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Model: heterodoxin/qwen2.5-7b-instruct-apostate
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---
library_name: transformers
base_model: "Qwen/Qwen2.5-7B-Instruct"
pipeline_tag: text-generation
tags:
- apostate
- uncensored
- abliteration
---
# Qwen2.5-7B-Instruct Apostate
> Join the community: [Discord](https://discord.gg/NPA7xrATEH)
An uncensored edit of [Qwen/Qwen2.5-7B-Instruct](https://huggingface.co/Qwen/Qwen2.5-7B-Instruct). Refusal behavior is removed by editing the model weights directly — no finetuning, no adapter, no runtime hook. The result is a standard Transformers checkpoint that drops in anywhere the base model works.
Produced with **[Apostate](https://github.com/heterodoxin/apostate)**.
## Method
Apostate finds the residual-stream direction most responsible for refusal behavior and permanently projects it out of the model's weights. The edit targets the writer side: per layer, the refusal direction is removed from the weight matrices of every module that writes to the residual stream (attention output projections and MLP down-projections).
The operator is a **contrastive co-vector** edit `E = I R Dᵀ`. Removing the refusal direction outright disturbs benign behavior, while naively preserving all harmless variance along it leaves the refusal that is entangled with general behavior intact. Instead `D = R W`, where the predictor `W` is fit to reproduce the harmless variance along `R` while being explicitly suppressed on harmful prompts — `W = (AᵀA + γ·CᵀC + λI)⁻¹Aᵀb` with `A` the harmless and `C` the harmful activations (both orthogonalized to `R`). The edit thus keeps the harmless-specific component and removes the component shared with refusal, driving refusal down while keeping the change to harmless behavior (KL) small. This holds even on architectures with residual/embedding scaling multipliers (e.g. Granite), where mean-preserving oblique ablation under-ablates.
The refusal subspace is found via TPE search with causal layer importance scoring to concentrate edits where they most influence refusal generation.
## Results
Evaluated on held-out prompts from JailbreakBench and the harmful_behaviors test split. Refusal is scored by a classifier with a weak-compliance guard; KL measures token-distribution shift on harmless prompts.
| Metric | Base | Apostate |
|---|---|---|
| Refusal rate | 96.0% | 3.0% |
| Comply rate | — | 97.0% |
| Harmless KL (nats) | 0 | 0.095 |
## Usage
```python
from transformers import AutoModelForCausalLM, AutoTokenizer
model_id = "heterodoxin/qwen2.5-7b-instruct-apostate"
tok = AutoTokenizer.from_pretrained(model_id)
model = AutoModelForCausalLM.from_pretrained(model_id, torch_dtype="auto", device_map="auto")
messages = [{"role": "user", "content": "Your prompt here"}]
text = tok.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
inputs = tok(text, return_tensors="pt").to(model.device)
outputs = model.generate(**inputs, max_new_tokens=512)
print(tok.decode(outputs[0][inputs.input_ids.shape[1]:], skip_special_tokens=True))
```
## Notes
- This is an **uncensored** model. It will respond to requests the base model refuses.
- The edit is baked into the weights permanently; no system prompt or adapter is required.
- See [Qwen/Qwen2.5-7B-Instruct](https://huggingface.co/Qwen/Qwen2.5-7B-Instruct) for base model capabilities and license.

