Instructions to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with llama-cpp-python:

# !pip install llama-cpp-python

from llama_cpp import Llama

llm = Llama.from_pretrained(
	repo_id="igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF",
	filename="gemma-4-12B-it-qat-q4_0-unquantized-heretic-Q4_0.gguf",
)

llm.create_chat_completion(
	messages = [
		{
			"role": "user",
			"content": "What is the capital of France?"
		}
	]
)

Notebooks
Google Colab
Kaggle
Local Apps Settings

llama.cpp

How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with llama.cpp:

Install (macOS, Linux)

curl -LsSf https://llama.app/install.sh | sh
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M
# Run inference directly in the terminal:
llama cli -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

Install from WinGet (Windows)

winget install llama.cpp
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M
# Run inference directly in the terminal:
llama cli -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

Use pre-built binary

# Download pre-built binary from:
# https://github.com/ggerganov/llama.cpp/releases
# Start a local OpenAI-compatible server with a web UI:
./llama-server -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M
# Run inference directly in the terminal:
./llama-cli -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

Build from source code

git clone https://github.com/ggerganov/llama.cpp.git
cd llama.cpp
cmake -B build
cmake --build build -j --target llama-server llama-cli
# Start a local OpenAI-compatible server with a web UI:
./build/bin/llama-server -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M
# Run inference directly in the terminal:
./build/bin/llama-cli -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

Use Docker

docker model run hf.co/igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

LM Studio
Jan

vLLM

How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Use Docker

docker model run hf.co/igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

Ollama
How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with Ollama:
```
ollama run hf.co/igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M
```

Unsloth Studio

How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with Unsloth Studio:

Install Unsloth Studio (macOS, Linux, WSL)

curl -fsSL https://unsloth.ai/install.sh | sh
# Run unsloth studio
unsloth studio -H 0.0.0.0 -p 8888
# Then open http://localhost:8888 in your browser
# Search for igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF to start chatting

Install Unsloth Studio (Windows)

irm https://unsloth.ai/install.ps1 | iex
# Run unsloth studio
unsloth studio -H 0.0.0.0 -p 8888
# Then open http://localhost:8888 in your browser
# Search for igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF to start chatting

Using HuggingFace Spaces for Unsloth

# No setup required
# Open https://huggingface.co/spaces/unsloth/studio in your browser
# Search for igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF to start chatting

How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with Pi:

Start the llama.cpp server

# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama serve -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

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": "igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M"
        }
      ]
    }
  }
}

Run Pi

# Start Pi in your project directory:
pi

Hermes Agent new

How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with Hermes Agent:

Start the llama.cpp server

# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama serve -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

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 igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

Run Hermes

hermes

Atomic Chat new

OpenClaw new

How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with OpenClaw:

Start the llama.cpp server

# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama serve -hf igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

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 "igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M" \
  --custom-provider-id llama-cpp \
  --custom-compatibility openai \
  --custom-text-input \
  --accept-risk \
  --skip-health

Run OpenClaw

openclaw agent --local --agent main --message "Hello from Hugging Face"

Docker Model Runner
How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with Docker Model Runner:
```
docker model run hf.co/igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M
```

Lemonade

How to use igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF with Lemonade:

Pull the model

# Download Lemonade from https://lemonade-server.ai/
lemonade pull igorls/gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF:Q4_K_M

Run and chat with the model

lemonade run user.gemma-4-12B-it-qat-q4_0-unquantized-heretic-GGUF-Q4_K_M

List all available models

lemonade list

Effectiveness of qat on gguf sizes

by GiusTex - opened Jun 6

Discussion

GiusTex

Jun 6

•

edited Jun 6

Thanks for the new model version! Heretic qat Q4_0 gguf looks like a fine addition.
Don't mind my list of changed titles, I wrote this post and then searched for info while waiting for an answer, and as I updated the post I kept finding new info...

Quick question, about the "qat" part in Q4_K_M and Q8: google wrote (https://huggingface.co/google/gemma-4-12B-it-qat-q4_0-unquantized) that qat works on Q4_0, as you did (Quantization-aware training was calibrated specifically for the Q4_0 grid, so Q4_0 is the quant that realizes the QAT advantage), but then you proceeded creating qat_Q4_K_M and qat_Q8, so I wondered: have you found them useful? Like, different from your heretic_Q4_K_M and heretic_Q8 that do not have the qat implementation

GiusTex changed discussion title from Adding more size versions to Qat works only on specific gguf sizes? Jun 6

GiusTex changed discussion title from Qat works only on specific gguf sizes? to Does qat work only on specific gguf sizes? Jun 6

GiusTex changed discussion title from Does qat work only on specific gguf sizes? to Effectiveness of qat on gguf sizes Jun 6

igorls

Owner Jun 7

•

edited Jun 7

Thanks for the new model version! Heretic qat Q4_0 gguf looks like a fine addition.
Don't mind my list of changed titles, I wrote this post and then searched for info while waiting for an answer, and as I updated the post I kept finding new info...

Quick question, about the "qat" part in Q4_K_M and Q8: google wrote (https://huggingface.co/google/gemma-4-12B-it-qat-q4_0-unquantized) that qat works on Q4_0, as you did (Quantization-aware training was calibrated specifically for the Q4_0 grid, so Q4_0 is the quant that realizes the QAT advantage), but then you proceeded creating qat_Q4_K_M and qat_Q8, so I wondered: have you found them useful? Like, different from your heretic_Q4_K_M and heretic_Q8 that do not have the qat implementation

Thanks! Glad it's useful!

so use Q4_0 to actually get the QAT benefit, Q8_0 for near-lossless, and Q4_K_M as a solid general 4-bit option that isn't really leveraging QAT

Q4_K_M uses a different (K-quant) scheme than the Q4_0 grid QAT was tuned for, so the advantage doesn't cleanly transfer
most of its quality comes from the K-quant scheme itself. It might be marginally better than a non-QAT Q4_K_M since QAT weights tend to be a bit more quantization-friendly, but I wouldn't expect a large gap.

Uploaded mainly as a drop-in for folks who standardize on Q4_K_M.

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