
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You can chat with Nemotron Ultra 253B on idapt.app — no separate API key required. idapt is an AI workspace with 200+ models, agents, computers, and tasks. You can also access Nemotron Ultra 253B through NVIDIA's own API or platform.