Nemotron 3 Ultra 550B API
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.
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
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"}] }'Any OpenAI SDK works: set the base URL to https://api.relayswitch.io/v1 and the model to nemotron-3-ultra-550b-a55b. Get a key or read the docs.
Nemotron 3 Ultra 550B API key and pricing
One key covers Nemotron 3 Ultra 550B and every other model in the catalog. Open the console with an email address, top up from $10 by card or in USDT, USDC, BTC, ETH, SOL, create a key, and send nemotron-3-ultra-550b-a55b as the model. No identity check, no subscription; the balance moves only when you call.
Costs at the live rates above; input and output billed separately, per token, from the prepaid balance.
Nemotron 3 Ultra 550B: questions
Payment, keys and billing in short.
Run Nemotron 3 Ultra 550B today
Top up by card or crypto and send "nemotron-3-ultra-550b-a55b".