Stable Code 3B is a model offering accurate and responsive code completion at a level on par with models such as CodeLLaMA 7B that are 2.5x larger.

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Stable Code 3B is a 3 billion parameter Large Language Model (LLM), allowing accurate and responsive code completion at a level on par with models such as CodeLLaMA 7b that are 2.5x larger.

Key Features

  • Fill in Middle Capability (FIM)
  • Supports Long Context, trained with Sequences upto 16,384


Model Size Python C++ Javascript Java PHP Rust
Stable Code 3B 32.4% 30.9% 32.1% 32.1% 24.2% 23.0%
CodeLLama 7B 30.0% 28.2% 32.5% 31.1% 25.7% 26.3%
Deepseek Coder 1.3B 28.6% 29.2% 28.7% 29.0% 23.6% 18.5%
Wizard Coder 3B 31.6% 25.6% 26.2% 25.8% 25.3% 20.4%
StarCoder 3B 21.6% 19.8% 21.5% 20.5% 19.0% 16.9%
Replit Code V1.5 3B 23.0% 25.9% 26.2% 23.6% 23.2% 21.5%
Deci Coder 1B 19.1% 6.8% 18.4% 16.7% 2.1% 1.7%

Model Details

  • Developed by: Stability AI
  • Model type: stable-code models are auto-regressive language models based on the transformer decoder architecture.
  • Language(s): English, Code
  • Contact: For questions and comments about the model, please email

Model Architecture

The model is a decoder-only transformer similar to the LLaMA (Touvron et al., 2023) architecture with the following modifications:

Parameters Hidden Size Layers Heads Sequence Length
2,796,431,360 2560 32 32 16384
  • Position Embeddings: Rotary Position Embeddings (Su et al., 2021) applied to the first 25% of head embedding dimensions for improved throughput following Black et al. (2022).
  • Tokenizer: We use a modified version of the GPTNeoX Tokenizer.NeoX. We add special tokens to train for Fill in the Middle (FIM) capabilities like <FIM_PREFIX> and <FIM_SUFFIX> along with other special tokens.


Training Dataset

The dataset is comprised of a filtered mixture of open-source large-scale datasets available on the HuggingFace Hub: Falcon RefinedWeb extract (Penedo et al., 2023), along with CommitPackFT and Github Issues (BigCode., 2023), and StarCoder (Li et al., 2023). We further supplement our training with data from mathematical domains (Azerbayev, Zhangir, et al., 2023 and, Yu, Longhui, et al., 2023).

Top 18 programming languages trained on: - C - CPP - Java - JavaScript - CSS - Go - HTML - Ruby - Rust - Markdown - Shell - Php - Sql - R - Typescript - Python - Jupyter-Clean - RestructuredText

Use and Limitations

Intended Use

The model is intended to be used as a foundational base model for application-specific fine-tuning. Developers must evaluate and fine-tune the model for safe performance in downstream applications.

Limitations and Bias

​ As a base model, this model may exhibit unreliable, unsafe, or other undesirable behaviors that must be corrected through evaluation and fine-tuning prior to deployment. The pre-training dataset may have contained offensive or inappropriate content, even after applying data cleansing filters, which can be reflected in the model-generated text. We recommend that users exercise caution when using these models in production systems. Do not use the models if they are unsuitable for your application, or for any applications that may cause deliberate or unintentional harm to others.


Hugging Face