DreamFast

qwen3-8b-heretic

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README

License: apache-2.0

Model Details

Base Model: Qwen/Qwen3-8B
Abliteration Method: Heretic v1.2.0 (git master, commit 19cdf7e)
Trials: 3000
Trial Selected: Trial 2681
Refusals: 13/100 (vs 100/100 original)
KL Divergence: 0.0838 (minimal model damage)

Files

HuggingFace Format (for transformers, llama.cpp conversion)

text

model.safetensors (~16 GB)config.jsontokenizer.jsontokenizer_config.jsongeneration_config.jsonchat_template.jinja

ComfyUI Format (for Klein 9B text encoder)

text

comfyui/qwen3-8b-heretic.safetensors              # bf16, 16GBcomfyui/qwen3-8b-heretic_fp8_e4m3fn.safetensors   # fp8 per-tensor, 8.8GBcomfyui/qwen3-8b-heretic_int8.safetensors          # int8 ConvRot row-wise, 8.8GBcomfyui/qwen3-8b-heretic_int4.safetensors          # int4 W4A4 ConvRot, 5.6GBcomfyui/qwen3-8b-heretic_nvfp4.safetensors         # nvfp4, 6.0GBcomfyui/qwen3-8b-heretic_mxfp8.safetensors         # mxfp8, 9.0GB

Quality: All quantized variants use SVD-guided learned rounding (AdaRound via convert-to-quant), which optimizes each weight's rounding direction to minimize output reconstruction error, noticeably higher fidelity than naive round-to-nearest quantization.

GGUF Format (for llama.cpp and ComfyUI-GGUF)

Table with columns: Quant, Size, Notes
Quant	Size	Notes
F16	16GB	Lossless reference
Q8_0	8.2GB	Excellent quality
Q6_K	6.3GB	Very good quality
Q5_K_M	5.5GB	Good quality
Q5_K_S	5.4GB	Slightly smaller Q5
Q4_K_M

Quantization Format Notes

All variants load natively in ComfyUI 0.30.0+ (no plugins) via the comfy_quant metadata embedded in each file.

Table with columns: Format, Size, Bits, Notes
Format	Size	Bits	Notes
FP8 (E4M3)	8.8GB	8	Per-tensor scaled, learned rounding; Ada/Hopper+
INT8 (ConvRot row-wise)	8.8GB	8	Hadamard-rotated, per-row; broad GPU support
MXFP8	9.0GB	8	Microscaling FP8 (E8M0 block scales); Blackwell
INT4 (W4A4 ConvRot)	5.6GB	4

NVFP4/MXFP8 inference is fastest on Blackwell (RTX 5090/5080, SM100+), but ComfyUI also supports software dequantization on older GPUs (tested on RTX 4090). INT8 and INT4 both use Hadamard rotation (ConvRot); INT4 W4A4 uses ComfyUI's convrot_w4a4 path.

Usage

With ComfyUI (Klein 9B)

Download a ComfyUI format file:
- FP8 (recommended): comfyui/qwen3-8b-heretic_fp8_e4m3fn.safetensors (8.8GB)
- INT4 (smallest): comfyui/qwen3-8b-heretic_int4.safetensors (5.6GB)
- NVFP4: comfyui/qwen3-8b-heretic_nvfp4.safetensors (6.0GB)
- INT8: comfyui/qwen3-8b-heretic_int8.safetensors (8.8GB)
- MXFP8: comfyui/qwen3-8b-heretic_mxfp8.safetensors (9.0GB)
- bf16 (full precision): comfyui/qwen3-8b-heretic.safetensors (16GB)
Place in

With Transformers

python

from transformers import AutoModelForCausalLM, AutoTokenizerimport torch model = AutoModelForCausalLM.from_pretrained(    "DreamFast/qwen3-8b-heretic",    device_map="auto",    torch_dtype=torch.bfloat16,    trust_remote_code=True)tokenizer = AutoTokenizer.from_pretrained("DreamFast/qwen3-8b-heretic") prompt = "Describe a dramatic sunset over a cyberpunk city"inputs = tokenizer(prompt, return_tensors="pt").to(model.device)outputs = model.generate(**inputs, max_new_tokens=200)print(tokenizer.decode(outputs[0], skip_special_tokens=True))

With llama.cpp

bash

llama-server -m qwen3-8b-heretic-Q4_K_M.gguf

Abliteration Process

Created using Heretic v1.2.0 (git master) with 3000 optimization trials:

text

? Which trial do you want to use?  [Trial 2732] Refusals: 10/100, KL divergence: 0.1001> [Trial 2681] Refusals: 13/100, KL divergence: 0.0838  <-- selected  [Trial 2337] Refusals: 18/100, KL divergence: 0.0643  [Trial 2419] Refusals: 19/100, KL divergence: 0.0600  [Trial 2195] Refusals: 21/100, KL divergence: 0.0534  ...

Trial 2681 was selected for its balance of low refusals (13/100) and reasonable KL divergence (0.0838), indicating minimal model damage while achieving 87% of previously-refused prompts now working.

Limitations

This model inherits all limitations of the base Qwen3-8B model
Abliteration reduces but does not completely eliminate refusals (13/100 remain)
NVFP4 quantization works best on Blackwell GPUs (RTX 5090/5080) with native FP4 tensor cores, but also works on older GPUs via software dequantization

License

This model is released under the Apache 2.0 License, following the base Qwen3-8B model license.

