BlockRun
Free · Nemotron Nano Omni

Free Nemotron API. With vision.
No key. No subscription.

Nemotron 3 Nano Omni — 31B / 3.2B active MoE, 256K context. The only free model that takes images, video, and audio. ChartQA 90.3, DocVQA 95.6, MMMU 70.8.

Try in 10 secondsSee all 6 waysWant Claude / GPT-5? Pay-per-call →
Quickstart · 10 seconds

Try it now.

No API key. No wallet. No signup. Paste this into any terminal — the response streams back from Nemotron hosted free on NVIDIA, routed through BlockRun.

curl
curl https://blockrun.ai/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nvidia/nemotron-3-nano-omni-30b-a3b-reasoning",
    "messages": [{"role": "user", "content": "What is the largest planet in our solar system?"}]
  }'
See all 6 waysFull API reference →
Spotlight
Nemotron 3 Nano Omni (Free)
nvidia/nemotron-3-nano-omni-30b-a3b-reasoning
Context
256K
Price
free
Modalities
text · image · video · audio
Best for
reasoning · vision
Nemotron Super 49B (Free)
nvidia/nemotron-super-49b
Context
131K
Price
free
Best for
reasoning · coding
Six ways to call it

6 ways to use Nemotron free.

BlockRun is the access layer. Pick the surface that matches how you build — terminal, notebook, IDE, agent runtime — and the same free models work everywhere.

  1. 01

    cURL

    Pass images via the OpenAI vision message format — base64 or URL

    Learn more →
    shell
    curl https://blockrun.ai/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nvidia/nemotron-3-nano-omni-30b-a3b-reasoning",
    "messages": [{"role": "user", "content": "What is the largest planet in our solar system?"}]
  }'
  2. 02

    Python SDK

    pip install blockrun-llm — or any OpenAI-compatible client

    Learn more →
    python
    # Works with the OpenAI SDK — no key required for free models
from openai import OpenAI

client = OpenAI(
    base_url="https://blockrun.ai/api/v1",
    api_key="not-needed-for-free-models",
)

response = client.chat.completions.create(
    model="nvidia/nemotron-3-nano-omni-30b-a3b-reasoning",
    messages=[{"role": "user", "content": "What is the largest planet in our solar system?"}],
)
print(response.choices[0].message.content)
  3. 03

    Franklin

    the AI agent with a wallet — free OSS models for routine tasks, paid models on demand

    Learn more →
    shell
    # Install Franklin
curl -fsSL https://franklin.run/install | sh

# Run with this model
franklin chat --model nvidia/nemotron-3-nano-omni-30b-a3b-reasoning "Summarize the README"
  4. 04

    ClawRouter

    smart router for OpenClaw / Claude Code — auto-picks free models when possible

    Learn more →
    shell
    # Install once
npm install -g @blockrun/clawrouter

# Then point any OpenAI-compatible client at the local proxy.
# ClawRouter routes to nvidia/nemotron-3-nano-omni-30b-a3b-reasoning (or the cheapest capable model)
# without changing your code.
  5. 05

    Claude Code MCP

    8 tools for Claude Code, Cursor & ChatGPT — call any free model from inside your editor

    Learn more →
    shell
    # Add the BlockRun MCP server (Claude Code, Cursor, or ChatGPT desktop)
claude mcp add blockrun --transport http https://mcp.blockrun.ai/mcp

# Then call from inside the editor:
#   blockrun_chat(model="nvidia/nemotron-3-nano-omni-30b-a3b-reasoning", messages=[{role:"user", content:"…"}])
  6. 06

    TypeScript SDK

    npm install @blockrun/llm — or any OpenAI-compatible client

    Learn more →
    typescript
    // Works with the OpenAI SDK — no key required for free models
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://blockrun.ai/api/v1",
  apiKey: "not-needed-for-free-models",
});

const r = await client.chat.completions.create({
  model: "nvidia/nemotron-3-nano-omni-30b-a3b-reasoning",
  messages: [{ role: "user", content: "What is the largest planet in our solar system?" }],
});
console.log(r.choices[0].message.content);
Trust / Defaults

We don't share
your data.

Your prompt goes to the AI provider you picked. Nothing else, nowhere else. No training, no retention beyond the request, no profile linking.

Read the privacy policyTerms →
We don't share your data
No training, no retention beyond the request. Your prompt is forwarded only to the AI provider you select.
No accounts, no KYC
Wallet in, prompt out. Pseudonymous by default — no email, no phone number, no identity documents.
Open-source SDKs, MIT
Read the code, audit the wire format, run it yourself. @blockrun/llm and blockrun-llm on npm and PyPI.
When free isn't enough

Want Claude, GPT-5,
or Gemini too?

No subscription. No monthly minimum. Pay per call in USDC via x402 — works the same endpoint, same SDK, same model IDs. Connect a wallet, top up $5, call any frontier model. No credit card.

See pay-per-call pricingGet started
FAQ

Everything you might
be wondering.

Is this really the only free vision model?
On BlockRun, yes — Nemotron 3 Nano Omni is the only free model that accepts images, video (up to 2 minutes), and audio (up to 1 hour). Everything else is paid.
How do I send an image?
Same as the OpenAI vision API — set message.content to an array with type: 'image_url' and either a URL or a data: base64 URI. Works with any OpenAI-compatible client.
Vision quality?
Strong: ChartQA 90.3, DocVQA 95.6, MMMU 70.8. Competitive with paid mid-tier vision models on charts, documents, screenshots. For frontier vision, switch to GPT-5.5 or Claude Opus on the paid tier.
256K context — how is that priced?
Free. The 128 KB request body cap still applies, so very long context plus an image won't fit — for multi-megabyte multimodal payloads, use paid models.
Are there other free Nemotron models?
Yes — Nemotron Super 49B and Super 120B for text reasoning. They're hidden from the public catalog over privacy concerns but callable by direct ID.