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Nemotron 3 Nano Omni (Free)

nvidia/nemotron-3-nano-omni-30b-a3b-reasoning

nvidia

NVIDIA's multimodal reasoning Nemotron Nano Omni hosted free by NVIDIA. 31B / 3.2B active MoE. Accepts text, images, video, audio. ChartQA 90.3, DocVQA 95.6, MMMU 70.8 — the only vision-capable free model in our catalog

Code Examples

from blockrun_llm import LLMClient

client = LLMClient()  # Uses BLOCKRUN_WALLET_KEY (never sent to server)
response = client.chat("nvidia/nemotron-3-nano-omni-30b-a3b-reasoning", "Hello!")

Pricing

InputFree / 1M tokens
OutputFree / 1M tokens
Context256K tokens
Max Output16K tokens

Free model — no payment or wallet required.

Payment

Network
Base
Currency
USDC
Protocol
x402

Pay per request with USDC on Base. No subscription required.

Try It

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About NVIDIA Nemotron 3 Nano Omni (Free)

NVIDIA's multimodal reasoning Nemotron Nano Omni hosted free by NVIDIA. 31B / 3.2B active MoE. Accepts text, images, video, audio. ChartQA 90.3, DocVQA 95.6, MMMU 70.8 — the only vision-capable free model in our catalog. It is built by NVIDIA and served through BlockRun's OpenAI-compatible API, which means you can call it without an account, an API key, or a subscription. Requests are paid for individually, in USDC, at the moment they are made.

What it costs

Nemotron 3 Nano Omni (Free) is free to call on BlockRun. No payment header is required, no wallet needs funding, and no API key is issued — requests are rate limited per IP rather than billed. It is a practical way to develop against the API surface before moving production traffic onto a paid model.

Specifications

Context window
256,000 tokens
Maximum output
16,384 tokens
API compatibility
OpenAI-compatible
Payment
Free — no payment required
Categories
chat, reasoning, vision

Calling it from your code

Pass nvidia/nemotron-3-nano-omni-30b-a3b-reasoning as the model field. Because the endpoint mirrors the OpenAI chat completions schema, any existing OpenAI client works by changing the base URL — streaming, tool use, and multi-turn messages all behave the same way.

The first request comes back as an HTTP 402 carrying a signed price quote. Your client signs that quote with a wallet holding USDC and retries; the second request returns the completion, and the payment settles on-chain. Client libraries handle this handshake for you, so in practice it is a single call. See the documentation for request and response shapes, or browse the full catalog of 71 chat models to compare alternatives.

Related models

Every model on BlockRun is reached through the same endpoint and the same payment flow, so switching is a one-line change to the model field. These are the closest alternatives to Nemotron 3 Nano Omni (Free):