Llama 3.1 Nemotron Ultra 253B

by NVIDIAChat

Flagship Nemotron model for high-throughput reasoning and complex agents

Context: 128K tokens
Max output: 16,384 tokens
Released: 2025-04-07
Weights: Open

Feed

nvidia/llama-3-1-nemotron-ultra-253b-v1

Specifications

Full facts as recorded, incl. what is unknown.

Released: 2025-04-07
Weights: Open
Input: Text
Output: Text
Context window: 128,000 max across endpoints
Max output: 16,384
Providers: 3
Epoch Capabilities Index: not evaluated
Direct price range: $0.60 in · $1.80 out per 1M tokens · 2 of 3 providers have a comparable price

More details

Last updated: 2025-04-07
Knowledge cutoff

Capabilities

Across all endpoints: supported if any endpoint supports it.

Tool calling
Parallel toolsunknown
Structured outputunknown
Reasoning
Image input
PDF input
Audio input
Audio outputunknown
Video input
Prompt cachingunknown
Web searchunknown
Computer useunknown
System messagesunknown
Assistant prefillunknown
Temperature
Streamingunknown
Attachments

Endpoints

One row per provider and variant; gateways are listed separately.

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Price history

Atom feed

No change since 19 Oct 2026. The cheapest direct price has been $0.60 in / $1.80 out per 1M tokens at Nebius Token Factory on every data refresh since then.

Tracked from 19 Oct 2026. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON

Cost calculator

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Heads up: prices are indicative list rates scraped from provider pricing pages; verify with the provider before relying on them. Report incorrect data for this model