π Model Description
quantized_by: bartowski pipeline_tag: text-generation basemodelrelation: quantized base_model: p-e-w/gpt-oss-20b-heretic license: apache-2.0 tags:
- vllm
- heretic
- uncensored
- decensored
- abliterated
Llamacpp imatrix Quantizations of gpt-oss-20b-heretic by p-e-w
Using llama.cpp release b7049 for quantization.
Original model: https://huggingface.co/p-e-w/gpt-oss-20b-heretic
All quants made using imatrix option with dataset from here combined with a subset of combinedallsmall.parquet from Ed Addario here
Run them in LM Studio
Run them directly with llama.cpp, or any other llama.cpp based project
Prompt format
No chat template specified so default is used. This may be incorrect, check original model card for details.
<|start|>system<|message|>You are ChatGPT, a large language model trained by OpenAI.
Knowledge cutoff: 2024-06
Current date: 2025-11-16
Reasoning: medium
Valid channels: analysis, commentary, final. Channel must be included for every message.<|end|><|start|>developer<|message|># Instructions
{system_prompt}
<|end|><|start|>user<|message|>{prompt}<|end|><|start|>assistant
Download a file (not the whole branch) from below:
| Filename | Quant type | File Size | Split | Description |
|---|---|---|---|---|
| gpt-oss-20b-heretic-bf16.gguf | bf16 | 41.86GB | false | Full BF16 weights. |
| gpt-oss-20b-heretic-Q6KL.gguf | Q6KL | 22.19GB | false | Uses Q80 for embed and output weights. Very high quality, near perfect, recommended. |
| gpt-oss-20b-heretic-Q6K.gguf | Q6K | 22.19GB | false | Very high quality, near perfect, recommended. |
| gpt-oss-20b-heretic-Q5KL.gguf | Q5KL | 17.09GB | false | Uses Q80 for embed and output weights. High quality, recommended. |
| gpt-oss-20b-heretic-Q5KM.gguf | Q5K_M | 16.90GB | false | High quality, recommended. |
| gpt-oss-20b-heretic-Q4KL.gguf | Q4KL | 16.07GB | false | Uses Q80 for embed and output weights. Good quality, recommended. |
| gpt-oss-20b-heretic-Q5KS.gguf | Q5K_S | 15.90GB | false | High quality, recommended. |
| gpt-oss-20b-heretic-Q4KM.gguf | Q4K_M | 15.85GB | false | Good quality, default size for most use cases, recommended. |
| gpt-oss-20b-heretic-Q4KS.gguf | Q4K_S | 14.85GB | false | Slightly lower quality with more space savings, recommended. |
| gpt-oss-20b-heretic-Q3KXL.gguf | Q3KXL | 12.97GB | false | Uses Q80 for embed and output weights. Lower quality but usable, good for low RAM availability. |
| gpt-oss-20b-heretic-Q3KL.gguf | Q3K_L | 12.68GB | false | Lower quality but usable, good for low RAM availability. |
| gpt-oss-20b-heretic-Q3KM.gguf | Q3K_M | 12.55GB | false | Low quality. |
| gpt-oss-20b-heretic-IQ3M.gguf | IQ3M | 12.55GB | false | Medium-low quality, new method with decent performance comparable to Q3KM. |
| gpt-oss-20b-heretic-Q2KL.gguf | Q2KL | 12.45GB | false | Uses Q80 for embed and output weights. Very low quality but surprisingly usable. |
| gpt-oss-20b-heretic-IQ4XS.gguf | IQ4XS | 12.16GB | false | Decent quality, smaller than Q4KS with similar performance, recommended. |
| gpt-oss-20b-heretic-IQ3XS.gguf | IQ3XS | 12.16GB | false | Lower quality, new method with decent performance, slightly better than Q3KS. |
| gpt-oss-20b-heretic-IQ3XXS.gguf | IQ3XXS | 12.16GB | false | Lower quality, new method with decent performance, comparable to Q3 quants. |
| gpt-oss-20b-heretic-Q2K.gguf | Q2K | 12.16GB | false | Very low quality but surprisingly usable. |
| gpt-oss-20b-heretic-Q3KS.gguf | Q3K_S | 12.15GB | false | Low quality, not recommended. |
| gpt-oss-20b-heretic-IQ2M.gguf | IQ2M | 12.14GB | false | Relatively low quality, uses SOTA techniques to be surprisingly usable. |
| gpt-oss-20b-heretic-Q80.gguf | Q80 | 12.11GB | false | Extremely high quality, generally unneeded but max available quant. |
| gpt-oss-20b-heretic-MXFP4MOE.gguf | MXFP4MOE | 12.11GB | false | Special format for OpenAI's gpt-oss models, see: https://github.com/ggml-org/llama.cpp/pull/15091 |
| gpt-oss-20b-heretic-Q41.gguf | Q41 | 11.59GB | false | Legacy format, similar performance to Q4KS but with improved tokens/watt on Apple silicon. |
| gpt-oss-20b-heretic-IQ4NL.gguf | IQ4NL | 11.56GB | false | Similar to IQ4_XS, but slightly larger. Offers online repacking for ARM CPU inference. |
| gpt-oss-20b-heretic-Q40.gguf | Q40 | 11.52GB | false | Legacy format, offers online repacking for ARM and AVX CPU inference. |
Embed/output weights
Some of these quants (Q3KXL, Q4KL etc) are the standard quantization method with the embeddings and output weights quantized to Q8_0 instead of what they would normally default to.
