Instructions to use DreamFast/gemma-3-12b-it-heretic with libraries, inference providers, notebooks, and local apps. Follow these links to get started.
- Libraries
- Transformers
How to use DreamFast/gemma-3-12b-it-heretic with Transformers:
# Use a pipeline as a high-level helper from transformers import pipeline pipe = pipeline("text-generation", model="DreamFast/gemma-3-12b-it-heretic") messages = [ { "role": "user", "content": [ {"type": "image", "url": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/p-blog/candy.JPG"}, {"type": "text", "text": "What animal is on the candy?"} ] }, ] pipe(text=messages)# Load model directly from transformers import AutoProcessor, AutoModelForMultimodalLM processor = AutoProcessor.from_pretrained("DreamFast/gemma-3-12b-it-heretic") model = AutoModelForMultimodalLM.from_pretrained("DreamFast/gemma-3-12b-it-heretic", device_map="auto") messages = [ { "role": "user", "content": [ {"type": "image", "url": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/p-blog/candy.JPG"}, {"type": "text", "text": "What animal is on the candy?"} ] }, ] inputs = processor.apply_chat_template( messages, add_generation_prompt=True, tokenize=True, return_dict=True, return_tensors="pt", ).to(model.device) outputs = model.generate(**inputs, max_new_tokens=40) print(processor.decode(outputs[0][inputs["input_ids"].shape[-1]:])) - Inference
- Notebooks
- Google Colab
- Kaggle
- Local Apps Settings
- llama.cpp
How to use DreamFast/gemma-3-12b-it-heretic 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 DreamFast/gemma-3-12b-it-heretic:Q4_K_M # Run inference directly in the terminal: llama cli -hf DreamFast/gemma-3-12b-it-heretic:Q4_K_M
Install from WinGet (Windows)
winget install llama.cpp # Start a local OpenAI-compatible server with a web UI: llama serve -hf DreamFast/gemma-3-12b-it-heretic:Q4_K_M # Run inference directly in the terminal: llama cli -hf DreamFast/gemma-3-12b-it-heretic: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 DreamFast/gemma-3-12b-it-heretic:Q4_K_M # Run inference directly in the terminal: ./llama-cli -hf DreamFast/gemma-3-12b-it-heretic: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 DreamFast/gemma-3-12b-it-heretic:Q4_K_M # Run inference directly in the terminal: ./build/bin/llama-cli -hf DreamFast/gemma-3-12b-it-heretic:Q4_K_M
Use Docker
docker model run hf.co/DreamFast/gemma-3-12b-it-heretic:Q4_K_M
- LM Studio
- Jan
- vLLM
How to use DreamFast/gemma-3-12b-it-heretic with vLLM:
Install from pip and serve model
# Install vLLM from pip: pip install vllm # Start the vLLM server: vllm serve "DreamFast/gemma-3-12b-it-heretic" # Call the server using curl (OpenAI-compatible API): curl -X POST "http://localhost:8000/v1/chat/completions" \ -H "Content-Type: application/json" \ --data '{ "model": "DreamFast/gemma-3-12b-it-heretic", "messages": [ { "role": "user", "content": "What is the capital of France?" } ] }'Use Docker
docker model run hf.co/DreamFast/gemma-3-12b-it-heretic:Q4_K_M
- SGLang
How to use DreamFast/gemma-3-12b-it-heretic with SGLang:
Install from pip and serve model
# Install SGLang from pip: pip install sglang # Start the SGLang server: python3 -m sglang.launch_server \ --model-path "DreamFast/gemma-3-12b-it-heretic" \ --host 0.0.0.0 \ --port 30000 # Call the server using curl (OpenAI-compatible API): curl -X POST "http://localhost:30000/v1/chat/completions" \ -H "Content-Type: application/json" \ --data '{ "model": "DreamFast/gemma-3-12b-it-heretic", "messages": [ { "role": "user", "content": "What is the capital of France?" } ] }'Use Docker images
docker run --gpus all \ --shm-size 32g \ -p 30000:30000 \ -v ~/.cache/huggingface:/root/.cache/huggingface \ --env "HF_TOKEN=<secret>" \ --ipc=host \ lmsysorg/sglang:latest \ python3 -m sglang.launch_server \ --model-path "DreamFast/gemma-3-12b-it-heretic" \ --host 0.0.0.0 \ --port 30000 # Call the server using curl (OpenAI-compatible API): curl -X POST "http://localhost:30000/v1/chat/completions" \ -H "Content-Type: application/json" \ --data '{ "model": "DreamFast/gemma-3-12b-it-heretic", "messages": [ { "role": "user", "content": "What is the capital of France?" } ] }' - Ollama
How to use DreamFast/gemma-3-12b-it-heretic with Ollama:
ollama run hf.co/DreamFast/gemma-3-12b-it-heretic:Q4_K_M
- Unsloth Desktop
- Docker Model Runner
How to use DreamFast/gemma-3-12b-it-heretic with Docker Model Runner:
docker model run hf.co/DreamFast/gemma-3-12b-it-heretic:Q4_K_M
- Lemonade
How to use DreamFast/gemma-3-12b-it-heretic with Lemonade:
Pull the model
# Download Lemonade from https://lemonade-server.ai/ lemonade pull DreamFast/gemma-3-12b-it-heretic:Q4_K_M
Run and chat with the model
lemonade run user.gemma-3-12b-it-heretic-Q4_K_M
List all available models
lemonade list
- Atomic Chat
mat1 and mat2 shapes cannot be multiplied (4096x1152 and 4304x1152)
When I load version fp8 into the LTXV Audio Text Encoder Loader node in ComfyUI, I get this error. There is no problem with the plain model:
got prompt
[MultiGPU Core Patching] text_encoder_device_patched returning device: cuda:0 (current_text_encoder_device=cuda:0)
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CLIP/text encoder model load device: cuda:0, offload device: cpu, current: cpu, dtype: torch.float16
Requested to load LTXAVTEModel_
Model LTXAVTEModel_ prepared for dynamic VRAM loading. 25440MB Staged. 0 patches attached. Force pre-loaded 290 weights: 1497 KB.