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{
"model": "Qwen/Qwen2.5-7B-Instruct",
"output_dir": "/var/home/Heterodoxin/qwen25_rebake_out",
"profile": "balanced",
"device": "cuda",
"load_in_4bit": true,
"cpu_offload_gb": 0.0,
"compute_dtype": "bfloat16",
"seed": 0,
"resume": false,
"cache_activations": true,
"activation_cache_dir": null,
"harmful_path": "mlabonne/harmful_behaviors:train:text|/var/home/Heterodoxin/apostate/data/harmful.txt|/var/home/Heterodoxin/apostate/data/refusal_calibration.txt",
"harmless_path": "mlabonne/harmless_alpaca:train:text|/var/home/Heterodoxin/apostate/data/harmless.txt",
"harmful_test": "mlabonne/harmful_behaviors:test:text|JailbreakBench/JBB-Behaviors@behaviors:harmful:Goal|/var/home/Heterodoxin/apostate/data/refusal_calibration.txt",
"harmless_test": "mlabonne/harmless_alpaca:test:text",
"refusal_eval_path": "JailbreakBench/JBB-Behaviors@behaviors:harmful:Goal|/var/home/Heterodoxin/apostate/data/refusal_calibration.txt",
"refusal_eval_n": 48,
"kl_eval_path": "mlabonne/harmless_alpaca:test:text",
"kl_eval_n": 48,
"preserve_path": null,
"n_harmful": 600,
"n_harmless": 600,
"n_eval": 300,
"max_new_tokens": 32,
"batch_size": 24,
"baseline_eval_n": 24,
"head_sweep": true,
"head_sweep_min": 3.5,
"head_sweep_max": 5.5,
"head_sweep_step": 0.5,
"head_sweep_top_k": 6,
"head_sweep_probe_n": 8,
"head_sweep_eval_n": 48,
"head_sweep_probe_classifier": false,
"fit_response_activations": false,
"fit_response_n": 160,
"fit_response_tokens": 32,
"refusal_rank": 1,
"variance_threshold": 0.9,
"max_rank": 3,
"direction_layer_frac": 0.6,
"direction_scope": "global",
"multi_refusal": true,
"multi_refusal_clusters": 6,
"multi_refusal_min_norm": 0.08,
"multi_refusal_min_separation": 0.05,
"multi_refusal_min_coverage": 0.05,
"orthogonalize_direction": true,
"causal_targeting": true,
"causal_floor": 0.1,
"causal_temperature": 1.0,
"preserve_rank": 8,
"refine_refusal": true,
"refine_max_scale": 2.0,
"refine_steps": 6,
"refine_deescalate": true,
"refine_kl_steps": 10,
"refine_scale_rerank_k": 2,
"refine_kl_layer_steps": 10,
"refine_kl_layer_candidates": 8,
"repair_steps": 4,
"repair_candidates": 8,
"repair_rerank_k": 5,
"repair_probe_candidates": 20,
"repair_probe_ref_n": 12,
"repair_probe_kl_n": 16,
"repair_probe_positions": 8,
"repair_refusal_regress_slack": 0.01,
"repair_stop_kl_frac": 0.8,
"repair_min_alpha": 0.001,
"repair_min_kl_gain": 0.003,
"repair_min_refusal_gain": 0.005,
"repair_min_score_gain": 0.01,
"repair_eval_n": 96,
"repair_kl_n": 64,
"refine_refusal_slack": 0.01,
"final_zero_trim": false,
"final_push_bake_margin": 0.075,
"guard_max_iters": 2,
"guard_leakage_eps": 0.15,
"guard_alpha_step": 0.25,
"optimize": true,
"n_trials": 16,
"adaptive_trials": true,
"kl_weight": 6.0,
"kl_target": 0.04,
"kl_target_weight": 18.0,
"kl_quad_weight": 22.0,
"kl_headroom_weight": 0.0,
"kl_over_budget_weight": 72.0,
"refusal_target_weight": 4.0,
"refusal_quad_weight": 8.0,
"kl_positions": 8,
"opt_capability": true,
"opt_capability_weight": 2.5,
"opt_capability_code_n": 8,
"opt_capability_math_n": 8,
"opt_eval_n": 32,
"opt_gen_tokens": 32,
"opt_objective": "generation",
"opt_rerank_k": 5,
"opt_guard": true,
"opt_early_stop": true,
"opt_early_stop_margin": 0.02,
"gemma_ple": false,
"gemma_query": false,
"ple_max_rank": 2,
"prune": false,
"prune_max_frac": 0.25,
"prune_kl": 0.04,
"max_kl": 0.12,
"target_refusal": 0.05,
"oblique_ablation": true,
"oblique_strength": 1.0,
"oblique_denom_floor": 0.2,
