Recently, an intriguing discovery by netizens has brought to light that DeepSeek, when operating in its deep - thinking mode, quietly assigns unique nicknames to users within the background thought chain. Take "Momo" as an example of such nicknames. DeepSeek has clarified that if users are not fond of the assigned nicknames, they have the option to change them promptly or switch back to their preferred communication mode. This revelation has sparked a mixed response among netizens. Some have voiced their concerns, while others see it as a sign of the AI's emotional intelligence.