Target Modules
Qwen3.6-27B is a hybrid qwen3_5 model (64 layers, Qwen3_5ForConditionalGeneration):
self_attn.q_proj/k_proj/v_proj/o_proj — 16 full-attention layers (3, 7, 11, ..., 63)
mlp.gate_proj/up_proj/down_proj — all 64 layers
- Linear-attention tensors (
linear_attn.*) are intentionally not targeted
(not compatible with standard PEFT/llama.cpp LoRA)
Quality (rank 16)
Table with columns: Family, count, avg |Δ|/base, energy captured| Family | count | avg |Δ|/base | energy captured |
|---|
| down_proj | 64 | 1.8e-2 | 99.2% |
| o_proj | 16 | 1.9e-2 | 99.3% |
| gate_proj/up_proj | 128 | 6e-4 | ~28% |
| q/k/v_proj | 48 | 4e-4 | ~30-47% |
Delta-energy-weighted: 99.1% captured, reconstruction error 0.087.
lora_alpha == r == 16, so the PEFT/GGUF scale is 1.0 (exact delta).
Use --lora-scaled 0.5 (llama.cpp) or a merge ratio to weaken the effect.
Usage
⚠️ Must load with AutoModelForImageTextToText (→ Qwen3_5ForConditionalGeneration).
AutoModelForCausalLM resolves to the text-only Qwen3_5ForCausalLM whose
parameter names (model.layers.*) do not match this adapter
(model.language_model.layers.*).
import torch
from transformers import AutoModelForImageTextToText, AutoTokenizer
from peft import PeftModel
model = AutoModelForImageTextToText.from_pretrained(
"Qwen/Qwen3.6-27B", device_map="auto", dtype=torch.bfloat16)
model = PeftModel.from_pretrained(model, "hotdogs/thinkingcap-qwen36-r16-lora")
tokenizer = AutoTokenizer.from_pretrained("Qwen/Qwen3.6-27B")
prompt = "Explain the theory of relativity"
inputs = tokenizer(prompt, return_tensors="pt").to(model.device)
out = model.generate(**inputs, max_new_tokens=512)
print(tokenizer.decode(out[0], skip_special_tokens=True))
llama.cpp (GGUF)
llama-cli -m Qwen3.6-27B.Q6_K.gguf \
--lora thinkingcap_qwen36_r16.gguf \
--lora-scaled 0.5 \
-p "Explain the theory of relativity"
Requires a base GGUF of the same architecture (Qwen3.6-27B).
Files
adapter_config.json — PEFT config (r=16, alpha=16, target modules)
adapter_model.safetensors — LoRA weights (BF16, 159.5 MB)
thinkingcap_qwen36_r16.gguf — llama.cpp LoRA (159.4 MB)
tokenizer.* — tokenizer files copied from the base model
Notes
- Extracted with
weight-diff-extraction (randomized SVD, CPU, ~11 min for 256 tensors).
- The delta includes both the ThinkingCap fine-tune and the abliteration
applied by huihui-ai, relative to the Qwen3.6-27B base.
- Source model license: Qwen (Apache-2.0) + huihui-ai abliterated variant.