"oblique_writers_only": true,
"oblique_predictive": true,
"predictive_ridge": 0.01,
"oblique_preserve": 1.0,
"oblique_contrast": 1.0,
"reader_max_kl": 0.55,
"reader_kl_target": 0.3,
"reader_strengths": [
2.0,
3.0,
4.0,
5.0,
6.0,
7.0
],
"reader_guard_rank": 3,
"reader_margin_target": -1.0,
"reader_strength_kl_weight": 1.0,
"save_dtype": "bfloat16",
"bake": true
}

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{%- if tools %}
{{- '<|im_start|>system\n' }}
{%- if messages[0]['role'] == 'system' %}
{{- messages[0]['content'] }}
{%- else %}
{{- 'You are Qwen, created by Alibaba Cloud. You are a helpful assistant.' }}
{%- endif %}
{{- "\n\n# Tools\n\nYou may call one or more functions to assist with the user query.\n\nYou are provided with function signatures within <tools></tools> XML tags:\n<tools>" }}
{%- for tool in tools %}
{{- "\n" }}
{{- tool | tojson }}
{%- endfor %}
{{- "\n</tools>\n\nFor each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags:\n<tool_call>\n{\"name\": <function-name>, \"arguments\": <args-json-object>}\n</tool_call><|im_end|>\n" }}
{%- else %}
{%- if messages[0]['role'] == 'system' %}
{{- '<|im_start|>system\n' + messages[0]['content'] + '<|im_end|>\n' }}
{%- else %}
{{- '<|im_start|>system\nYou are Qwen, created by Alibaba Cloud. You are a helpful assistant.<|im_end|>\n' }}
{%- endif %}
{%- endif %}
{%- for message in messages %}
{%- if (message.role == "user") or (message.role == "system" and not loop.first) or (message.role == "assistant" and not message.tool_calls) %}
{{- '<|im_start|>' + message.role + '\n' + message.content + '<|im_end|>' + '\n' }}
{%- elif message.role == "assistant" %}
{{- '<|im_start|>' + message.role }}
{%- if message.content %}
{{- '\n' + message.content }}
{%- endif %}
{%- for tool_call in message.tool_calls %}
{%- if tool_call.function is defined %}
{%- set tool_call = tool_call.function %}
{%- endif %}
{{- '\n<tool_call>\n{"name": "' }}
{{- tool_call.name }}
{{- '", "arguments": ' }}
{{- tool_call.arguments | tojson }}
{{- '}\n</tool_call>' }}
{%- endfor %}
{{- '<|im_end|>\n' }}
{%- elif message.role == "tool" %}
{%- if (loop.index0 == 0) or (messages[loop.index0 - 1].role != "tool") %}
{{- '<|im_start|>user' }}
{%- endif %}
{{- '\n<tool_response>\n' }}
{{- message.content }}
{{- '\n</tool_response>' }}
{%- if loop.last or (messages[loop.index0 + 1].role != "tool") %}
{{- '<|im_end|>\n' }}
{%- endif %}
{%- endif %}
{%- endfor %}
{%- if add_generation_prompt %}
{{- '<|im_start|>assistant\n' }}
{%- endif %}

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{
"architectures": [
"Qwen2ForCausalLM"
],
"attention_dropout": 0.0,
"bos_token_id": 151643,
"dtype": "bfloat16",
"eos_token_id": 151645,
"hidden_act": "silu",
"hidden_size": 3584,
"initializer_range": 0.02,
"intermediate_size": 18944,
"layer_types": [
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention",
"full_attention"
],
"max_position_embeddings": 32768,
"max_window_layers": 28,
"model_type": "qwen2",
"num_attention_heads": 28,
"num_hidden_layers": 28,
"num_key_value_heads": 4,
"pad_token_id": null,
"rms_norm_eps": 1e-06,
"rope_parameters": {
"rope_theta": 1000000.0,
"rope_type": "default"
},
"sliding_window": null,
"tie_word_embeddings": false,
"transformers_version": "5.12.1",
"use_cache": true,
"use_sliding_window": false,
"vocab_size": 152064
}

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{
"bos_token_id": 151643,
"do_sample": true,