!!! Exception during processing !!! mat1 and mat2 shapes cannot be multiplied (4096x1152 and 4304x1152)
Traceback (most recent call last):
File "I:\ComfyUI_windows_portable\ComfyUI\execution.py", line 524, in execute
output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\execution.py", line 333, in get_output_data
return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\execution.py", line 307, in async_map_node_over_list
await process_inputs(input_dict, i)
File "I:\ComfyUI_windows_portable\ComfyUI\execution.py", line 295, in process_inputs
result = f(**inputs)
^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy_api\internal_init.py", line 149, in wrapped_func
return method(locked_class, **inputs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy_api\latest_io.py", line 1764, in EXECUTE_NORMALIZED
to_return = cls.execute(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy_extras\nodes_textgen.py", line 164, in execute
return super().execute(clip, formatted_prompt, max_length, sampling_mode, image)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy_extras\nodes_textgen.py", line 56, in execute
generated_ids = clip.generate(
^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\sd.py", line 434, in generate
return self.cond_stage_model.generate(tokens, do_sample=do_sample, max_length=max_length, temperature=temperature, top_k=top_k, top_p=top_p, min_p=min_p, repetition_penalty=repetition_penalty, seed=seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\text_encoders\lt.py", line 193, in generate
return self.gemma3_12b.generate(tokens["gemma3_12b"], do_sample, max_length, temperature, top_k, top_p, min_p, repetition_penalty, seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\text_encoders\lt.py", line 96, in generate
embeds, _, _, embeds_info = self.process_tokens(tokens_only, self.execution_device)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\sd1_clip.py", line 228, in process_tokens
emb, extra = self.transformer.preprocess_embed(emb, device=device)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\text_encoders\llama.py", line 1100, in preprocess_embed
return self.multi_modal_projector(self.vision_model(image.to(device, dtype=torch.float32))[0]), None
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1775, in _wrapped_call_impl
return self._call_impl(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1786, in _call_impl
return forward_call(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\clip_model.py", line 293, in forward
x, i = self.encoder(x, mask=None, intermediate_output=intermediate_output)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1775, in _wrapped_call_impl
return self._call_impl(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1786, in _call_impl
return forward_call(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\clip_model.py", line 127, in forward
x = l(x, mask, optimized_attention)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1775, in _wrapped_call_impl
return self._call_impl(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1786, in _call_impl
return forward_call(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\clip_model.py", line 105, in forward
x += self.mlp(self.layer_norm2(x))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1775, in _wrapped_call_impl
return self._call_impl(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1786, in _call_impl
return forward_call(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\clip_model.py", line 90, in forward
x = self.fc1(x)
^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1775, in _wrapped_call_impl
return self._call_impl(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1786, in _call_impl
return forward_call(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\ops.py", line 373, in forward
return self.forward_comfy_cast_weights(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\ComfyUI_windows_portable\ComfyUI\comfy\ops.py", line 366, in forward_comfy_cast_weights
x = torch.nn.functional.linear(input, weight, bias)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: mat1 and mat2 shapes cannot be multiplied (4096x1152 and 4304x1152)
I replied the same in the other comment as the error is mentioned there too.
I had tried again with image2video, using LTX2.0 ComfyUI template. I swapped out some nodes for multi GPU nodes to avoid OOM errors and it seems it's working okay with both the fp8 and fuller version of this text encoder. I also haven't updated my ComfyUI in a couple of weeks. I was using the non distilled version with the fp8 LTX2 model. I also had updated my ComfyUI from 0.8.x to 0.16.x and is okay.
I am using https://github.com/dreamfast/ComfyUI-LTX2-MultiGPU which has the audio vae built into the model loader with the usual vae. Also looking at the original LTXV Audio VAE Loader, I can't see an option to load the text encoder.
