Instructions to use inferencerlabs/openai-gpt-oss-120b-MLX-Q6 with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use inferencerlabs/openai-gpt-oss-120b-MLX-Q6 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("inferencerlabs/openai-gpt-oss-120b-MLX-Q6")

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 inferencerlabs/openai-gpt-oss-120b-MLX-Q6 with Pi:

Start the MLX server

# Install MLX LM:
uv tool install mlx-lm
# Start a local OpenAI-compatible server:
mlx_lm.server --model "inferencerlabs/openai-gpt-oss-120b-MLX-Q6"

Configure the model in Pi

# Install Pi:
npm install -g @earendil-works/pi-coding-agent
# Add to ~/.pi/agent/models.json:
{
  "providers": {
    "mlx-lm": {
      "baseUrl": "http://localhost:8080/v1",
      "api": "openai-completions",
      "apiKey": "none",
      "models": [
        {
          "id": "inferencerlabs/openai-gpt-oss-120b-MLX-Q6"
        }
      ]
    }
  }
}

Run Pi

# Start Pi in your project directory:
pi

MLX LM

How to use inferencerlabs/openai-gpt-oss-120b-MLX-Q6 with MLX LM:

Generate or start a chat session

# Install MLX LM
uv tool install mlx-lm
# Interactive chat REPL
mlx_lm.chat --model "inferencerlabs/openai-gpt-oss-120b-MLX-Q6"

Run an OpenAI-compatible server

# Install MLX LM
uv tool install mlx-lm
# Start the server
mlx_lm.server --model "inferencerlabs/openai-gpt-oss-120b-MLX-Q6"
# Calling the OpenAI-compatible server with curl
curl -X POST "http://localhost:8000/v1/chat/completions" \
   -H "Content-Type: application/json" \
   --data '{
     "model": "inferencerlabs/openai-gpt-oss-120b-MLX-Q6",
     "messages": [
       {"role": "user", "content": "Hello"}
     ]
   }'

Hermes Agent

How to use inferencerlabs/openai-gpt-oss-120b-MLX-Q6 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 "inferencerlabs/openai-gpt-oss-120b-MLX-Q6"

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 inferencerlabs/openai-gpt-oss-120b-MLX-Q6

Run Hermes

hermes

Atomic Chat

OpenClaw

How to use inferencerlabs/openai-gpt-oss-120b-MLX-Q6 with OpenClaw:

Start the MLX server

# Install MLX LM:
uv tool install mlx-lm
# Start a local OpenAI-compatible server:
mlx_lm.server --model "inferencerlabs/openai-gpt-oss-120b-MLX-Q6"

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 "inferencerlabs/openai-gpt-oss-120b-MLX-Q6" \
  --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"

openai-gpt-oss-120b-MLX-Q6 / README.md

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metadata

license: apache-2.0
pipeline_tag: text-generation
library_name: mlx
tags:
  - vllm
  - mlx
base_model: openai/gpt-oss-120b

Notice

This quant is deprecated. It was used as a stopgap while support for the native MXFP4 was being implemented.
Please use the native MXFP4 model found here OpenAI gpt-oss-120b

Information

See gpt-oss-120b 6.5bit MLX in action - demonstration video

q6.5bit quant typically achieves 1.128 perplexity in our testing which is equivalent to q8.

Quantization	Perplexity
q2	41.293
q3	1.900
q4	1.168
q6	1.128
q8	1.128

Usage Notes

Tested to run with Inferencer app
Memory usage: ~95 GB
Expect ~60 tokens/s
Quantized with a modified version of MLX 0.26
For more details see demonstration video or visit OpenAI gpt-oss-120b.

Disclaimer

We are not the creator, originator, or owner of any model listed. Each model is created and provided by third parties. Models may not always be accurate or contextually appropriate. You are responsible for verifying the information before making important decisions. We are not liable for any damages, losses, or issues arising from its use, including data loss or inaccuracies in AI-generated content.