Text model
Nemotron 3 Ultra 550B A55B (Free)
nvidia/nemotron-3-ultra-550b-a55b:free
nvidia/nemotron-3-ultra-550b-a55b:free is a language model from NVIDIA you can call free of charge on the OceanToken API, rate-limited, with a 1M-token context window and up to 66K output tokens; it supports reasoning, tool calling.
At a glance
| Model ID | nvidia/nemotron-3-ultra-550b-a55b:free |
|---|---|
| Type | Text |
| Publisher | NVIDIA |
| Context window | 1,000,000 tokens |
| Max output | 65,536 tokens |
| Price | Free, rate-limited |
| Capabilities | reasoning, tool calling |
| Endpoint | /v1/chat/completions, /v1/responses |
| API shape | OpenAI-compatible |
| In the catalog since | 2026-06-04 |
Call it
Base URL https://api.oceantoken.ai/v1, your OceanToken key as the bearer token, and the model ID above as model. The OpenAI SDKs work unchanged; see your first request.
curl https://api.oceantoken.ai/v1/chat/completions \
-H "Authorization: Bearer $OCEANTOKEN_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "nvidia/nemotron-3-ultra-550b-a55b:free", "messages": [{"role": "user", "content": "Hello"}]}'
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nvidia/nemotron-3-nano-30b-a3b - Nemotron 3 Nano Omni 30B A3B Reasoning (Free)
nvidia/nemotron-3-nano-omni-30b-a3b-reasoning:free - Nemotron 3 Super 120B A12B
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nvidia/nemotron-3-super-120b-a12b:free - Nemotron 3 Ultra 550B A55B
nvidia/nemotron-3-ultra-550b-a55b
All NVIDIA models on OceanToken
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Prices and capabilities on this page were read from the live OceanToken catalog on 2026-10-18 (UTC), when the documentation was built. If a price has changed since, the console's Models page shows the current one.