NVIDIA · Free API

Nemotron 3 Ultra (OpenRouter)

Name: Nemotron 3 Ultra (OpenRouter)
Author: NVIDIA

Free “:free” variant on OpenRouter – rate-limited, no charge.

Free API Available 🛠 Tool calling 1M 🕒 Verified on 2026-10-22

NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE)

Free conditions

Free conditions: Free “:free” variant on OpenRouter – rate-limited, no charge.
Free until: —
Rate limits: 20 requests/min; 50 requests/day if you have bought fewer than 10 credits, 1,000/day after buying at least 10 (shared across all :free models).
Sign-up / login: Required
Real-name verification: —
Credit card: Not required
Region: —
Data use: —

Specs

Provider: NVIDIA
Platform: OpenRouter
Type: Free API
Modalities: Text
Parameters: —
Context length: 1M (1,000,000 tokens)
License: —
Tool calling: Yes
Released: 2026-06-04

How to access

API base URL: https://openrouter.ai/api/v1
Model ID: nvidia/nemotron-3-ultra-550b-a55b:free
Hugging Face: https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16
Platform page: https://openrouter.ai/nvidia/nemotron-3-ultra-550b-a55b:free

Official sources

OpenRouter models API https://openrouter.ai/api/v1/models
OpenRouter – Nemotron 3 Ultra https://openrouter.ai/nvidia/nemotron-3-ultra-550b-a55b:free
OpenRouter API – Limits https://openrouter.ai/docs/api_reference/limits

🕒 Verified on 2026-10-22 · Free terms change often. Always confirm limits, data-use policy and regional availability on the official page before relying on a free tier.

Nemotron 3 Ultra: paid API prices on 2 channels →

Free conditions

Specs

How to access

Official sources

Other free options from the same provider or model