NVIDIA

Nemotron 3 Ultra 550B A55B

CTX1M

Reasoning · Tools

Input$0.50/M

Output$2.50/M

Largest Nemotron 3 model for maximum open-weight reasoning and agent accuracy

Open weightsNVIDIA Open Model license915/1040

Drag to turn

NVIDIATextUncommon

Nemotron 3 Ultra 550B A55B

Largest Nemotron 3 model for maximum open-weight reasoning and agent accuracy

nvidia/nemotron-3-ultra-550b-a55b

Type: Text
Quality: Not rated yet
Context window: 1,000,000 tokens
Max output: 65,536 tokens
Input price: $0.50 / 1M tokens
Output price: $2.50 / 1M tokens
Cache read: $0.15 / 1M tokens
Cache write: —
Released: Jun 4, 2026
Knowledge cutoff: —
Takes in: Text
Puts out: Text
Reasoning: Yes
Tool calling: Yes
Structured output: Yes
File attachments: No
Access: Open weights
License: NVIDIA Open Model license
Rarity: Uncommon
Set number: 915/1040

Open NVIDIA docs Where to run it 18 Meet its creature Battle Gemini 3.5 Flash Lite

No matching Hugging Face repo was found, so this shows NVIDIA’s usual open-weight license. Check the model card before relying on it. Specs from models.dev, last changed Oct 18, 2026. Official source: docs.api.nvidia.com.

How good is it?

Public leaderboard scores for Nemotron 3 Ultra 550B A55B, refreshed daily from Epoch AI and LMArena.

No public leaderboard lists Nemotron 3 Ultra 550B A55B yet. Epoch AI and LMArena cover most chat, image, and video models from the big labs; embeddings, speech, and small open models mostly go unrated.

Where to run it

18 providers sell Nemotron 3 Ultra 550B A55B through an API. Prices are per million tokens, cheapest first.

Cheapestrouting.run$0.10 in · $0.10 out
Free to try7 providersAIHubMix, Bothub, Kenari, …
From the labNvidia$0.50 in · $2.50 out

API providers

Provider	Input	Output	Context
AIHubMixFree`nemotron-3-ultra-550b-a55b-free`	Free	Free	1M
BothubFree`nemotron-3-ultra-550b-a55b:free`	Free	Free	1M
KenariFree`nemotron-3-ultra-550b-a55b`	Free	Free	1M
Kilo GatewayFree`nvidia/nemotron-3-ultra-550b-a55b:free`	Free	Free	1M
OpenRouterFree`nvidia/nemotron-3-ultra-550b-a55b:free`	Free	Free	1M
RequestyFree`nemotron-3-ultra-550b-a55b`	Free	Free	1.05M
UnoRouterFree`nemotron-3-ultra-550b-a55b:free`	Free	Free	1M
routing.runCheapest paid`nemotron-3-ultra`	$0.10	$0.10	131K
DevPass (LLM Gateway)`nemotron-3-ultra-550b`	$0.50	$2.20	1.05M
Eden AI`deepinfra/nemotron-3-ultra-550b-a55b`	$0.50	$2.20	262K

Show 8 more providers

Provider	Input	Output	Context
CommandCode`nvidia/nemotron-3-ultra-550b-a55b`	$0.60	$2.40	1M
Fireworks AI`accounts/fireworks/models/nemotron-3-ultra-nvfp4`	$0.60	$2.40	262K
Vercel AI Gateway`nvidia/nemotron-3-ultra-550b-a55b`	$0.60	$2.40	1M
NanoGPT`nvidia/nemotron-3-ultra-550b-a55b`	$0.50	$2.50	1M
NvidiaOfficial`nvidia/nemotron-3-ultra-550b-a55b`	$0.50	$2.50	1M
Pioneer`nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16`	$0.50	$2.50	1M
Nebius Token Factory`nvidia/Nemotron-3-Ultra-550b-a55b`	$1.00	$3.00	1.05M
Together AI`nvidia/nemotron-3-ultra-550b-a55b`	$0.60	$3.60	512K

From models.dev and Hugging Face, checked daily. Resellers’ listings can lag behind their price pages, so confirm with the provider before you commit.

Face off

Current text models from other labs at a similar output price.