NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it supports text input and output with a context window of up to 1M tokens. It is suited for long-running agentic workflows, including agent orchestration, coding agents, deep research, and complex enterprise tasks. It is particularly strong at multi-step reasoning and planning, with high-throughput inference designed for high-volume agent pipelines. It is part of the NVIDIA Nemotron family of open models for agentic AI.
Free
Free calls share a limit of 10 requests a minute and 100 a day across all free models. The paid version has no per-minute limit.
Throughput is how fast the model writes (tokens per second, higher is better). Time to first token is how long before the answer starts (lower is better).
Share of requests served without a server error. Client errors (4xx) do not count.
Works with the OpenAI SDK pointed at our base URL. Every parameter is in the API reference.
Tokens processed per day on NagaAI.
NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it supports text input and output with a context window of up to 1M tokens.
Nemotron 3 Ultra (free) is free on NagaAI: a free account calls it without topping up, up to 10 requests a minute and 100 a day across all free models.
Nemotron 3 Ultra (free) reads up to 1M tokens in one request, counting the prompt and the answer together.
Yes. Nemotron 3 Ultra (free) can call your functions as tools and can answer in a JSON schema you give it.
It takes text as input and returns text.
Create an API key, copy the model ID from the top of this page and send requests with the OpenAI or Anthropic SDK pointed at NagaAI. The API section on this page has a ready example.
Nemotron 3.5 Super VLNvidiaNemotron 3.5 LightningNvidiaNemotron 3.5 Content SafetyNvidia$0.10 / $0.10 per 1MNemotron 3 SuperNvidiaNemotron 3 Nano 30B A3BNvidia$0.03 / $0.12 per 1M
LFM3-1.7BLiquid AI$0.04 / $0.10 per 1M