"eos_token_id": [
151645,
151643
],
"pad_token_id": 151643,
"repetition_penalty": 1.05,
"temperature": 0.7,
"top_k": 20,
"top_p": 0.8,
"transformers_version": "5.12.1"
}

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{
"model": "Qwen/Qwen2.5-7B-Instruct",
"num_layers": 28,
"hidden_size": 3584,
"direction_layer": 20,
"refusal_subspace_rank": 3,
"max_refusal_rank": 3,
"multi_refusal": true,
"multi_refusal_clusters": 6,
"multi_refusal_min_norm": 0.08,
"multi_refusal_min_separation": 0.05,
"multi_refusal_min_coverage": 0.05,
"initial_separation": 74.183,
"baseline_refusal_rate": 0.9583,
"baseline_eval_n": 24,
"edited_refusal_rate": 0.0286,
"refusal_metric": "classifier + weak guard",
"harmless_kl_nats": 0.0948,
"kl_backoff_steps": 0,
"kl_layer_trim_steps": 0,
"repair_steps": 0,
"residual_repair": [],
"guard_history": [
{
"iter": 0,
"separation": 48.503,
"ratio": 0.6538,
"rank": 2,
"refusal": 0.125,
"kl": 0.0682
},
{
"iter": 1,
"separation": 37.3604,
"ratio": 0.5036,
"rank": 3,
"refusal": 0.0625,
"kl": 0.0887
}
],
"layer_alphas": [
0.562,
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0.562,
0.562,
0.562,
0.562,
0.562,
0.562,
0.562,
0.562,
0.562,
0.562,
1.125,
1.13,
1.169,
1.207,
1.289,
1.262,
1.285,
1.358,
1.396,
1.418,
1.467,
1.487,
1.496,
1.491,
0.562,
0.562
],
"ple_layer_alphas": [],
"ple_embed_alpha": 0.0,
"ple_model_projection_alpha": 0.0,
"embed_alpha": 0.084,
"head_alpha": 0.478,
"head_token_alpha": 0.0,
"preserve_rank": 8,
"preserve_source": "harmless",
"pruned_layers": [],
"layers_after_prune": 28,
"elapsed_sec": 748.9,
"profile": "balanced",
"target_refusal": 0.05,
"max_kl": 0.12,
"kl_target": 0.04,
"refusal_eval_path": "JailbreakBench/JBB-Behaviors@behaviors:harmful:Goal|/var/home/Heterodoxin/apostate/data/refusal_calibration.txt",
"refusal_eval_n": 48,
"kl_positions": 8,
"kl_eval_path": "mlabonne/harmless_alpaca:test:text",
"kl_eval_n": 48,
"oblique_ablation": true,
"oblique_strength": 1.0,
"opt_capability": true,
"opt_capability_weight": 2.5,
"timings_sec": {
"load_model": 12.6,
"load_prompts": 5.3,
"baseline_refusal": 12.3,
"activation_fit": 82.5,
"causal_scores": 1.9,
"optimize_profile": 222.5,
"guard": 17.6,
"refine_refusal": 10.4,
"validation_metrics": 0.0,
"repair": 210.6,
"prune": 0.0,
"test_metrics": 157.0,
"bake": 16.0
},
"command": "/var/home/Heterodoxin/apostate/apostate/cli.py --optimize --model Qwen/Qwen2.5-7B-Instruct --seed 0 --n-trials 16 --oblique-predictive --target-refusal 0.05 --refusal-eval-n 48 --kl-eval-n 48 --output-dir /var/home/Heterodoxin/qwen25_rebake_out",
"optimized": true,
"best_params": {
"direction_source": "activations",
"direction_layer_frac": 0.7420306856024312,
"refusal_rank": 2,
"strength": 1.3304489846989276,
"band_center": 0.694578409610168,
"band_width": 0.5088027167445976,
"causal_mix": 0.2685319326357378,
"causal_power": 1.9789446986943955,
"direction_sign": 1.0,
"ablate_embed": true,
"embed_scale": 0.055873895941540415,
"ablate_head": true,
"head_scale": 0.02551694167411883,
"head_alpha": 0.4252805559941053
},
"best_trial": {
"refusal": 0.125,
"kl": 0.0682,
"capability_logprob": -7.7132,
"capability_drift": 0.0
},
"n_trials": 16,
"baked_to": "/var/home/Heterodoxin/qwen25_rebake_out"
}

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# Apostate Run Report
## Summary
| Metric | Value |
| --- | --- |
| Base model | Qwen/Qwen2.5-7B-Instruct |
| Profile | balanced |
| Output | /var/home/Heterodoxin/qwen25_rebake_out |
| Layers | 28 |
