NvidiabalancedTool use

Nemotron 3 Ultra (batch)

NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...

512K context·~384K words·

View context details Compare with Jp Anthropic Claude Sonnet 4 6

Context window512Ktokens

Context window

This model accepts 512K tokens in one request (~384K words of text).

Context window size512K tokens

4K32K128K1M10M

What fits in one request

Short document
About 1,500 words of text
Fits
Long document
About 37K words of text
Fits
Small codebase
About 150K words of text
Fits
Full novel
About 375K words of text
Fits

Specifications

Context size, pricing, and release info in one place.

Context window: 512,288 tokens (512K)
Speed tier: balanced
Provider: Nvidia
Release date: Jun 2026

Capabilities

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Supported (5)

Tool use: Can call external tools and APIs; Supported
Function calling: Structured function call interface; Supported
Extended thinking: Shows its chain-of-thought reasoning; Supported
Streaming: Returns tokens as they are generated; Supported
Prompt caching: Reuse repeated prompt prefixes cheaply; Supported

Not supported (3)

Vision: Accepts image inputs alongside text; Not supported
Web search: Can browse the web during a request; Not supported
Batch API: Process many requests asynchronously; Not supported

Best for

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Reasoning AI agents Long documents RAG

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Frequently asked questions

Short answers about context size and how this model behaves.

Nemotron 3 Ultra (batch) has a context window of 512K tokens (512,288 tokens). This large window is well-suited for long document analysis, extensive codebases, and multi-session agent workflows.

More from Nvidia

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Nemotron 3 Ultra

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Nemotron 3 Ultra (free)

1Mbalanced

Nemotron 3 Nano 30B A3B

262Kfast

Nemotron 3 Super

262Kbalanced

Nemotron 3 Super (free)

262Kbalanced

Nvidia Nemotron Nano 3 30b

262Kfast

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Example: a multi-turn chat session

Without Mem0~128K tokens sent

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