How to use from
Pi
Start the llama.cpp server
# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama serve -hf tarruda/Qwen3.5-397B-A17B-heretic-smol-IQ2_XS-GGUF:IQ2_XS
Configure the model in Pi
# Install Pi:
npm install -g @mariozechner/pi-coding-agent
# Add to ~/.pi/agent/models.json:
{
  "providers": {
    "llama-cpp": {
      "baseUrl": "http://localhost:8080/v1",
      "api": "openai-completions",
      "apiKey": "none",
      "models": [
        {
          "id": "tarruda/Qwen3.5-397B-A17B-heretic-smol-IQ2_XS-GGUF:IQ2_XS"
        }
      ]
    }
  }
}
Run Pi
# Start Pi in your project directory:
pi
Quick Links

This is just Qwen 3.5 397B heretic quantized down to 2.46 BPW using ubergarm smol-IQ2_XS recipe (https://huggingface.co/ubergarm/Qwen3.5-397B-A17B-GGUF).

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GGUF
Model size
396B params
Architecture
qwen35moe
Hardware compatibility
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