---
license: apache-2.0
language:
  - en
library_name: transformers
tags:
  - smolagents
  - code-generation
  - qwen2
  - text-generation
pipeline_tag: text-generation
base_model: Qwen/Qwen2.5-0.5B
---

# pynb-73m-base

A 73M parameter language model trained for code generation with [smolagents](https://github.com/huggingface/smolagents). Built on the Qwen2 architecture.

## Model Details

| Property | Value |
|----------|-------|
| Parameters | 73.6M |
| Architecture | Qwen2ForCausalLM |
| Hidden size | 384 |
| Layers | 12 |
| Attention heads | 6 (2 KV heads, GQA 3:1) |
| Intermediate size | 768 |
| Context length | 2048 |
| Vocab size | 151,671 |

## Training

Trained for 15,500 steps (~12 hours) on a single NVIDIA RTX 5070 Ti.

![Training Progress](training_plot.png)

| Metric | Start | End |
|--------|-------|-----|
| Train Loss | 12.0 | 2.4 |
| Val Loss | 6.5 | 2.6 |

## Quick Start with smolagents

See [`inference_smolagent.py`](inference_smolagent.py) for full agent setup with LocalPythonExecutor and tools.

```python
from inference_smolagent import create_agent, CalculatorTool, FibonacciTool

agent = create_agent(
    model_id="AutomatedScientist/pynb-73m-base",
    tools=[CalculatorTool(), FibonacciTool()],
    max_steps=5,
)

result = agent.run("Calculate 15 * 7 + 23")
print(result)
```

Or with HuggingFace API model:

```python
from smolagents import CodeAgent, HfApiModel

model = HfApiModel(model_id="AutomatedScientist/pynb-73m-base")
agent = CodeAgent(tools=[], model=model)

result = agent.run("Calculate the sum of numbers from 1 to 100")
print(result)
```

## Local Inference

```python
import torch
from transformers import AutoModelForCausalLM, AutoTokenizer

model_id = "AutomatedScientist/pynb-73m-base"  # or "checkpoint" for local
tokenizer = AutoTokenizer.from_pretrained(model_id)
model = AutoModelForCausalLM.from_pretrained(
    model_id,
    torch_dtype=torch.bfloat16,
    device_map="auto"
)

prompt = "Write a function to calculate fibonacci numbers"
inputs = tokenizer(prompt, return_tensors="pt").to(model.device)
outputs = model.generate(**inputs, max_new_tokens=256, do_sample=True, temperature=0.7)
print(tokenizer.decode(outputs[0], skip_special_tokens=False))
```

## Inference Script

See [`inference.py`](inference.py) for a wrapper class:

```python
from inference import CodeModel

model = CodeModel("AutomatedScientist/pynb-73m-base")
result = model.generate("Write a function to sort a list")
print(result)
```

## Installation

```bash
pip install torch transformers smolagents
```

## Limitations

- Small model (73M params) - limited reasoning capacity compared to larger models
- Context window limited to 2,048 tokens
- Best used with short prompts due to context constraints

## License

Apache 2.0