Instructions to use txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx 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("txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx")

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 txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx with Pi:

Start the MLX server

# Install MLX LM:
uv tool install mlx-lm
# Start a local OpenAI-compatible server:
mlx_lm.server --model "txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx"

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": "txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx"
        }
      ]
    }
  }
}

Run Pi

# Start Pi in your project directory:
pi

MLX LM

How to use txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx with MLX LM:

Generate or start a chat session

# Install MLX LM
uv tool install mlx-lm
# Interactive chat REPL
mlx_lm.chat --model "txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx"

Run an OpenAI-compatible server

# Install MLX LM
uv tool install mlx-lm
# Start the server
mlx_lm.server --model "txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx"
# Calling the OpenAI-compatible server with curl
curl -X POST "http://localhost:8000/v1/chat/completions" \
   -H "Content-Type: application/json" \
   --data '{
     "model": "txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx",
     "messages": [
       {"role": "user", "content": "Hello"}
     ]
   }'

Hermes Agent

How to use txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx 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 "txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx"

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 txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx

Run Hermes

hermes

Atomic Chat

OpenClaw

How to use txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx with OpenClaw:

Start the MLX server

# Install MLX LM:
uv tool install mlx-lm
# Start a local OpenAI-compatible server:
mlx_lm.server --model "txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx"

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 "txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx" \
  --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"

gpt-oss-120b-Derestricted-mxfp4-mlx

MLX MXFP4 quantization of ArliAI/gpt-oss-120b-Derestricted.

Model Capabilities

Reasoning: Configurable effort (low/medium/high) via reasoning_effort parameter
Tool Use: Native function calling support
Context: 131k tokens

Quantization Details

Matches OpenAI's original MXFP4 quantization scheme:

Component	Bits	Group Size	Format
MLP Experts	4	32	MXFP4
Attention	-	-	Full precision (bfloat16)
Routers	-	-	Full precision (bfloat16)
Embeddings	-	-	Full precision (bfloat16)
LM Head	-	-	Full precision (bfloat16)

Usage

mlx-lm

mlx_lm.chat --model txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx

LM Studio

For full Reasoning Effort support in LM Studio, install via:

lms get txgsync/gpt-oss-120b-derestricted

This downloads the model with the virtual model wrapper that enables the Reasoning Effort selector.

Notes

Requires mlx-lm with gpt_oss HF format support
Quantization matches OpenAI's modules_to_not_convert scheme for optimal quality

Downloads last month: 124

Safetensors

Model size

117B params

Tensor type

BF16

U32

MLX

Hardware compatibility

4-bit

Model tree for txgsync/gpt-oss-120b-Derestricted-mxfp4-mlx

Base model

openai/gpt-oss-120b

Finetuned

ArliAI/gpt-oss-120b-Derestricted

Quantized

(8)

this model