Nemotron 3.5 Content Safety (free)

NVIDIA Nemotron 3.5 Content Safety is a compact 4B-parameter multimodal guardrail model from NVIDIA, fine-tuned from Google Gemma-3-4B. It moderates both inputs to and responses from LLMs and VLMs, accepting text and image input and returning text output: a safe/unsafe classification for the user prompt and the response, safety category labels, and an optional reasoning trace. It covers 12 languages with a context window of up to 128K tokens. It is suited for prompt and response moderation, content classification, safety pipelines, and enterprise AI guardrails with policy enforcement, and includes a togglable reasoning mode. It is part of the NVIDIA Nemotron family of open models for agentic AI.

ChatNVIDIA128k tokensFree

nvidia/nemotron-3.5-content-safety:free

Context
128k tokens
Completion cap
8,192
Tools
No
JSON
No
Released
2026-06-04

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-content-safety:free",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is Nemotron 3.5 Content Safety (free)?
NVIDIA Nemotron 3.5 Content Safety is a compact 4B-parameter multimodal guardrail model from NVIDIA, fine-tuned from Google Gemma-3-4B. It moderates both inputs to and responses from LLMs and VLMs, accepting text and image input and returning text output: a safe/unsafe classification for the user prompt and the response, safety category labels, and an optional reasoning trace. It covers 12 languages with a context window of up to 128K tokens. It is suited for prompt and response moderation, content classification, safety pipelines, and enterprise AI guardrails with policy enforcement, and includes a togglable reasoning mode. It is part of the NVIDIA Nemotron family of open models for agentic AI. Nemotron 3.5 Content Safety (free) runs on the Geek Hub API (OpenAI-compatible). Model id: nvidia/nemotron-3.5-content-safety:free.
Is Nemotron 3.5 Content Safety (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 Content Safety (free)?
Nemotron 3.5 Content Safety (free) has a 128k tokens context window. It supports up to 8,192 completion tokens.
Does Nemotron 3.5 Content Safety (free) support tool calling and structured outputs?
Nemotron 3.5 Content Safety (free) does not advertise tool calling on this endpoint. Structured outputs are not listed for this endpoint.
When was Nemotron 3.5 Content Safety (free) released?
Nemotron 3.5 Content Safety (free) was released on 2026-06-04.

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