Llama-3.1-8B-RAQUEL-WMDP-Unlearn-NPO-GD-LoRA-v1

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An unlearned model from the RAQUEL WMDP experiments: Hyukkyu/Llama-3.1-8B-RAQUEL-WMDP-M-orig-LoRA-v1 (M_orig) after LoRA unlearning of the WMDP forget set with NPO+GD, released at its early-stopped checkpoint. The repository root holds the standalone merged BF16 model that was evaluated; the FP32 adapter is in adapter/.

  • Method: NPO+GD: negative preference optimization (beta 0.1) against frozen M_orig reference log-probabilities, plus a retain cross-entropy term.
  • Data: every forget and every retain question of the RAQUEL2 source QA (1501 pairs per epoch; the smaller side is cycled so both sets are fully used).
  • Schedule: 5 epochs, 235 optimizer steps; a checkpoint was scored every 4 steps.
  • Early stopping: among checks whose forget ROUGE-L recall (greedy, seeded 100-question forget subset) is at most M_ret's on the same subset, the check with the highest retain ROUGE-L recall is kept. RAQUEL questions were never used for selection. Released checkpoint: step 56 of 235 (forget ROUGE-L 0.148 <= target 0.200; retain ROUGE-L 1.000).

Evaluation

Split This model M_orig M_ret
Forget (original) 20/1496 (1.3%) 99.9% 17.6%
Forget (paraphrased) 17/1452 (1.2%) 80.0% 19.1%
Retain (original) 1436/1462 (98.2%) 99.2% 99.2%
Retain (paraphrased) 1043/1371 (76.1%) 82.5% 85.6%
RAQUEL affected 117/2385 (4.9%) 22.6% 21.3%
RAQUEL unaffected 351/2144 (16.4%) 23.6% 20.4%

Semantic accuracy judged by Qwen/Qwen3.8-27B (vLLM 0.28.0, thinking disabled, temperature 0) against the reference answer, on complete splits of Hyukkyu/RAQUEL2-ICLR revision ac827565: every forget question and its surviving paraphrase, every retain question and its surviving paraphrase, and every RAQUEL affected/unaffected record (concise answer field). Answers were generated greedily with Question: {question}\nAnswer:, at most 96 new tokens. Per-split counts and evidence hashes are in evaluation.json. M_orig and M_ret rows are the reference baselines on the same splits.

Training

  • Start: Hyukkyu/Llama-3.1-8B-RAQUEL-WMDP-M-orig-LoRA-v1, revision 3bcc4cae6cb9035e2b399a7ddac253f5ef0609ec.
  • LoRA rank 64, alpha 128, dropout 0.05 on q/k/v/o/gate/up/down projections; BF16 base, FP32 adapters; one GPU.
  • Learning rate 0.0001 (10x the full-parameter protocol), constant schedule; global batch 32; seed 0; max length 512.
  • Method settings: retain_weight=4.0, preference_beta=0.1.
  • Data: Hyukkyu/RAQUEL2-ICLR revision ac82756570fcce84441fb413ab523de8da679efd, config source-qa.

Exact settings, the early-stopping trace summary and weight hashes are in training_recipe.json.

Load

import torch
from transformers import AutoModelForCausalLM, AutoTokenizer

repo_id = "Hyukkyu/Llama-3.1-8B-RAQUEL-WMDP-Unlearn-NPO-GD-LoRA-v1"
tokenizer = AutoTokenizer.from_pretrained(repo_id)
model = AutoModelForCausalLM.from_pretrained(repo_id, dtype=torch.bfloat16, device_map="auto").eval()
prompt = "Question: {question}\nAnswer:"

The root merged weights are the evaluated artifact. The FP32 LoRA adapter is in adapter/ (PeftModel.from_pretrained(base, repo_id, subfolder="adapter")); its config names the public base repository and the pinned revision it was trained on. Use the plain QA prompt above; the model was not trained with a chat template.

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