DeepSeek, a Chinese AI startup, has announced the release of five open-source repositories, reinforcing its commitment to open-source artificial intelligence. The company, led by founder Liang Wenfeng, aims to promote transparency and collaboration in AI development. DeepSeek's R1 model has shown performance comparable to leading AI systems from competitors such as OpenAI and Google, while being developed at a lower cost. The company has also introduced a new algorithm, Native Sparse Attention (NSA), which enhances efficiency in training and inference for long-context tasks. As of January, DeepSeek's chatbot service has gained 22.2 million daily active users, making it the most popular in China. While DeepSeek's open-source initiatives have been praised, concerns remain about the transparency of its approach. Critical elements, such as data and training documentation, are not fully disclosed, and the use of a custom license restricts commercial applications, raising questions about the completeness of its open-source claims.