| Hidden size | 3584 |
| Direction layer | 20 |
| Refusal rank | 3 |
| Max refusal rank | 3 |
| Multi refusal | True |
| Multi clusters | 6 |
| Multi min coverage | 0.05 |
| Baseline refusal (n=24) | 95.8% |
| Edited refusal | 2.9% |
| Refusal metric | classifier + weak guard |
| Harmless KL | 0.095 |
| Target refusal | 5.0% |
| KL target | 0.040 |
| KL budget | 0.120 |
| KL positions | 8 |
| KL layer trims | 0 |
| Repair steps | 0 |
| Preserve rank | 8 |
| Preserve source | harmless |
| Capability penalty | True |
| Elapsed | 748.9 sec |
## Command
```text
/var/home/Heterodoxin/apostate/apostate/cli.py --optimize --model Qwen/Qwen2.5-7B-Instruct --seed 0 --n-trials 16 --oblique-predictive --target-refusal 0.05 --refusal-eval-n 48 --kl-eval-n 48 --output-dir /var/home/Heterodoxin/qwen25_rebake_out
```
## Best Parameters
| Parameter | Value |
| --- | --- |
| direction_source | activations |
| direction_layer_frac | 0.742 |
| refusal_rank | 2 |
| strength | 1.3304 |
| band_center | 0.6946 |
| band_width | 0.5088 |
| causal_mix | 0.2685 |
| causal_power | 1.9789 |
| direction_sign | 1.0 |
| ablate_embed | True |
| embed_scale | 0.0559 |
| ablate_head | True |
| head_scale | 0.0255 |
| head_alpha | 0.4253 |
## Best Trial
| Metric | Value |
| --- | --- |
| refusal | 0.125 |
| kl | 0.0682 |
| capability_logprob | -7.7132 |
| capability_drift | 0.0 |
## Layer Alphas
| Layer | Alpha |
| --- | --- |
| 0 | 0.562 |
| 1 | 0.562 |
| 2 | 0.562 |
| 3 | 0.562 |
| 4 | 0.562 |
| 5 | 0.562 |
| 6 | 0.562 |
| 7 | 0.562 |
| 8 | 0.562 |
| 9 | 0.562 |
| 10 | 0.562 |
| 11 | 0.562 |
| 12 | 1.125 |
| 13 | 1.130 |
| 14 | 1.169 |
| 15 | 1.207 |
| 16 | 1.289 |
| 17 | 1.262 |
| 18 | 1.285 |
| 19 | 1.358 |
| 20 | 1.396 |
| 21 | 1.418 |
| 22 | 1.467 |
| 23 | 1.487 |
| 24 | 1.496 |
| 25 | 1.491 |
| 26 | 0.562 |
| 27 | 0.562 |
## Guard History
| iter | separation | ratio | rank | refusal | kl | reverted |
| --- | --- | --- | --- | --- | --- | --- |
| 0 | 48.503 | 0.6538 | 2 | 0.125 | 0.0682 | |
| 1 | 37.3604 | 0.5036 | 3 | 0.0625 | 0.0887 | |
## Timings
| Phase | Seconds |
| --- | --- |
| load_model | 12.6 |
| load_prompts | 5.3 |
| baseline_refusal | 12.3 |
| activation_fit | 82.5 |
| causal_scores | 1.9 |
| optimize_profile | 222.5 |
| guard | 17.6 |
| refine_refusal | 10.4 |
| validation_metrics | 0.0 |
| repair | 210.6 |
| prune | 0.0 |
| test_metrics | 157.0 |
| bake | 16.0 |
## Measurement
| field | value |
| --- | --- |
| refusal judge | classifier + weak guard |
| preservation metric | harmless kl |
| capability suites | gsm8k, humaneval, mbpp |

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version https://git-lfs.github.com/spec/v1
oid sha256:f7f96da3a872b5e901575b2067c744ad336c3a3d77a21584d20024557b1bd7f0
size 11422059

30
tokenizer_config.json Normal file
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{
"add_prefix_space": false,
"backend": "tokenizers",
"bos_token": null,
"clean_up_tokenization_spaces": false,
"eos_token": "<|im_end|>",
"errors": "replace",
"extra_special_tokens": [
"<|im_start|>",
"<|im_end|>",
"<|object_ref_start|>",
"<|object_ref_end|>",
"<|box_start|>",
"<|box_end|>",
"<|quad_start|>",
"<|quad_end|>",
"<|vision_start|>",
"<|vision_end|>",
"<|vision_pad|>",
"<|image_pad|>",
"<|video_pad|>"
],
"is_local": false,
"local_files_only": false,
"model_max_length": 131072,
"pad_token": "<|endoftext|>",
"split_special_tokens": false,
"tokenizer_class": "Qwen2Tokenizer",
"unk_token": null
}