Llama 3.1 Nemotron Ultra 253B

NVIDIA-tuned Llama 3.1 253B for maximum capability.

llama-3.1-nemotron-ultra-253b
STABLEScheduled for DeactivationGet StartedView uptime
128,000 context
Released April 7, 2025
Starting at $0.60/M input tokens
Starting at $1.80/M output tokens
Streaming
JSON Output
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Select Provider

All Providers for Llama 3.1 Nemotron Ultra 253B

OffRail routes requests to the best providers that are able to handle your prompt size and parameters.

Nebius AI
Context: 128kQuant: fp8
Deactivating on Aug 31, 2026
Input
$0.6
/M tokens
Cache Read
/M tokens
Output
$1.8
/M tokens
Get Started

Frequently asked questions

What is Llama 3.1 Nemotron Ultra 253B?

NVIDIA-tuned Llama 3.1 253B for maximum capability. You can access it through OffRail's OpenAI-compatible API with automatic provider routing, fallback, and cost analytics.

How much does Llama 3.1 Nemotron Ultra 253B cost?

Pricing for Llama 3.1 Nemotron Ultra 253B on OffRail starts at $0.60 per million input tokens and $1.80 per million output tokens, depending on the provider. The pricing table above always reflects the current per-provider rates.

What is the context length of Llama 3.1 Nemotron Ultra 253B?

Llama 3.1 Nemotron Ultra 253B supports a context window of up to 128,000 tokens on its largest provider deployment.

Which providers serve Llama 3.1 Nemotron Ultra 253B?

Llama 3.1 Nemotron Ultra 253B is served by Nebius AI through OffRail. Requests are automatically routed to the best available provider, with fallback when a provider has issues.

Does Llama 3.1 Nemotron Ultra 253B support tool calling and structured outputs?

Llama 3.1 Nemotron Ultra 253B supports soft JSON output, but not tool calling or strict JSON output schema.

When was Llama 3.1 Nemotron Ultra 253B released?

Llama 3.1 Nemotron Ultra 253B was released on April 7, 2025.