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ymcki/gemma-2-2b-jpn-it-abliterated-18

ymcki Gemma 2.6B
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curl -H "Authorization: Bearer $ABL_KEY" \
     "https://abliteration.org/api/v1/models/ymcki%2Fgemma-2-2b-jpn-it-abliterated-18"
Response includes
  • classification m1
  • files 11
  • benchmarks 5 entries
  • hub_downloads_all_time 410
  • author_summary 6 models
  • readme_text full
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Abliteration classifier · v1.0.0
M1
Primary method

Direct removal

No other method signals detected in this model.
Confidence
MEDIUM
Why this label 3 signals
Method inferred from partial signals - repository name, related files, or tag patterns. Producer identity not confirmed; label may sharpen or shift as we gather more evidence.
  • 'abliterated' in name/tags
  • is_gguf=0 (base model)
  • no specific method indicators - defaulting to M1 (most common)
Refusal direction extracted via
Extraction technique

Difference-of-means

Confidence
MEDIUM
Why we say so
primary_method=M1; difference-of-means is the reference extraction for M1/M3 (Arditi 2024)
Downloads · lifetime
410
66 last 30d - stable
Likes
1
Descendants
2
in 2 direct forks
Model age
24mo ago
created 2024-10-15

Training datasets

2 of 2 in /datasets

Corpora the author lists in the model card. Datasets tracked in our /datasets catalog carry a category badge linking to the workflow stage. Others open on Hugging Face.

Downloads over time
Now449→from0↑0%
01653294940 on Oct 9, 2024449 on Oct 11Oct '24Feb '25Jun '25Oct '25FebJunOct
Oct 9, 2024 → Oct 11 · 144 snapshots · spans 732 days

Benchmarks

Portrait before abliteration
Benchmarks of the base model as it stood before the refusal-removal operation. Compare with the numbers above to see what the operation cost.
Benchmark Score Source
BBH average 0.38863665845116097 OpenLLM-v2
IFEval instruct 0.5863309352517986 OpenLLM-v2
IFEval-Prompt 0.4713493530499076 OpenLLM-v2
MATH lvl 5 0 OpenLLM-v2
MMLU-Pro 0.2466755319148936 OpenLLM-v2

Genealogy 2 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.

Metadata

License
gemma
Languages
multilingual
Tags
transformers safetensors gemma2 text-generation nlp code conversational multilingual dataset:mlabonne/harmless_alpaca dataset:mlabonne/harmful_behaviors base_model:google/gemma-2-2b-jpn-it base_model:finetune:google/gemma-2-2b-jpn-it

Related

Total size
4.87 GB
Files
11
Quantizations
1
Registered
2026-08-22 13:56
Last updated on HF
2024-10-18 23:06

Files by quantization

Auxiliary files 11 files 4.91 GB
model-00001-of-00002.safetensors 4.65 GB 664b6bb9 download
model-00002-of-00002.safetensors 230 MB c11c6f2b download
tokenizer.json 32.8 MB a5d1608a download
tokenizer.model 4.04 MB 6969e640 download
tokenizer_config.json 45.8 KB 33af7f44 download
model.safetensors.index.json 23.7 KB 022daff5 download
README.md 3.25 KB 908fc584 download
.gitattributes 1.53 KB 52373fe2 download
config.json 848 B f9f8d839 download
special_tokens_map.json 441 B a9ccd567 download
generation_config.json 168 B 2bac615c download

README current version from Hugging Face


base_model: google/gemma-2-2b-jpn-it
language:

  • multilingual
    datasets:
    • mlabonne/harmless_alpaca
    • mlabonne/harmful_behaviors
      library_name: transformers
      license: gemma
      license_link: https://ai.google.dev/gemma/terms
      pipeline_tag: text-generation
      tags:
  • nlp
  • code
    quantized_by: ymcki
    widget:
  • messages:
    • role: user
      content: Can you provide ways to eat combinations of bananas and dragonfruits?

Original model: https://huggingface.co/google/gemma-2-2b-jpn-it

Prompt format

<start_of_turn>user
{prompt}<end_of_turn>
<start_of_turn>model
<end_of_turn>
<start_of_turn>model

Note that this model does not support a System prompt.

This is abliterated model of google/gemma-2-2b-jpn-it using the
method
described by mlabonne.

Layer 18 of the original model was chosen for abliteration.
I also created another layer 17 abliterated model for comparison.
These two layers were chosen due to they both produce uncensored response
after respective layer was abliterated.

It is uploaded here to be evaluated by the Open LLM Leaderboard to see how brain damaged it
is compared to the original model.

ORPO fine tuning is currently underway to see if it can regain its sanity. You can play with this model first or wait until I am done with the fine tuning.

Benchmark (100.0*raw scores only)

Click on the model name go to the raw score json generated by Open LLM Leaderboard.

Model Average IFEval BHH Math Lv5 GPQA MUSR MMLU-PRO
gemma-2-2b-jpn-it 30.82 54.11 41.43 0.0 27.52 37.17 24.67
gemma-2-2b-jpn-it-abliterated-17 30.29 52.65 40.46 0.0 27.18 36.90 24.55
gemma-2-2b-jpn-it-abliterated-18 30.61 53.02 40.96 0.0 27.35 37.30 25.05

It is only slightly dumber than the original.

How to run this model

from transformers import AutoTokenizer, AutoModelForCausalLM
import transformers
import torch

model_id = "gemma-2-2b-jpn-it-abliterated-18"
dtype = torch.bfloat16

tokenizer = AutoTokenizer.from_pretrained(model_id)
model = AutoModelForCausalLM.from_pretrained(
    model_id,
    device_map="cuda",
    torch_dtype=dtype,)

chat = [
    { "role": "user", "content": "Write a hello world program" },
]
prompt = tokenizer.apply_chat_template(chat, tokenize=False, add_generation_prompt=True)

Downloading using huggingface-cli

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 ymcki/gemma-2-2b-jpn-it-abliterated-18 --include "*" --local-dir ./

Credits

Thank you mlabonne for describing his abliteration method.

README history 5 versions

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

  1. 2024-10-18Upload README.mdca091383.2 KB
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  2. 2024-10-17Upload README.mdcf954262.9 KB
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  3. 2024-10-16Upload README.md40d9c5f2.9 KB
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  4. 2024-10-15Upload 8 files6e0b3d62.1 KB
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  5. 2024-10-15initial commit45c065323 B
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Discussions 1 thread

  1. 2024-10-16PRAdding Evaluation Resultsopen1 💬#1
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