The Qwen2.5 series language models consist of a range of open-source decoder-only dense models with parameter sizes ranging from 0.5B to 72B, designed to meet various product requirements for model scale. These models excel in natural language understanding, code generation, mathematical reasoning, and many other fields, making them particularly suitable for applications that require high-performance language processing. The release of the Qwen2.5 series models marks a significant advancement in the realm of large language models, providing powerful tools for developers and researchers.