Nvidia Nemotron 3.5 Lightning
Nvidia Nemotron 3.5 Lightning is a language model with 30B parameters from NVIDIA. It is currently free at 1 provider with up to 262K tokens of context. The model supports step-by-step reasoning, supports tool calling. Its weights are open, so it can also run locally.
- Developer
- NVIDIA
- Parameters
- 30B / 3B active
- Context
- 262K tokens
- Type
- Text
- License
- Open weights
- Free since
- November 1, 2026
Where to use Nvidia Nemotron 3.5 Lightning for free
Each row is a separate free endpoint with its own limits.
Quick start
curl https://api.unorouter.com/v1/chat/completions \
-H "Authorization: Bearer $UNOROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "nvidia-nemotron-3.5-lightning-30b-a3b:free",
"messages": [{"role": "user", "content": "Hello!"}]
}'from openai import OpenAI
client = OpenAI(
base_url="https://api.unorouter.com/v1",
api_key="YOUR_UNOROUTER_API_KEY",
)
reply = client.chat.completions.create(
model="nvidia-nemotron-3.5-lightning-30b-a3b:free",
messages=[{"role": "user", "content": "Hello!"}],
)
print(reply.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.unorouter.com/v1",
apiKey: process.env.UNOROUTER_API_KEY,
});
const reply = await client.chat.completions.create({
model: "nvidia-nemotron-3.5-lightning-30b-a3b:free",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(reply.choices[0].message.content);Example for UnoRouter. Any OpenAI-compatible client works: Cursor, Cline, OpenCode, Open WebUI.
Benchmarks
Source: Artificial Analysis · Nemotron 3.5 Lightning
Similar free models
FAQ
Is Nvidia Nemotron 3.5 Lightning free?
Yes. As of November 1, 2026, Nvidia Nemotron 3.5 Lightning is free at UnoRouter. Each provider has its own limits — see the table above.
What is the context window of Nvidia Nemotron 3.5 Lightning?
The largest context among free routes is 262,000 tokens. Some providers cap it lower.
How do I call Nvidia Nemotron 3.5 Lightning via API?
Use any OpenAI-compatible client with base URL https://api.unorouter.com/v1, model ID nvidia-nemotron-3.5-lightning-30b-a3b:free, and a UnoRouter key.
How good is Nvidia Nemotron 3.5 Lightning?
Artificial Analysis Intelligence Index: 12.9, GPQA Diamond: 74%. For comparison, the strongest free model in the catalog right now is GLM 5.3 Flash.
Is Nvidia Nemotron 3.5 Lightning open-weight?
Yes, the weights are published — you can download and run it locally, for example with Ollama or LM Studio.