NVIDIA: Nemotron Nano 9B V2 (free) — Free API

What is NVIDIA: Nemotron Nano 9B V2 (free)?

NVIDIA Nemotron Nano 9B V2 is a 9B-parameter language model trained from scratch by NVIDIA, available free on OpenRouter. Designed as a unified model for both reasoning and non-reasoning tasks — it generates a reasoning trace before delivering a final answer, with the ability to skip intermediate reasoning via system prompt configuration. This makes it a single model that handles both chain-of-thought and direct-response tasks. 131K context window. Text-only. Also available directly on NVIDIA NIM. OpenAI-compatible. Free tier: 200 RPD.

NVIDIA: Nemotron Nano 9B V2 (free) API Code Example

Paste your API key and run. See the config generator for Claude Code, Cursor, and more tools.

from openai import OpenAI

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="nvidia/nemotron-nano-9b-v2:free",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

import OpenAI from "openai";

const openai = new OpenAI({
  baseURL: "https://openrouter.ai/api/v1",
  apiKey: "YOUR_API_KEY",
});

const completion = await openai.chat.completions.create({
  model: "nvidia/nemotron-nano-9b-v2:free",
  messages: [{ role: "user", content: "Hello!" }],
});

console.log(completion.choices[0].message.content);

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "nvidia/nemotron-nano-9b-v2:free",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

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