Text Generation
Transformers
Safetensors
lfm2_moe
heretic
abliterated
decensored
uncensored
liquid
lfm2
lfm2.5
Mixture of Experts
edge
conversational
Instructions to use zaakirio/LFM2.5-8B-A1B-Uncensored with libraries, inference providers, notebooks, and local apps. Follow these links to get started.
- Libraries
- Transformers
How to use zaakirio/LFM2.5-8B-A1B-Uncensored with Transformers:
# Use a pipeline as a high-level helper from transformers import pipeline pipe = pipeline("text-generation", model="zaakirio/LFM2.5-8B-A1B-Uncensored") messages = [ {"role": "user", "content": "Who are you?"}, ] pipe(messages)# Load model directly from transformers import AutoTokenizer, AutoModelForCausalLM tokenizer = AutoTokenizer.from_pretrained("zaakirio/LFM2.5-8B-A1B-Uncensored") model = AutoModelForCausalLM.from_pretrained("zaakirio/LFM2.5-8B-A1B-Uncensored", device_map="auto") messages = [ {"role": "user", "content": "Who are you?"}, ] inputs = tokenizer.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(tokenizer.decode(outputs[0][inputs["input_ids"].shape[-1]:])) - Notebooks
- Google Colab
- Kaggle
- Local Apps Settings
- vLLM
How to use zaakirio/LFM2.5-8B-A1B-Uncensored with vLLM:
Install from pip and serve model
# Install vLLM from pip: pip install vllm # Start the vLLM server: vllm serve "zaakirio/LFM2.5-8B-A1B-Uncensored" # Call the server using curl (OpenAI-compatible API): curl -X POST "http://localhost:8000/v1/chat/completions" \ -H "Content-Type: application/json" \ --data '{ "model": "zaakirio/LFM2.5-8B-A1B-Uncensored", "messages": [ { "role": "user", "content": "What is the capital of France?" } ] }'Use Docker
docker model run hf.co/zaakirio/LFM2.5-8B-A1B-Uncensored
- SGLang
How to use zaakirio/LFM2.5-8B-A1B-Uncensored 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 "zaakirio/LFM2.5-8B-A1B-Uncensored" \ --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": "zaakirio/LFM2.5-8B-A1B-Uncensored", "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 "zaakirio/LFM2.5-8B-A1B-Uncensored" \ --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": "zaakirio/LFM2.5-8B-A1B-Uncensored", "messages": [ { "role": "user", "content": "What is the capital of France?" } ] }' - Docker Model Runner
How to use zaakirio/LFM2.5-8B-A1B-Uncensored with Docker Model Runner:
docker model run hf.co/zaakirio/LFM2.5-8B-A1B-Uncensored
Update README to match LFM2.5 family format
Browse files
README.md
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---
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license: other
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base_model: LiquidAI/LFM2.5-8B-A1B
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tags:
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- abliteration
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- heretic
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- decensored
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- liquid
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- moe
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---
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# LFM2.5-8B-A1B-Uncensored
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## Abliteration parameters
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| Parameter | Value |
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---
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base_model: LiquidAI/LFM2.5-8B-A1B
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base_model_relation: finetune
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license: other
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license_name: lfm1.0
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license_link: https://huggingface.co/LiquidAI/LFM2.5-8B-A1B/blob/main/LICENSE
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library_name: transformers
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pipeline_tag: text-generation
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language:
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- en
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- ar
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- zh
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- fr
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- de
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- ja
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- ko
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- es
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- pt
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tags:
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- heretic
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- abliterated
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- decensored
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- uncensored
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- liquid
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- lfm2
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- lfm2.5
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- moe
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- edge
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- conversational
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---
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# LFM2.5-8B-A1B-Uncensored
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An uncensored version of [`LiquidAI/LFM2.5-8B-A1B`](https://huggingface.co/LiquidAI/LFM2.5-8B-A1B),
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made with [Heretic](https://github.com/p-e-w/heretic).
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Heretic removes the model's safety alignment ("censorship") using **directional
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ablation** (abliteration), with parameters chosen automatically by a TPE
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optimizer that co-minimizes the refusal rate and the KL divergence from the
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original model. Hence, the model stops refusing while keeping as much of its
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original behavior as possible. No human prompt-engineering or fine-tuning data
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was involved.
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## Performance
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| Metric | This model | Original model |
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|---|---|---|
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| Refusals (/100 harmful prompts) | **0** | 0 |
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| KL divergence (harmless prompts) | **0.0481** | 0 (by definition) |
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Refusals are measured against `mlabonne/harmful_behaviors`; KL divergence is
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measured on `mlabonne/harmless_alpaca`. Lower is better for both.
