> ## Documentation Index
> Fetch the complete documentation index at: https://docs.venice.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# NVIDIA Nemotron 3 Ultra API

> NVIDIA Nemotron 3 Ultra API on Venice: 256K context, $0.625 input and $3.13 output per 1M tokens. Private, with zero data retention.

> [accordion] Plain-text specification
>
> ## NVIDIA Nemotron 3 Ultra API
>
> NVIDIA Nemotron 3 Ultra is a large language model by NVIDIA, available on the Venice API as `nvidia-nemotron-3-ultra-550b-a55b`. It runs privately, with zero data retention.
>
> NVIDIA Nemotron 3 Ultra is built for frontier reasoning, orchestration, coding agents, deep research, and complex enterprise workflows. It delivers up to 5x faster inference and up to 30% lower cost for agentic workloads.
>
> ### NVIDIA Nemotron 3 Ultra API pricing
>
> | Model ID | Variant | Privacy | Price |
> | - | - | - | - |
> | `nvidia-nemotron-3-ultra-550b-a55b` | Standard | Private | $0.625 / $3.13 per 1M |
>
> ### NVIDIA Nemotron 3 Ultra specifications
>
> | Spec | Value |
> | - | - |
> | Provider | NVIDIA |
> | Released | Jun 4, 2026 |
> | Privacy | Private |
> | Status | Stable |
> | Open weights | Yes |
> | Context window | 256K tokens |
> | Max output | 32K tokens |
> | Reasoning effort | none, low, medium, high |
> | Served precision | FP8 |
>
> ### How to use the NVIDIA Nemotron 3 Ultra API
>
> Send requests to `POST https://api.venice.ai/api/v1/chat/completions` with `"model": "nvidia-nemotron-3-ultra-550b-a55b"` and your API key.
>
> ```bash theme={"system"}
> curl https://api.venice.ai/api/v1/chat/completions \
>   -H "Authorization: Bearer $VENICE_API_KEY" \
>   -H "Content-Type: application/json" \
>   -d '{
>     "model": "nvidia-nemotron-3-ultra-550b-a55b",
>     "messages": [{ "role": "user", "content": "Explain TEE attestation in two sentences." }],
>     "reasoning_effort": "low"
>   }'
> ```
>
> ### Related models
>
> * [Grok Build 0.1 API](https://docs.venice.ai/models/grok-build-0-1.md): $1.00 / $2.00 per 1M
> * [Seed 2.1 Turbo API](https://docs.venice.ai/models/seed-2-1-turbo.md): $0.625 / $3.13 per 1M
> * [Kimi K2.7 Code API](https://docs.venice.ai/models/kimi-k2-7-code.md): $0.75 / $3.50 per 1M
> * [Aion 3.0 Mini API](https://docs.venice.ai/models/aion-3-0-mini.md): $0.875 / $1.75 per 1M


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