Instructions to use mlx-community/Nemotron-3-Ultra-550B-A55B with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use mlx-community/Nemotron-3-Ultra-550B-A55B with MLX:

# Make sure mlx-lm is installed
# pip install --upgrade mlx-lm

# Generate text with mlx-lm
from mlx_lm import load, generate

model, tokenizer = load("mlx-community/Nemotron-3-Ultra-550B-A55B")

prompt = "Write a story about Einstein"
messages = [{"role": "user", "content": prompt}]
prompt = tokenizer.apply_chat_template(
    messages, add_generation_prompt=True
)

text = generate(model, tokenizer, prompt=prompt, verbose=True)

Notebooks
Google Colab
Kaggle
Local Apps Settings
LM Studio

How to use mlx-community/Nemotron-3-Ultra-550B-A55B with Pi:

Start the MLX server

# Install MLX LM:
uv tool install mlx-lm
# Start a local OpenAI-compatible server:
mlx_lm.server --model "mlx-community/Nemotron-3-Ultra-550B-A55B"

Configure the model in Pi

# Install Pi:
npm install -g @mariozechner/pi-coding-agent
# Add to ~/.pi/agent/models.json:
{
  "providers": {
    "mlx-lm": {
      "baseUrl": "http://localhost:8080/v1",
      "api": "openai-completions",
      "apiKey": "none",
      "models": [
        {
          "id": "mlx-community/Nemotron-3-Ultra-550B-A55B"
        }
      ]
    }
  }
}

Run Pi

# Start Pi in your project directory:
pi

Hermes Agent new

How to use mlx-community/Nemotron-3-Ultra-550B-A55B with Hermes Agent:

Start the MLX server

# Install MLX LM:
uv tool install mlx-lm
# Start a local OpenAI-compatible server:
mlx_lm.server --model "mlx-community/Nemotron-3-Ultra-550B-A55B"

Configure Hermes

# Install Hermes:
curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash
hermes setup
# Point Hermes at the local server:
hermes config set model.provider custom
hermes config set model.base_url http://127.0.0.1:8080/v1
hermes config set model.default mlx-community/Nemotron-3-Ultra-550B-A55B

Run Hermes

hermes

MLX LM

How to use mlx-community/Nemotron-3-Ultra-550B-A55B with MLX LM:

Generate or start a chat session

# Install MLX LM
uv tool install mlx-lm
# Interactive chat REPL
mlx_lm.chat --model "mlx-community/Nemotron-3-Ultra-550B-A55B"

Run an OpenAI-compatible server

# Install MLX LM
uv tool install mlx-lm
# Start the server
mlx_lm.server --model "mlx-community/Nemotron-3-Ultra-550B-A55B"
# Calling the OpenAI-compatible server with curl
curl -X POST "http://localhost:8000/v1/chat/completions" \
   -H "Content-Type: application/json" \
   --data '{
     "model": "mlx-community/Nemotron-3-Ultra-550B-A55B",
     "messages": [
       {"role": "user", "content": "Hello"}
     ]
   }'

mlx-community/Nemotron-3-Ultra-550B-A55B

An MLX conversion of nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-NVFP4, quantized for stock mlx-lm:

routed MoE experts: affine int4, group size 32, from base NVFP4
Mamba in/out projections, shared experts: affine int8, group size 64, from base FP8
attention q/k/v/o, MoE latent projections: affine int8, group size 64, from base bf16
router gate, conv1d, embeddings, lm_head: bf16

Use with mlx

pip install mlx-lm

from mlx_lm import load, generate

model, tokenizer = load("mlx-community/Nemotron-3-Ultra-550B-A55B")

prompt = "hello"

if tokenizer.chat_template is not None:
    messages = [{"role": "user", "content": prompt}]
    prompt = tokenizer.apply_chat_template(
        messages, add_generation_prompt=True
    )

response = generate(model, tokenizer, prompt=prompt, verbose=True)

Downloads last month: 90

Safetensors

Model size

108B params

Tensor type

BF16

U32

F32

MLX

Hardware compatibility

4-bit

Model tree for mlx-community/Nemotron-3-Ultra-550B-A55B

Base model

nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-NVFP4

Quantized

(1)

this model