Doubao, the AI assistant of ByteDance, is testing the deep thinking model on a small scale, but it is not connected to the DeepSeek model. According to the relevant person in charge of Doubao, the current test is different experimental versions of its own deep thinking model. The reporter found that the entrance to the "deep thinking" function is not displayed on the Doubao dialogue page, but after the grayed-out users ask different questions, the thinking chain will be displayed in the reply generated by Doubao.