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"

inferencerlabs commited on Dec 19, 2025

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@@ -7,6 +7,12 @@ tags:
 - mlx
 base_model: openai/gpt-oss-120b
 ---
 **See gpt-oss-120b 6.5bit MLX in action - [demonstration video](https://youtu.be/mlpFG8e_fLw)**
 *q6.5bit quant typically achieves 1.128 perplexity in our testing which is equivalent to q8.*
@@ -21,10 +27,10 @@ base_model: openai/gpt-oss-120b
 ## Usage Notes
 * Tested to run with [Inferencer app](https://inferencer.com)
-* Memory usage: ~95 GB (down from ~251GB required by native MXFP4 format)
 * Expect ~60 tokens/s
 * Quantized with a modified version of [MLX](https://github.com/ml-explore/mlx) 0.26
-* For more details see [demonstration video](https://youtu.be/mlpFG8e_fLw) or visit [OpenAI gpt-oss-20b](https://huggingface.co/openai/gpt-oss-120b).
 ## Disclaimer

 - 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](https://huggingface.co/openai/gpt-oss-120b)
+### Information
 **See gpt-oss-120b 6.5bit MLX in action - [demonstration video](https://youtu.be/mlpFG8e_fLw)**
 *q6.5bit quant typically achieves 1.128 perplexity in our testing which is equivalent to q8.*
 ## Usage Notes
 * Tested to run with [Inferencer app](https://inferencer.com)
+* Memory usage: ~95 GB
 * Expect ~60 tokens/s
 * Quantized with a modified version of [MLX](https://github.com/ml-explore/mlx) 0.26
+* For more details see [demonstration video](https://youtu.be/mlpFG8e_fLw) or visit [OpenAI gpt-oss-120b](https://huggingface.co/openai/gpt-oss-120b).
 ## Disclaimer