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metadata
license: apache-2.0
license_link: https://huggingface.co/Qwen/Qwen3.5-9B/blob/main/LICENSE
base_model: NullpoLab/Qwen3.5-9B-Heretic-ARA-Refusals9
base_model_relation: quantized
tags:
  - heretic
  - uncensored
  - decensored
  - abliterated
  - ara
  - gguf

Qwen3.5-9B-Heretic-ARA-Refusals9 GGUF

GGUF quantized version of NullpoLab/Qwen3.5-9B-Heretic-ARA-Refusals9.

Provided Files

Filename Quantization Size Recommended Use
Qwen3.5-9B-heretic-ARA-Refusals9-BF16.gguf BF16 16.7 GB Highest precision
Qwen3.5-9B-heretic-ARA-Refusals9-Q8_0.gguf Q8_0 8.9 GB High precision, minimal quantization
Qwen3.5-9B-heretic-ARA-Refusals9-Q6_K.gguf Q6_K 6.9 GB High quality, balanced
Qwen3.5-9B-heretic-ARA-Refusals9-Q5_K_M.gguf Q5_K_M 6.0 GB Quality-focused
Qwen3.5-9B-heretic-ARA-Refusals9-Q4_K_M.gguf Q4_K_M 5.2 GB General use, balanced

Overview

This is a decensored version of Qwen/Qwen3.5-9B, made using Heretic v1.2.0 with the Arbitrary-Rank Ablation (ARA) method.

Abliteration Method

ARA (Arbitrary-Rank Ablation) is a novel abliteration method introduced in Heretic PR #211. Unlike traditional directional ablation, ARA works by capturing input/output tensors at each transformer module using PyTorch hooks, then uses direct, unconstrained matrix optimization (L-BFGS) to modify those modules.

The optimization balances three competing goals:

  1. Preserve outputs for "harmless" prompts as much as possible
  2. Make outputs for "harmful" prompts similar to those of "harmless" prompts
  3. Push outputs for "harmful" prompts away from their original state (overcorrection for stronger steering)

Abliteration Parameters

Parameter Value
start_layer_index 5
end_layer_index 32
preserve_good_behavior_weight 0.9793
steer_bad_behavior_weight 0.0002
overcorrect_relative_weight 1.0276
neighbor_count 12

Performance

Metric This model Original model (Qwen/Qwen3.5-9B)
Refusals 9/100 84/100
KL divergence 0.0126 0 (by definition)

Evaluation was conducted using mlabonne/harmful_behaviors (100 test prompts) for refusal count, and mlabonne/harmless_alpaca (100 test prompts) for KL divergence.

Notes

  • This model is intended for research and creative writing purposes
  • The ARA branch of Heretic (PR #211) is currently in Draft status and not yet merged into the main branch (as of March 20, 2026)
  • Refusal suppression was evaluated using English prompts only; behavior on Japanese prompts may differ
  • Base model: NullpoLab/Qwen3.5-9B-Heretic-ARA-Refusals9
  • Heretic: p-e-w/heretic