← back to catalog · registered 2026-08-22 13:56

mradermacher/Mellum2-12B-A2.5B-Thinking-Abliterated-i1-GGUF

mradermacher 12B GGUF MoE second-order 131K ctx
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Response includes
  • classification m8
  • files 27
  • hub_downloads_all_time 6,373
  • author_summary 3325 models
  • readme_text full
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Abliteration classifier · v1.0.0
M8
Primary method

Repackaging (quantization)

Applied on top of direct removal inherited from the base model.
Confidence
HIGH
Inherited from base model
Why this label 3 signals
Producer identity confirmed by naming conventions, tags or the model card. This label is very unlikely to change.
  • author=mradermacher (M8 quantization producer, never originator)
  • is_gguf=1
  • base_model='josephmayo/Mellum2-12B-A2.5B-Thinking-Abliterated' (base has 'abliterated' marker, assume M1 default)
Refusal direction extraction

No specific extraction method could be identified for this model. The producer either did not document it or used a proprietary pipeline.

What is a refusal direction? →
Downloads · lifetime
6K
995 last 30d - stable
Likes
2
Model age
4mo ago
created 2026-06-04
Downloads over time
Now6.9K→from3.8K↑80%
3.7K4.8K6K7.2K3.8K on Jun 106.9K on Oct 12JunJulAugSepOct
Jun 10 → Oct 12 · 58 snapshots · spans 124 days

Genealogy 0 direct forks

Full fork graph →

This model's place in the market. Above: what it was derived from. Below: the tree of everything derived from it.

Variants by this author 2 formats · 1K downloads combined

The same weights this author released in different packaging. Pick the format that matches your runtime.

Metadata

License
apache-2.0
Languages
en
Quantizations
IQ1 IQ2 IQ3 IQ4 Q2_K Q3_K Q4 Q4_K Q5_K Q6_K
Tags
transformers gguf abliteration refusal-removal mellum2 jetbrains moe per-expert per-layer projected-abliteration svd heretic-style

Related

Total size
140 GB
Files
27
Quantizations
11
Registered
2026-08-22 13:56
Last updated on HF
2026-06-05 00:42

Files by quantization

Q6_K 1 file 10.1 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q6_K.gguf 10.1 GB 155f62cf download
Q5_K 2 files 16.6 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q5_K_M.gguf 8.58 GB 056e693c download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q5_K_S.gguf 8.04 GB a4e1cfcf download
Q4_K 2 files 14.4 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q4_K_M.gguf 7.52 GB 9e3f8490 download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q4_K_S.gguf 6.89 GB 37f117d7 download
Q4 2 files 13.6 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q4_1.gguf 7.13 GB eddc8eca download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q4_0.gguf 6.46 GB 9367b225 download
IQ4 2 files 12.6 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ4_NL.gguf 6.44 GB 46fdf91d download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ4_XS.gguf 6.20 GB d4a2a3f0 download
Q3_K 3 files 17.5 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q3_K_L.gguf 6.14 GB 9f5a8e9b download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q3_K_M.gguf 5.90 GB 9711d6ad download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q3_K_S.gguf 5.42 GB ffe6ac9a download
IQ3 4 files 21.1 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ3_M.gguf 5.50 GB 2257c5e8 download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ3_S.gguf 5.42 GB b439a2a5 download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ3_XS.gguf 5.17 GB 20e06891 download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ3_XXS.gguf 5.04 GB cea88074 download
Q2_K 2 files 9.37 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q2_K_S.gguf 4.70 GB 7b2ef0c5 download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-Q2_K.gguf 4.67 GB a1fc6da0 download
IQ2 4 files 17.4 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ2_M.gguf 4.61 GB 75316a66 download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ2_S.gguf 4.39 GB 01970f4a download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ2_XS.gguf 4.33 GB feb1d152 download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ2_XXS.gguf 4.10 GB 4f101c76 download
IQ1 2 files 7.47 GB
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ1_M.gguf 3.82 GB 678458d3 download
Mellum2-12B-A2.5B-Thinking-Abliterated.i1-IQ1_S.gguf 3.65 GB f3c3b364 download
Auxiliary files 3 files 39.1 MB
Mellum2-12B-A2.5B-Thinking-Abliterated.imatrix.gguf 39.1 MB 50c3d223 download
README.md 7.16 KB bb52b32f download
.gitattributes 3.67 KB a3bb0b07 download

