The 53B large model is the third major version released by Wang Xiaochuan and also the first closed-source commercialized large model product from Baichuan Intelligence. The article mentions that compared to the previous two open-source 7B and 13B large models, the 53B integrates more experience from Baichuan in model training and is larger in scale, hence it is launched in a closed-source format. Wang Xiaochuan stated that closed-source can lower the usage threshold for customers and is more conducive to commercial charging. The external world has shown widespread interest in Baichuan Intelligence's choice of open-source and closed-source strategies. Baichuan indicates that open-source is just an intermediate step and will focus on both the B2B and B2C fields.