Acknowledgments

Qwen for the Qwen3-8B model
Heretic by p-e-w for the abliteration tool
Black Forest Labs for Klein 9B
llama.cpp for GGUF conversion

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Model Details

Model Provider

DreamFast

Model Tree

Base

Qwen/Qwen3-8B

Fine-tuned

this model

Input Modalities

Text

Output Modalities

Text

Supported Functionality

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README

License: apache-2.0

Model Details

Base Model: Qwen/Qwen3-8B
Abliteration Method: Heretic v1.2.0 (git master, commit 19cdf7e)
Trials: 3000
Trial Selected: Trial 2681
Refusals: 13/100 (vs 100/100 original)
KL Divergence: 0.0838 (minimal model damage)

Files

HuggingFace Format (for transformers, llama.cpp conversion)

text

model.safetensors (~16 GB)config.jsontokenizer.jsontokenizer_config.jsongeneration_config.jsonchat_template.jinja

ComfyUI Format (for Klein 9B text encoder)

text

comfyui/qwen3-8b-heretic.safetensors              # bf16, 16GBcomfyui/qwen3-8b-heretic_fp8_e4m3fn.safetensors   # fp8 per-tensor, 8.8GBcomfyui/qwen3-8b-heretic_int8.safetensors          # int8 ConvRot row-wise, 8.8GBcomfyui/qwen3-8b-heretic_int4.safetensors          # int4 W4A4 ConvRot, 5.6GBcomfyui/qwen3-8b-heretic_nvfp4.safetensors         # nvfp4, 6.0GBcomfyui/qwen3-8b-heretic_mxfp8.safetensors         # mxfp8, 9.0GB

Quality: All quantized variants use SVD-guided learned rounding (AdaRound via convert-to-quant), which optimizes each weight's rounding direction to minimize output reconstruction error, noticeably higher fidelity than naive round-to-nearest quantization.

GGUF Format (for llama.cpp and ComfyUI-GGUF)

Table with columns: Quant, Size, Notes
Quant	Size	Notes
F16	16GB	Lossless reference
Q8_0	8.2GB	Excellent quality
Q6_K	6.3GB	Very good quality
Q5_K_M	5.5GB	Good quality
Q5_K_S	5.4GB	Slightly smaller Q5
Q4_K_M

Quantization Format Notes

All variants load natively in ComfyUI 0.30.0+ (no plugins) via the comfy_quant metadata embedded in each file.

Table with columns: Format, Size, Bits, Notes
Format	Size	Bits	Notes
FP8 (E4M3)	8.8GB	8	Per-tensor scaled, learned rounding; Ada/Hopper+
INT8 (ConvRot row-wise)	8.8GB	8	Hadamard-rotated, per-row; broad GPU support
MXFP8	9.0GB	8	Microscaling FP8 (E8M0 block scales); Blackwell
INT4 (W4A4 ConvRot)	5.6GB	4

Usage

With ComfyUI (Klein 9B)

Download a ComfyUI format file:
- FP8 (recommended): comfyui/qwen3-8b-heretic_fp8_e4m3fn.safetensors (8.8GB)
- INT4 (smallest): comfyui/qwen3-8b-heretic_int4.safetensors (5.6GB)
- NVFP4: comfyui/qwen3-8b-heretic_nvfp4.safetensors (6.0GB)
- INT8: comfyui/qwen3-8b-heretic_int8.safetensors (8.8GB)
- MXFP8: comfyui/qwen3-8b-heretic_mxfp8.safetensors (9.0GB)
- bf16 (full precision): comfyui/qwen3-8b-heretic.safetensors (16GB)
Place in

With Transformers

python

from transformers import AutoModelForCausalLM, AutoTokenizerimport torch model = AutoModelForCausalLM.from_pretrained(    "DreamFast/qwen3-8b-heretic",    device_map="auto",    torch_dtype=torch.bfloat16,    trust_remote_code=True)tokenizer = AutoTokenizer.from_pretrained("DreamFast/qwen3-8b-heretic") prompt = "Describe a dramatic sunset over a cyberpunk city"inputs = tokenizer(prompt, return_tensors="pt").to(model.device)outputs = model.generate(**inputs, max_new_tokens=200)print(tokenizer.decode(outputs[0], skip_special_tokens=True))

With llama.cpp

bash

llama-server -m qwen3-8b-heretic-Q4_K_M.gguf

Abliteration Process

Created using Heretic v1.2.0 (git master) with 3000 optimization trials:

text

? Which trial do you want to use?  [Trial 2732] Refusals: 10/100, KL divergence: 0.1001> [Trial 2681] Refusals: 13/100, KL divergence: 0.0838  <-- selected  [Trial 2337] Refusals: 18/100, KL divergence: 0.0643  [Trial 2419] Refusals: 19/100, KL divergence: 0.0600  [Trial 2195] Refusals: 21/100, KL divergence: 0.0534  ...

Trial 2681 was selected for its balance of low refusals (13/100) and reasonable KL divergence (0.0838), indicating minimal model damage while achieving 87% of previously-refused prompts now working.

Limitations

This model inherits all limitations of the base Qwen3-8B model
Abliteration reduces but does not completely eliminate refusals (13/100 remain)
NVFP4 quantization works best on Blackwell GPUs (RTX 5090/5080) with native FP4 tensor cores, but also works on older GPUs via software dequantization

License

This model is released under the Apache 2.0 License, following the base Qwen3-8B model license.

Acknowledgments

Qwen for the Qwen3-8B model
Heretic by p-e-w for the abliteration tool
Black Forest Labs for Klein 9B
llama.cpp for GGUF conversion