Are you trying with the latest LTX 2.3? I haven't looked at that yet and am waiting a week or so before trying it out.
Just trying to think of things which would break it. If you can attach a workflow here or have any other info I can check it out.
I tried both LTX-2 and LTX-2.3 versions, but both threw errors. Finally, I used a script to convert it to a format that ComfyUI could handle, although it still protested against certain texts.
import torch
import os
from safetensors.torch import load_file, save_file
from huggingface_hub import hf_hub_download, list_repo_files
def convert_to_fp8_final():
model_id = "DreamFast/gemma-3-12b-it-heretic"
output_file = "gemma-3-12b-it-heretic-fp8.safetensors"
device = "cuda" if torch.cuda.is_available() else "cpu"
print(f"--- Device: {device.upper()} ---")
norm_keywords = [
'layer_norm', 'norm', 'post_layernorm', 'pre_layernorm',
'input_layernorm', 'output_layernorm', 'k_norm', 'q_norm',
'mm_soft_emb_norm', 'soft_emb_norm', 'post_attention_layernorm',
'pre_feedforward_layernorm', 'post_feedforward_layernorm'
]
print("1. Get file list...")
all_files = list_repo_files(repo_id=model_id)
safetensor_shards = sorted([
f for f in all_files
if f.endswith(".safetensors") and "/" not in f
])
if not safetensor_shards:
print("Error: No safetensors in root!")
return
full_state_dict = {}
print(f"2. {len(safetensor_shards)} processing of shards ...")
for shard_name in safetensor_shards:
print(f" -> Download and convert: {shard_name}")
path = hf_hub_download(repo_id=model_id, filename=shard_name)
shard_dict = load_file(path)
for key, tensor in shard_dict.items():
if key.startswith("language_model.model."):
new_key = key.replace("language_model.model.", "model.", 1)
elif key.startswith("vision_tower.vision_model."):
new_key = key.replace("vision_tower.vision_model.", "vision_model.", 1)
else:
new_key = key
is_norm = any(nk in key for nk in norm_keywords)
if is_norm:
converted = tensor.to(device=device, dtype=torch.bfloat16).cpu()
else:
converted = tensor.to(device=device, dtype=torch.float8_e4m3fn).cpu()
full_state_dict[new_key] = converted
del shard_dict
os.remove(path)
if device == "cuda":
torch.cuda.empty_cache()
print("3. Embedding Tokenizer into the safetensors file...")
try:
tokenizer_path = hf_hub_download(repo_id=model_id, filename="tokenizer.model")
with open(tokenizer_path, "rb") as f:
raw_bytes = f.read()
full_state_dict["spiece_model"] = torch.tensor(list(raw_bytes), dtype=torch.uint8)
os.remove(tokenizer_path)
print(" -> Tokenizer successfully embedded.")
except Exception as e:
print(f" -> Attention: tokenizer.model cannot be downloaded: {e}")
print(f"4. Save: {output_file}")
save_file(full_state_dict, output_file)
print("--- FINISHED! ---")
if name == "main":
convert_to_fp8_final()
Thanks. Yes I converted the model in a similar way to make it ComfyUI compatible and had tested both versions before releasing over a month ago. So I'm unsure what's changed recently. Once I'm able to reproduce the error I can look to fixing it up. The python above will help with that as it seems something has changed maybe with the workflow and LTX2 nodes with the recent release. I didn't try a newer workflow after updating ComfyUI.
For the model itself protesting against certain requests, I did do a deep dive into this after I released the heretic model. It does alter the embeddings it produces which does slightly alter the video generated, however the gemma model itself is rather censored. It simply just doesn't know a lot of more taboo things as it was never trained with that data initially and LTX2 model was trained on these original embeddings.
Even trying the heretic text model in llama.cpp and chatting to it, it really just doesn't know despite not refusing.
To fine tune the text encoder itself would break the DiT as the LTX2 model wont know what to do with the new embeddings and it'd make some very strange results.
So maybe the combination of a fine tuned abliterated text encoder + lora to understand the new embeddings would help. I've seen Loras for LTX but no fine tuned text encoders.
is vision files included?
You can apply gemma uncensored lora to clip with kijai nodes- Load lora (model and clip) and ONLY APPLY IT TO textgenerate it wont affect ltx clip.
https://huggingface.co/Comfy-Org/ltx-2/blob/main/split_files/loras/gemma-3-12b-it-abliterated_lora_rank64_bf16.safetensors
https://huggingface.co/Comfy-Org/ltx-2/blob/main/split_files/loras/gemma-3-12b-it-abliterated_heretic_lora_rank64_bf16.safetensors
https://huggingface.co/DreamFast/gemma-3-12b-it-heretic-v2 check out version 2 with vision support and nvfp4. I'll leave this thread open for others to read easier.
Tested okay for me here. Let me know how it goes!