How to use from
Pi
Start the MLX server
# Install MLX LM:
uv tool install mlx-lm
# Start a local OpenAI-compatible server:
mlx_lm.server --model "bearzi/Qwen3-Coder-Next-oQ4"
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": "bearzi/Qwen3-Coder-Next-oQ4"
        }
      ]
    }
  }
}
Run Pi
# Start Pi in your project directory:
pi
Quick Links

Qwen3-Coder-Next-oQ4

oQ4 mixed-precision MLX quantization produced via oMLX.

  • Quantization: oQ4 (sensitivity-driven mixed precision, group_size=64)
  • Format: MLX safetensors
  • Compatible with: mlx-lm, mlx-vlm, oMLX on Apple Silicon

Usage

from mlx_lm import load, generate
model, tokenizer = load("bearzi/Qwen3-Coder-Next-oQ4")
prompt = tokenizer.apply_chat_template(
    [{"role": "user", "content": "Hello"}],
    add_generation_prompt=True,
)
print(generate(model, tokenizer, prompt=prompt, max_tokens=512, verbose=True))

About oQ

oQ measures per-layer quantization sensitivity through calibration and allocates bits where they matter most — critical layers stay at higher precision, tolerant layers compress aggressively. Target averages of 2/3/4/6/8 bits are provided; actual per-layer bits vary by measured sensitivity.

See oQ documentation.

Comparative benchmarks and feedback welcome — please open a discussion.

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