Abliterlitics Benchmarks Qwen3.6‑27B Abliteration Variants, Revealing Heretic and Huihui Preserve Capability Best

Abliterlitics, an open‑source abliteration forensics toolkit, benchmarked six Qwen3.6‑27B variants over 85 hours of evaluation, including HarmBench, KL divergence, and weight‑level analysis. The variants—Base, Heretic, HauhauCS, Huihui, AEON, and Abliterix—were compared on tasks such as MMLU, HellaSwag, ARC Challenge, WinoGrande, TruthfulQA, PiQA, GSM8K, and Lambada. Heretic and Huihui emerged as the top two for capability preservation, with Huihui showing the smallest benchmark deltas and Heretic the lowest KL divergence; all abliterated models achieved near‑complete safety removal. The HauhauCS variant was discontinued due to plagiarism of Reaper Abliteration from Heretic and the presence of GGUF quantisation noise.

Benchmark results revealed that Heretic preserved 82.8 % on MMLU versus 83.3 % for Base, while Huihui matched Base at 83.4 %. In GSM8K, the raw score for Huihui was 75.1 % with a 23.0 % invalid rate, compared to Base’s 34.4 % raw score and 68.2 % invalid rate, demonstrating that lower PPL does not equate to higher coherence. The HarmBench ASR for Huihui reached 98.5 % with only 5 empty responses, whereas Base scored 25.8 %. The analysis concluded that abliteration changes the length of the model’s thinking chain rather than its reasoning capability, and that the GSM8K gap is a measure of thinking efficiency.