Downloading using huggingface-cli
Click to view download instructions
First, make sure you have hugginface-cli installed:
pip install -U "huggingface_hub[cli]"Then, you can target the specific file you want:
huggingface-cli download bartowski/p-e-wgpt-oss-20b-heretic-GGUF --include "p-e-wgpt-oss-20b-heretic-Q4KM.gguf" --local-dir ./If the model is bigger than 50GB, it will have been split into multiple files. In order to download them all to a local folder, run:
huggingface-cli download bartowski/p-e-wgpt-oss-20b-heretic-GGUF --include "p-e-wgpt-oss-20b-heretic-Q8_0/*" --local-dir ./You can either specify a new local-dir (p-e-wgpt-oss-20b-heretic-Q80) or download them all in place (./)
ARM/AVX information
Previously, you would download Q4044/48/8_8, and these would have their weights interleaved in memory in order to improve performance on ARM and AVX machines by loading up more data in one pass.
Now, however, there is something called "online repacking" for weights. details in this PR. If you use Q40 and your hardware would benefit from repacking weights, it will do it automatically on the fly.
As of llama.cpp build b4282 you will not be able to run the Q40XX files and will instead need to use Q4_0.
Additionally, if you want to get slightly better quality for , you can use IQ4NL thanks to this PR which will also repack the weights for ARM, though only the 4_4 for now. The loading time may be slower but it will result in an overall speed incrase.
Click to view Q40X_X information (deprecated
I'm keeping this section to show the potential theoretical uplift in performance from using the Q4_0 with online repacking.
Click to view benchmarks on an AVX2 system (EPYC7702)
| model | size | params | backend | threads | test | t/s | % (vs Q4_0) |
|---|---|---|---|---|---|---|---|
| qwen2 3B Q4_0 | 1.70 GiB | 3.09 B | CPU | 64 | pp512 | 204.03 Β± 1.03 | 100% |
| qwen2 3B Q4_0 | 1.70 GiB | 3.09 B | CPU | 64 | pp1024 | 282.92 Β± 0.19 | 100% |
| qwen2 3B Q4_0 | 1.70 GiB | 3.09 B | CPU | 64 | pp2048 | 259.49 Β± 0.44 | 100% |
| qwen2 3B Q4_0 | 1.70 GiB | 3.09 B | CPU | 64 | tg128 | 39.12 Β± 0.27 | 100% |
| qwen2 3B Q4_0 | 1.70 GiB | 3.09 B | CPU | 64 | tg256 | 39.31 Β± 0.69 | 100% |
| qwen2 3B Q4_0 | 1.70 GiB | 3.09 B | CPU | 64 | tg512 | 40.52 Β± 0.03 | 100% |
| qwen2 3B Q4KM | 1.79 GiB | 3.09 B | CPU | 64 | pp512 | 301.02 Β± 1.74 | 147% |
| qwen2 3B Q4KM | 1.79 GiB | 3.09 B | CPU | 64 | pp1024 | 287.23 Β± 0.20 | 101% |
| qwen2 3B Q4KM | 1.79 GiB | 3.09 B | CPU | 64 | pp2048 | 262.77 Β± 1.81 | 101% |
| qwen2 3B Q4KM | 1.79 GiB | 3.09 B | CPU | 64 | tg128 | 18.80 Β± 0.99 | 48% |
| qwen2 3B Q4KM | 1.79 GiB | 3.09 B | CPU | 64 | tg256 | 24.46 Β± 3.04 | 83% |
| qwen2 3B Q4KM | 1.79 GiB | 3.09 B | CPU | 64 | tg512 | 36.32 Β± 3.59 | 90% |
| qwen2 3B Q408_8 | 1.69 GiB | 3.09 B | CPU | 64 | pp512 | 271.71 Β± 3.53 | 133% |
| qwen2 3B Q408_8 | 1.69 GiB | 3.09 B | CPU | 64 | pp1024 | 279.86 Β± 45.63 | 100% |
| qwen2 3B Q408_8 | 1.69 GiB | 3.09 B | CPU | 64 | pp2048 | 320.77 Β± 5.00 | 124% |
| qwen2 3B Q408_8 | 1.69 GiB | 3.09 B | CPU | 64 | tg128 | 43.51 Β± 0.05 | 111% |
| qwen2 3B Q408_8 | 1.69 GiB | 3.09 B | CPU | 64 | tg256 | 43.35 Β± 0.09 | 110% |
| qwen2 3B Q408_8 | 1.69 GiB | 3.09 B | CPU | 64 | tg512 | 42.60 Β± 0.31 | 105% |
Which file should I choose?
