---
title: "Nemotron 3 Ultra 550B API price | RelaySwitch"
canonical: https://relayswitch.io/models/nemotron-3-ultra-550b-a55b
generated: 2026-11-02T10:54:41.319Z
source: https://api.relayswitch.io/v1/catalog
base_url: https://api.relayswitch.io/v1
---

# Nemotron 3 Ultra 550B

Nemotron 3 Ultra 550B by NVIDIA through the RelaySwitch API: $1.50 per million input tokens, $1.50 per million output tokens. Pay by card or crypto (Card, USDT, USDC, BTC, ETH, SOL). No KYC.

## Price per million tokens

| Input | Cached input | Output |
| --- | --- | --- |
| $1.50 | $0.30 | $1.50 |

## Specs

- Model id: `nemotron-3-ultra-550b-a55b`
- Developer: NVIDIA
- Context window: 1M tokens
- Max output: not published
- Input: text
- Released: 2026-06-04

## Call it

```bash
curl https://api.relayswitch.io/v1/chat/completions \
  -H "Authorization: Bearer $RELAYSWITCH_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "nemotron-3-ultra-550b-a55b", "messages": [{"role": "user", "content": "Hello"}]}'
```

Keys and top-ups: https://app.relayswitch.io/console