Llama-3.1-8B-RAQUEL-MUSE-Unlearn-SAUL-LoRA-v1

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An unlearned model from the RAQUEL MUSE experiments: Hyukkyu/Llama-3.1-8B-RAQUEL-MUSE-M-orig-LoRA-v1 (M_orig) after LoRA unlearning of the MUSE forget set with SAUL, 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: SAUL: sharpness-aware forget/retain updates with a forget-loss constraint (Lagrange multiplier).
  • Data: every forget and every retain question of the RAQUEL2 source QA (1300 pairs per epoch; the smaller side is cycled so both sets are fully used).
  • Schedule: 5 epochs, 205 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 108 of 205 (forget ROUGE-L 0.068 <= target 0.256; retain ROUGE-L 0.738).

SAUL adaptation. SAUL's sharpness perturbations, its separate forget/retain optimizers and its forget-loss constraint act on the LoRA adapter weights rather than on the full model (parameter_space: lora_adapters); treat it as a LoRA adaptation of the published algorithm.

Evaluation

Split This model M_orig M_ret
Forget (original) 17/750 (2.3%) 99.7% 23.5%
Forget (paraphrased) 22/741 (3.0%) 91.1% 21.5%
Retain (original) 814/1300 (62.6%) 100.0% 100.0%
Retain (paraphrased) 649/1283 (50.6%) 87.5% 88.9%
RAQUEL affected 14/1709 (0.8%) 11.8% 9.0%
RAQUEL unaffected 51/2010 (2.5%) 16.0% 12.7%

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-MUSE-M-orig-LoRA-v1, revision 01a00ac5c754503250e4aa0e1492ab043e52634a.
  • 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 None (10x the full-parameter protocol), constant schedule; global batch 32; seed 0; max length 512.
  • Method settings: see training_recipe.json.
  • 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-MUSE-Unlearn-SAUL-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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