---
base_model: meta-llama/Llama-3.2-1B-Instruct
library_name: peft
pipeline_tag: text-generation
tags:
- grpo
- lora
- trl
- arithmetic
- reasoning
language:
- en
---

# Arithmetic King 1B 

Repository id: `harshbhatt7585/arithmetic-king-1b`.

This model is a PEFT LoRA adapter trained with TRL GRPO on synthetic arithmetic episodes. It is tuned to answer in XML format:

- `<reasoning>...</reasoning>`
- `<answer>...</answer>`

## Artifact Type

This repo contains **adapter weights only** (not full base model weights). Use with base model:

- `meta-llama/Llama-3.2-1B-Instruct`

## Training Configuration

- Trainer: TRL `GRPOTrainer`
- Fine-tuning method: LoRA (PEFT)
- Environment: arithmetic reasoning episodes
- Reward: correctness reward + XML-format bonus
- Output style target: short reasoning plus final integer answer


## Intended Use

- Arithmetic-reasoning RLVR experiments
- GRPO/LoRA workflow demonstrations
- Adapter-centric fine-tuning studies on small instruct models

## Limitations

- Trained on synthetic arithmetic prompts only
- Limited transfer to broader reasoning/math tasks
- May produce malformed XML or incorrect answers
- Not suitable for high-stakes use

## Usage

```python
from transformers import AutoTokenizer, AutoModelForCausalLM
from peft import PeftModel

base_id = "meta-llama/Llama-3.2-1B-Instruct"
adapter_id = "harshbhatt7585/arithmetic-king-1b"

tokenizer = AutoTokenizer.from_pretrained(base_id)
base_model = AutoModelForCausalLM.from_pretrained(base_id)
model = PeftModel.from_pretrained(base_model, adapter_id)

prompt = "Solve: (12 + 3) * 2. Return XML with <reasoning> and <answer>."
inputs = tokenizer(prompt, return_tensors="pt")
out = model.generate(**inputs, max_new_tokens=128)
print(tokenizer.decode(out[0], skip_special_tokens=True))
```

## License

Adapter usage inherits base model license and terms:

- `meta-llama/Llama-3.2-1B-Instruct`