Is the Nemotron API free?

Yes. NVIDIA's build.nvidia.com API catalog is free after phone verification, and Nemotron models are also on the free tiers of OpenRouter, Kilo AI Gateway, Ollama Cloud and LLM7.io.

How do I use Nemotron 3 Ultra for free?

On OpenRouter as nvidia/nemotron-3-ultra-550b-a55b:free (50 requests a day), on Ollama Cloud as nemotron-3-ultra, or on NVIDIA build as nvidia/nemotron-3-ultra-550b-a55b.

Can I use Nemotron for free without phone verification?

Yes: OpenRouter, Kilo AI Gateway, Ollama Cloud and LLM7.io offer Nemotron models without NVIDIA's phone check.

What is the NVIDIA API base URL?

https://integrate.api.nvidia.com/v1, with an NVIDIA API key (it starts with nvapi-) and a model name such as nvidia/nemotron-3-super-120b-a12b.

How to Get a Nemotron API Key for Free (5 Free Routes, 2026)

In short: NVIDIA's Nemotron 3 models are free on five services. NVIDIA's own API catalog has Nemotron 3 Nano, Super and Ultra (after phone verification), and OpenRouter, Kilo AI Gateway, Ollama Cloud and LLM7.io have Nemotron models on their free tiers too, without NVIDIA's phone check.

NVIDIA's own API: free, after phone verification

Nemotron is NVIDIA's model family. On build.nvidia.com, a free NVIDIA Developer Program account gets an API key after phone verification, offered in 231 locations. Accounts show a limit of up to 40 requests a minute. Where the phone check is not offered, NVIDIA's moderators point to help@build.nvidia.com.

Where Nemotron models are free

Where	Nemotron model	Free allowance	What it needs
NVIDIA (build.nvidia.com)	`nvidia/nemotron-3-super-120b-a12b`, `nvidia/nemotron-3-ultra-550b-a55b`, `nvidia/nemotron-nano-3-30b-a3b`	Up to 40 requests a minute, no daily limit stated	Phone verification, not offered in every country
OpenRouter	`nvidia/nemotron-3-super-120b-a12b:free`, `nvidia/nemotron-3-ultra-550b-a55b:free`, `nvidia/nemotron-3.5-lightning:free`	50 requests a day	A free account
Kilo AI Gateway	`nvidia/nemotron-3-super-120b-a12b:free`, `nvidia/nemotron-3-ultra-550b-a55b:free`	200 requests an hour without signing in	Nothing; a key is optional
Ollama Cloud	`nemotron-3-super`, `nemotron-3-ultra`, `nemotron-3-nano:30b`	A starter amount each month, shared	A free account
LLM7.io	`nemotron-3-nano:30b`	100,000 tokens a day, shared with its other free models	A free account; keys expire on a date you set
Perplexity Agent API	`perplexity/nemotron-3.5-super-120b-a12b`	A one-time $10 signup credit for some new accounts, 60 days	A Perplexity API account; no card

The Nemotron models on Ollama and LLM7 answered on free keys on 26 October 2026. The full list of free AI APIs, with each limit and source, is on how to get AI API keys for free.

Use a free Nemotron model in an app made for OpenAI

In the app, enter the service's key, its base URL and its Nemotron model name:

Service	Base URL	Model name
NVIDIA	`https://integrate.api.nvidia.com/v1`	`nvidia/nemotron-3-super-120b-a12b`
OpenRouter	`https://openrouter.ai/api/v1`	`nvidia/nemotron-3-super-120b-a12b:free`
Kilo AI Gateway	`https://ai-gateway.kilo.ai/api/v1`	`nvidia/nemotron-3-super-120b-a12b:free`
Ollama Cloud	`https://ollama.com/v1`	`nemotron-3-super`
LLM7.io	`https://api.llm7.io/v1`	`nemotron-3-nano:30b`

To put several free keys behind one address on your own computer, the open-source OmniRoute gateway switches to the next key when one runs out.

Words to know

API key: the password an app uses to call a model. See what is an API key.
Nemotron 3: NVIDIA's open model family: Nano (30B), Super (120B) and Ultra (550B).
Base URL: the address an app sends its requests to.
Token: a piece of a word; the unit models read and write. See tokens and context windows.

How to Get an NVIDIA Nemotron API Key for Free

NVIDIA's own API: free, after phone verification

Where Nemotron models are free

Use a free Nemotron model in an app made for OpenAI

Words to know

Frequently asked questions

More free API key tutorials