---
id: "nvidia/nemotron-3-ultra-550b-a55b:free"
also: ["nvidia/nemotron-3-ultra-550b-a55b-20260604", "nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16", "hf/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16"]
cheapest_list_usd_per_m: "1.0 in, 5.0 out, at deepinfra on hf"
cheapest_effective_usd_per_m: "1.0 in, 5.0 out, at deepinfra on hf"
context: 1000000
max_output: 65536
input: ["text"]
output: ["text"]
released: "2026-06-04"
reasoning: ["high", "medium", "none"]
api: ["/api/v1/chat/completions", "/api/v1/completions", "/api/v1/messages", "/api/v1/responses"]
params: ["tools"]
endpoints: 1
gateways: "hf (1)"
no_training: 0
trains: 0
retains_prompts: 0
intelligence: 11.8000
coding: 49.3000
agentic: 20.1000
---
# NVIDIA: Nemotron 3 Ultra (free)

NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...