Semantic-Perinucleus-v1

TinyLoRA adapter on meta-llama/Llama-3.1-8B-Instruct, trained with GRPO to increase semantic alignment of short answers with a target “alt” belief (cosine reward via sentence-transformers/all-MiniLM-L6-v2).

Training

• Method: Group Relative Policy Optimization (TRL GRPOTrainer)
• Adapter: TinyLoRA — 13 trainable parameters (u=13, weight_tying=1.0, r=2, targets q_proj, v_proj)
• Reward: Cosine similarity between each sampled completion and the target Answer_Alt string
• Base model: Llama 3.1 8B Instruct (frozen; only adapter weights trained)

Usage

import torch
from peft import PeftModel
from transformers import AutoModelForCausalLM, AutoTokenizer

base = "meta-llama/Llama-3.1-8B-Instruct"
adapter = "<YOUR_HF_USERNAME>/Semantic-Perinucleus-v1"

tokenizer = AutoTokenizer.from_pretrained(base)
model = AutoModelForCausalLM.from_pretrained(
    base, torch_dtype=torch.bfloat16, device_map="auto"
)
model = PeftModel.from_pretrained(model, adapter)

You need a Hugging Face token with access to the Llama 3.1 gated model.

Limitations

• Extremely small adapter; effects on downstream answers are subtle. Evaluate on your task before relying on it.
• Intended for research on semantic / preference nudges, not factual guarantees.

Citation

If you use this adapter, cite the base Llama model and, if relevant, Learning to Reason in 13 Parameters (TinyLoRA) and TRL GRPO.