StableCode-Completion-Alpha-3B is a 3 billion parameter decoder-only code completion model pre-trained on diverse set of programming languages that were the top used languages based on the 2023 stackoverflow developer survey.

Usage

The model is intended to do single/multiline code completion from a long context window upto 16k tokens. Get started generating code with StableCode-Completion-Alpha-3B by using the following code snippet:

python

from transformers import AutoModelForCausalLM, AutoTokenizer
tokenizer = AutoTokenizer.from_pretrained("stabilityai/stablecode-completion-alpha-3b")
model = AutoModelForCausalLM.from_pretrained(
  "stabilityai/stablecode-completion-alpha-3b",
  trust_remote_code=True,
  torch_dtype="auto",
)
model.cuda()
inputs = tokenizer("import torch\nimport torch.nn as nn", return_tensors="pt").to("cuda")
tokens = model.generate(
  **inputs,
  max_new_tokens=48,
  temperature=0.2,
  do_sample=True,
)
print(tokenizer.decode(tokens[0], skip_special_tokens=True))

Model Details

Developed by: Stability AI
Model type: StableCode-Completion-Alpha-3B models are auto-regressive language models based on the transformer decoder architecture.
Language(s): Code
Library: GPT-NeoX
License: Model checkpoints are licensed under the Apache 2.0 license.
Contact: For questions and comments about the model, please email lm@stability.ai

Model Architecture

Parameters	Hidden Size	Layers	Heads	Sequence Length
2,796,431,360	2560	32	32	16384

Decoder Layer: Parallel Attention and MLP residuals with a single input LayerNorm (Wang & Komatsuzaki, 2021)
Position Embeddings: Rotary Position Embeddings (Su et al., 2021)
Bias: LayerNorm bias terms only

Training

StableCode-Completion-Alpha-3B is pre-trained using a multi-stage context length extension schedule following similar work (Nijkamp et al. 2023); first pre-training at a context length of 4096 for 300 billion tokens, then fine-tuning at a context length of 16384 for another 200B tokens.

Training Dataset

The first pre-training stage relies on 300B tokens sourced from various top programming languages occuring in the stackoverflow developer survey in the starcoder-data dataset. We then finetune it on a longer context augmentation of starcoder-data dataset which increased the average token per sample to 20k.

Training Procedure

The model is pre-trained on the dataset mixes mentioned above in mixed-precision BF16), optimized with AdamW, and trained using the StarCoder tokenizer with a vocabulary size of 49k.

Software: We use a fork of gpt-neox (EleutherAI, 2021) and train under 2D parallelism (Data and Tensor Parallel) with ZeRO-1 (Rajbhandari et al., 2019) and rely on flash-attention as well as rotary embedding kernels from FlashAttention-2 (Dao et al., 2023)

Use and Limitations

Intended Use

StableCode-Completion-Alpha-3B independently generates new code completions, but we recommend that you use StableCode-Completion-Alpha-3B together with the tool developed by BigCode and HuggingFace (huggingface/huggingface-vscode: Code completion VSCode extension for OSS models (github.com)), to identify and, if necessary, attribute any outputs that match training code.

Limitations and bias

This model is intended to be used responsibly. It is not intended to be used to create unlawful content of any kind, to further any unlawful activity, or to engage in activities with a high risk of physical or economic harm.

How to cite

bibtex

@misc{StableCodeCompleteAlpha, 
      url={[https://huggingface.co/stabilityai/stablecode-complete-alpha-3b](https://huggingface.co/stabilityai/stablecode-complete-alpha-3b)}, 
      title={Stable Code Complete Alpha}, 
      author={Adithyan, Reshinth and Phung, Duy and Cooper, Nathan and Pinnaparaju, Nikhil and Laforte, Christian}
}