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NVIDIA: Llama 3.1 Nemotron Ultra 253B v1

Llama-3.1-Nemotron-Ultra-253B-v1 is a large language model (LLM) optimized for advanced reasoning, human-interactive chat, retrieval-augmented generation (RAG), and tool-calling tasks. Derived from Meta’s Llama-3.1-405B-Instruct, it has been significantly customized using Neural...

Best for

Complex ReasoningMath & LogicResearchInstruction Following
Context Window
131K tokens ≈ 291 pages of text
Input Cost
$0.60/1M
Output Cost
$1.80/1M
Latency p50

Pricing Details

Standard Pricing
Input (per 1M tokens)
$0.60
Output (per 1M tokens)
$1.80

Price history

4/12/2026$0.60 in / $1.80 out
4/11/2026$0.60 in / $1.80 out

Hallucination Score™ (est.)

Community reliability estimate · not official

Not yet rated

About this score: Community-estimated based on user reports and publicly available benchmark data (e.g. TruthfulQA). This is not an official score from the model provider. Scores may be inaccurate — always verify with the official leaderboard before making production decisions.

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Input & output cost per 1M tokens over time

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Provider

nvidia

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NVIDIA: Llama 3.1 Nemotron Ultra 253B v1 — modelstop.top