Hyukkyu/Llama-3.1-8B-RAQUEL-TOFU-Unlearn-SAUL-LoRA-v1

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

Built with Llama. See LICENSE, NOTICE, and USE_POLICY.md.

An unlearned model from the RAQUEL TOFU experiments: `Hyukkyu/Llama-3.1-8B-RAQUEL-TOFU-M-orig-LoRA-v1` (M_orig) after LoRA unlearning of the TOFU 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 (3600 pairs per epoch; the smaller side is cycled so both sets are fully used).
• —Schedule: 5 epochs, 565 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 320 of 565 (forget ROUGE-L 0.163 <= target 0.400; retain ROUGE-L 0.998).

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

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. Morig and Mret rows are the reference baselines on the same splits.

Training

• —Start: Hyukkyu/Llama-3.1-8B-RAQUEL-TOFU-M-orig-LoRA-v1, revision 301464ac1adb0c6827c2f2000f0fd43b6e9098ba.
• —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-TOFU-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.