Nemotron 3.5 Lightning (free)

NVIDIA Nemotron 3.5 Lightning is an open mixture-of-experts model from NVIDIA, with 3B active parameters out of 30B total. It is suited for high-throughput agentic workloads and specialized tasks that benefit from domain-specific customization.

ChatNVIDIA1M tokensFree

nvidia/nemotron-3.5-lightning:free

Context
1M tokens
Completion cap
65,536
Tools
Yes
JSON
No
Released
2026-08-11

Call it from Geek Hub

Same OpenAI SDK. Change the base URL and the model id.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nvidia/nemotron-3.5-lightning:free",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is Nemotron 3.5 Lightning (free)?
NVIDIA Nemotron 3.5 Lightning is an open mixture-of-experts model from NVIDIA, with 3B active parameters out of 30B total. It is suited for high-throughput agentic workloads and specialized tasks that benefit from domain-specific customization. Nemotron 3.5 Lightning (free) runs on the Geek Hub API (OpenAI-compatible). Model id: nvidia/nemotron-3.5-lightning:free.
Is Nemotron 3.5 Lightning (free) free?
Yes. The listed price is zero — you are not charged for prompt or completion tokens. Free endpoints are rate limited.
What is the context length of Nemotron 3.5 Lightning (free)?
Nemotron 3.5 Lightning (free) has a 1M tokens context window. It supports up to 65,536 completion tokens.
Does Nemotron 3.5 Lightning (free) support tool calling and structured outputs?
Nemotron 3.5 Lightning (free) accepts tools and tool_choice for function calling. Structured outputs are not listed for this endpoint.
When was Nemotron 3.5 Lightning (free) released?
Nemotron 3.5 Lightning (free) was released on 2026-08-11.

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