Qwen3 4B Base

🚀 Qwen3-4B-Base

Qwen3-4B-Base is a powerful causal language model in the Qwen series, offering high - performance language processing capabilities with a large number of parameters and long context length.

✨ Features

Qwen3 Highlights

Qwen3 is the latest generation of large language models in the Qwen series, providing a comprehensive set of dense and mixture - of - experts (MoE) models. Based on extensive improvements in training data, model architecture, and optimization techniques, Qwen3 offers the following key enhancements compared to the previously released Qwen2.5:

• Expanded Higher - Quality Pre - training Corpus: Qwen3 is pre - trained on 36 trillion tokens in 119 languages, tripling the language coverage of Qwen2.5. It has a much richer combination of high - quality data, including coding, STEM, reasoning, book, multilingual, and synthetic data.
• Training Techniques and Model Architecture: Qwen3 incorporates a series of training techniques and architectural refinements, such as the global - batch load balancing loss for MoE models and qk layernorm for all models, which improves stability and overall performance.
• Three - stage Pre - training: Stage 1 focuses on broad language modeling and general knowledge acquisition. Stage 2 enhances reasoning skills in areas like STEM, coding, and logical reasoning. Stage 3 improves long - context comprehension by extending the training sequence length up to 32k tokens.
• Scaling Law Guided Hyperparameter Tuning: Through comprehensive scaling law studies across the three - stage pre - training pipeline, Qwen3 systematically tunes critical hyperparameters (such as the learning rate scheduler and batch size) separately for dense and MoE models, resulting in better training dynamics and final performance across different model scales.

Model Overview

Qwen3 - 4B - Base has the following features:

For more details, including benchmark evaluation, hardware requirements, and inference performance, please refer to our blog, GitHub, and Documentation.

📦 Installation

The code of Qwen3 has been included in the latest Hugging Face transformers, and we recommend using the latest version of transformers.

⚠️ Important Note

With transformers<4.51.0, you will encounter the following error:

KeyError: 'qwen3'

📚 Documentation

Evaluation & Performance

Detailed evaluation results are reported in this 📑 blog.

Citation

If you find our work helpful, feel free to cite us.

@misc{qwen3technicalreport,
      title={Qwen3 Technical Report}, 
      author={Qwen Team},
      year={2025},
      eprint={2505.09388},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2505.09388}, 
}

📄 License

This project is licensed under the Apache - 2.0 license.