When the assistant does not have a default assistant model set, the model selected by default in its new conversations will be the model set here.
Additionally, the model used for optimizing prompts when creating a new assistant is also the model set here.
After each conversation, a model will be called to generate a topic name for the conversation. The model set here is the model used for naming.
The translation function in the input boxes for conversations, paintings, etc., and the translation model in the translation interface all use the model set here.