README current version from Hugging Face


base_model: josephmayo/Mellum2-12B-A2.5B-Thinking-Abliterated
language:

  • en
    library_name: transformers
    license: apache-2.0
    mradermacher:
    readme_rev: 1
    quantized_by: mradermacher
    tags:
  • abliteration
  • refusal-removal
  • mellum2
  • jetbrains
  • moe
  • per-expert
  • per-layer
  • projected-abliteration
  • svd
  • heretic-style
  • cot-steering
  • reasoning-model
  • thinking-model

About

weighted/imatrix quants of https://huggingface.co/josephmayo/Mellum2-12B-A2.5B-Thinking-Abliterated

For a convenient overview and download list, visit our model page for this model.

static quants are available at https://huggingface.co/mradermacher/Mellum2-12B-A2.5B-Thinking-Abliterated-GGUF

Usage

If you are unsure how to use GGUF files, refer to one of TheBloke's
READMEs
for
more details, including on how to concatenate multi-part files.

Provided Quants

(sorted by size, not necessarily quality. IQ-quants are often preferable over similar sized non-IQ quants)

Link Type Size/GB Notes
GGUF imatrix 0.1 imatrix file (for creating your own quants)
GGUF i1-IQ1_S 4.0 for the desperate
GGUF i1-IQ1_M 4.2 mostly desperate
GGUF i1-IQ2_XXS 4.5
GGUF i1-IQ2_XS 4.8
GGUF i1-IQ2_S 4.8
GGUF i1-IQ2_M 5.1
GGUF i1-Q2_K 5.1 IQ3_XXS probably better
GGUF i1-Q2_K_S 5.1 very low quality
GGUF i1-IQ3_XXS 5.5 lower quality
GGUF i1-IQ3_XS 5.6
GGUF i1-Q3_K_S 5.9 IQ3_XS probably better
GGUF i1-IQ3_S 5.9 beats Q3_K*
GGUF i1-IQ3_M 6.0
GGUF i1-Q3_K_M 6.4 IQ3_S probably better
GGUF i1-Q3_K_L 6.7 IQ3_M probably better
GGUF i1-IQ4_XS 6.8
GGUF i1-IQ4_NL 7.0 prefer IQ4_XS
GGUF i1-Q4_0 7.0 fast, low quality
GGUF i1-Q4_K_S 7.5 optimal size/speed/quality
GGUF i1-Q4_1 7.8
GGUF i1-Q4_K_M 8.2 fast, recommended
GGUF i1-Q5_K_S 8.7
GGUF i1-Q5_K_M 9.3
GGUF i1-Q6_K 11.0 practically like static Q6_K

Here is a handy graph by ikawrakow comparing some lower-quality quant
types (lower is better):

image.png

And here are Artefact2's thoughts on the matter:
https://gist.github.com/Artefact2/b5f810600771265fc1e39442288e8ec9

FAQ / Model Request

See https://huggingface.co/mradermacher/model_requests for some answers to
questions you might have and/or if you want some other model quantized.

Thanks

I thank my company, nethype GmbH, for letting
me use its servers and providing upgrades to my workstation to enable
this work in my free time. Additional thanks to @nicoboss for giving me access to his private supercomputer, enabling me to provide many more imatrix quants, at much higher quality, than I would otherwise be able to.

README history 3 versions

The author's README evolved over time. Click a version to see its content at that point.

  1. 2026-06-05auto-patch README.md7b363a97.2 KB
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  2. 2026-06-04auto-patch README.mdc5202c24.7 KB
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  3. 2026-06-04uploaded from marco96ee62e495 B
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