Click here for details
A great write up with charts showing various performances is provided by Artefact2 here
The first thing to figure out is how big a model you can run. To do this, you'll need to figure out how much RAM and/or VRAM you have.
If you want your model running as FAST as possible, you'll want to fit the whole thing on your GPU's VRAM. Aim for a quant with a file size 1-2GB smaller than your GPU's total VRAM.
If you want the absolute maximum quality, add both your system RAM and your GPU's VRAM together, then similarly grab a quant with a file size 1-2GB Smaller than that total.
Next, you'll need to decide if you want to use an 'I-quant' or a 'K-quant'.
If you don't want to think too much, grab one of the K-quants. These are in format 'QXKX', like Q5KM.
If you want to get more into the weeds, you can check out this extremely useful feature chart:
But basically, if you're aiming for below Q4, and you're running cuBLAS (Nvidia) or rocBLAS (AMD), you should look towards the I-quants. These are in format IQXX, like IQ3M. These are newer and offer better performance for their size.
These I-quants can also be used on CPU, but will be slower than their K-quant equivalent, so speed vs performance is a tradeoff you'll have to decide.
Credits
Thank you kalomaze and Dampf for assistance in creating the imatrix calibration dataset.
Thank you ZeroWw for the inspiration to experiment with embed/output.
Thank you to LM Studio for sponsoring my work.
Want to support my work? Visit my ko-fi page here: https://ko-fi.com/bartowski
π GGUF File List
| π Filename | π¦ Size | β‘ Download |
|---|---|---|
|
p-e-w_gpt-oss-20b-heretic-IQ2_M.gguf
LFS
Q2
|
11.31 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-IQ3_M.gguf
LFS
Q3
|
11.69 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-IQ3_XS.gguf
LFS
Q3
|
11.32 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-IQ3_XXS.gguf
LFS
Q3
|
11.32 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-IQ4_NL.gguf
LFS
Q4
|
10.77 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-IQ4_XS.gguf
LFS
Q4
|
11.32 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-MXFP4_MOE.gguf
LFS
|
11.28 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q2_K.gguf
LFS
Q2
|
11.32 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q2_K_L.gguf
LFS
Q2
|
11.59 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q3_K_L.gguf
LFS
Q3
|
11.81 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q3_K_M.gguf
LFS
Q3
|
11.69 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q3_K_S.gguf
LFS
Q3
|
11.32 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q3_K_XL.gguf
LFS
Q3
|
12.08 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q4_0.gguf
Recommended
LFS
Q4
|
10.73 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q4_1.gguf
LFS
Q4
|
10.8 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q4_K_L.gguf
LFS
Q4
|
14.97 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q4_K_M.gguf
LFS
Q4
|
14.76 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q4_K_S.gguf
LFS
Q4
|
13.83 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q5_K_L.gguf
LFS
Q5
|
15.91 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q5_K_M.gguf
LFS
Q5
|
15.74 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q5_K_S.gguf
LFS
Q5
|
14.81 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q6_K.gguf
LFS
Q6
|
20.67 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q6_K_L.gguf
LFS
Q6
|
20.67 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-Q8_0.gguf
LFS
Q8
|
11.28 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-bf16.gguf
LFS
FP16
|
38.99 GB | Download |
|
p-e-w_gpt-oss-20b-heretic-imatrix.gguf
LFS
|
26.78 MB | Download |