Instructions to use majentik/Mistral-Medium-3.5-128B-MLX-5bit with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use majentik/Mistral-Medium-3.5-128B-MLX-5bit with MLX:

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

from mlx_vlm import load, generate
from mlx_vlm.prompt_utils import apply_chat_template
from mlx_vlm.utils import load_config

# Load the model
model, processor = load("majentik/Mistral-Medium-3.5-128B-MLX-5bit")
config = load_config("majentik/Mistral-Medium-3.5-128B-MLX-5bit")

# Prepare input
image = ["http://images.cocodataset.org/val2017/000000039769.jpg"]
prompt = "Describe this image."

# Apply chat template
formatted_prompt = apply_chat_template(
    processor, config, prompt, num_images=1
)

# Generate output
output = generate(model, processor, formatted_prompt, image)
print(output)

Notebooks
Google Colab
Kaggle
Local Apps Settings
LM Studio

How to use majentik/Mistral-Medium-3.5-128B-MLX-5bit with Pi:

Start the MLX server

# Install MLX LM:
uv tool install mlx-lm
# Start a local OpenAI-compatible server:
mlx_lm.server --model "majentik/Mistral-Medium-3.5-128B-MLX-5bit"

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": "majentik/Mistral-Medium-3.5-128B-MLX-5bit"
        }
      ]
    }
  }
}

Run Pi

# Start Pi in your project directory:
pi

OpenClaw new

How to use majentik/Mistral-Medium-3.5-128B-MLX-5bit with OpenClaw:

Start the MLX server

# Install MLX LM:
uv tool install mlx-lm
# Start a local OpenAI-compatible server:
mlx_lm.server --model "majentik/Mistral-Medium-3.5-128B-MLX-5bit"

Configure OpenClaw

# Install OpenClaw:
npm install -g openclaw@latest
# Register the local server and set it as the default model:
openclaw onboard --non-interactive --mode local \
  --auth-choice custom-api-key \
  --custom-base-url http://127.0.0.1:8080/v1 \
  --custom-model-id "majentik/Mistral-Medium-3.5-128B-MLX-5bit" \
  --custom-provider-id mlx-lm \
  --custom-compatibility openai \
  --custom-text-input \
  --accept-risk \
  --skip-health

Run OpenClaw

openclaw agent --local --agent main --message "Hello from Hugging Face"

Hermes Agent

How to use majentik/Mistral-Medium-3.5-128B-MLX-5bit 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 "majentik/Mistral-Medium-3.5-128B-MLX-5bit"

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 majentik/Mistral-Medium-3.5-128B-MLX-5bit

Run Hermes

hermes

Atomic Chat

Mistral-Medium-3.5-128B-MLX-5bit

MLX 5bit (affine, group size 64) quantized variant of mistralai/Mistral-Medium-3.5-128B (text tower quantized; vision tower and projector retained in BF16; source checkpoint is FP8) for Apple silicon via mlx-lm.

Provenance

Source: mistralai/Mistral-Medium-3.5-128B @ revision 22b2b868a15677cfa6061277ed2f653d1349a9ab (Modified MIT — revenue carve-out below $20M/month).
Quantized with mlx_lm.convert (mlx-lm 0.31.3): affine, 5-bit, group size 64.

Smoke gate

Before upload this pack passed a deterministic coherence gate: greedy 48-token chat generation loaded through mlx_lm.load, judged for emptiness, repetition loops, multi-script gibberish, and special-token debris. Verdict: ok.

Usage

pip install mlx-lm
mlx_lm.generate --model majentik/Mistral-Medium-3.5-128B-MLX-5bit --prompt "Hello"

License

Modified MIT (upstream LICENSE): free use with a revenue carve-out — organisations above $20M/month revenue need a commercial agreement with Mistral AI. This is not a plain MIT license; read the upstream terms before commercial deployment.

Available tiers

Repo	Quant
majentik/Mistral-Medium-3.5-128B-MLX-2bit	2bit
majentik/Mistral-Medium-3.5-128B-MLX-3bit	3bit
majentik/Mistral-Medium-3.5-128B-MLX-4bit	4bit
majentik/Mistral-Medium-3.5-128B-MLX-5bit	5bit
majentik/Mistral-Medium-3.5-128B-MLX-6bit	6bit
majentik/Mistral-Medium-3.5-128B-MLX-MXFP4	MXFP4

Downloads last month: 26

Safetensors

Model size

27B params

Tensor type

BF16

U32

MLX

Hardware compatibility

5-bit

Model tree for majentik/Mistral-Medium-3.5-128B-MLX-5bit

Base model

mistralai/Mistral-Medium-3.5-128B

Quantized

(31)

this model