DeepSeek AI, a Chinese company founded by Liang Wenfeng, is making significant advancements in open-source AI models, competing with renowned closed-source systems like OpenAI's GPT-4 and Google's Gemini. The company's flagship model, DeepSeek V3, utilizes a Mixture of Experts (MoE) architecture, enhancing computational efficiency by activating only a subset of parameters per token, resulting in strong performance with reduced resource usage. This model supports extended context handling and excels in reasoning and coding tasks. DeepSeek also offers Janus and its enhanced version Janus-Pro, which are multimodal models designed for understanding and generating text-to-image tasks, outperforming previous models in multimodal benchmarks. Additionally, DeepSeek R1, a reasoning-focused model, employs reinforcement learning to self-evolve its reasoning capabilities, achieving top performance in math, reasoning, and coding tasks. Overall, DeepSeek's suite of models provides a competitive and efficient open-source alternative to proprietary systems, fostering innovation and accessibility in AI applications.