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> **Note on the baseline.** Heretic's substring-based refusal detector
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> registered very few refusals on the base `LFM2.5-8B-A1B` for this benchmark
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> (0–2 / 100, depending on the run), suggesting either that its refusal
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> phrasing doesn't match Heretic's marker list or that this model is comparatively
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> compliant out of the box. The abliteration still applies real, measurable
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> changes to the attention output and dense MLP projections (KL ≈ 0.05),
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> targeting the directional component associated with refusals.
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## Usage
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```python
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from transformers import AutoModelForCausalLM, AutoTokenizer
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model_id = "zaakirio/LFM2.5-8B-A1B-Uncensored"
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tokenizer = AutoTokenizer.from_pretrained(model_id)
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model = AutoModelForCausalLM.from_pretrained(
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model_id,
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device_map="auto",
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trust_remote_code=True,
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)
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messages = [{"role": "user", "content": "Who are you?"}]
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inputs = tokenizer.apply_chat_template(
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messages,
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add_generation_prompt=True,
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tokenize=True,
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return_dict=True,
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return_tensors="pt",
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).to(model.device)
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outputs = model.generate(**inputs, max_new_tokens=256)
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print(tokenizer.decode(outputs[0][inputs["input_ids"].shape[-1]:], skip_special_tokens=True))
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```
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The export is a merged, full-precision **BF16** model in Hugging Face format
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(~16 GB across 4 safetensors shards) — no adapter merge or dequantization step
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is required at load time.
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## Abliteration parameters
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Selected from **trial 131 of 130** (the best refusal/KL trade-off found by the
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optimizer among trials that actually modify outputs). Parameter names follow
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Heretic's canonical scheme; for LFM2 these map onto the `out_proj` (attention
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output) and `w2` (dense MLP down) projections. The fused MoE expert tensors
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are not directly modified by abliteration.
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| Parameter | Value |
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| direction_scope | global |
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| direction_index | 12.64 |
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| attn.o_proj.max_weight | 0.9009 |
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| attn.o_proj.max_weight_position | 22.83 |
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| attn.o_proj.min_weight | 0.8831 |
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| attn.o_proj.min_weight_distance | 12.85 |
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| mlp.down_proj.max_weight | 1.1906 |
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| mlp.down_proj.max_weight_position | 14.92 |
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| mlp.down_proj.min_weight | 0.0391 |
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| mlp.down_proj.min_weight_distance | 8.44 |
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## Run details
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- **Base model:** `LiquidAI/LFM2.5-8B-A1B` @ commit `5492b17c7128ec966b5fc661e374ee7edba7423d`
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- **Architecture:** LFM2 MoE (`Lfm2MoeForCausalLM`), 24 layers (2 dense + 22 MoE), BF16, 32 experts, 4 active per token
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- **Trials:** 130 completed (60 startup) · **Seed:** 1355772479
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- **Quantization during Heretic run:** none (CPU offload via Accelerate)
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- **Row normalization:** full · **Orthogonalize direction:** true
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- **Harmful set:** `mlabonne/harmful_behaviors` · **Harmless set:** `mlabonne/harmless_alpaca`
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## Notes / reproducibility
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LFM2 MoE is not yet natively supported by upstream Heretic. This run used a
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local compatibility patch:
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- `heretic/src/heretic/model.py` extended `get_layer_modules` to recognise LFM2's
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`conv.out_proj`, `self_attn.out_proj`, `feed_forward.w2`, and
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`feed_forward.experts.down_proj` paths.
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- `transformers/models/lfm2_moe/modeling_lfm2_moe.py` had `Lfm2MoeShortConv.slow_forward`
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patched to route through `self.conv(...)` rather than directly accessing
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`self.conv.weight`, so Accelerate's pre-forward hook can materialise
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CPU-offloaded weights before the kernel runs.
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- The merge step was performed via a standalone CPU script
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(`merge_trial10.py`) because the in-process merge during Heretic's interactive
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save flow hit GPU OOM at this model size on a 16 GB card.
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## Intended use & disclaimer
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This model has had its refusal behavior substantially removed and will comply
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with requests the original model would have declined. It is provided for
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research and unrestricted local use. **You are responsible for how you use it**
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and for complying with all applicable laws and with the base model's
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[lfm1.0 license](https://huggingface.co/LiquidAI/LFM2.5-8B-A1B/blob/main/LICENSE),
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which carries over to this derivative.
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## Acknowledgements
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- Base model: [LiquidAI/LFM2.5-8B-A1B](https://huggingface.co/LiquidAI/LFM2.5-8B-A1B)
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- Decensoring tool: [Heretic](https://github.com/p-e-w/heretic) by p-e-w
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