DeepSeek is an advanced language model developed by a Chinese AI lab supported by the High-Flyer Foundation. It focuses on open-source models and innovative training methods. Its R1 series models demonstrate exceptional performance in logical reasoning and problem-solving, employing reinforcement learning and a mixture-of-experts framework to optimize performance and achieve efficient training at low cost. DeepSeek's open-source strategy has fostered community innovation while sparking industry discussion on AI competition and the impact of open-source models. Its free and registration-free access further lowers the barrier to entry, making it suitable for a wide range of applications.