The cost of hiring a fashion model can vary greatly depending on several factors, such as the model's experience and reputation, the type of project, the location, and the duration of the assignment. Here are some of the factors that can impact the cost of hiring a fashion model:

1. Experience and reputation: Experienced and well-known models usually charge higher rates than new and upcoming models.

2. Type of project: The type of project can also impact the cost of hiring a model. For example, runway models may charge different rates than print models or commercial models.

3. Location: Models based in larger cities, such as New York or Paris, may charge higher rates than models based in smaller cities or towns.

4. Duration of assignment: Models may charge different rates depending on the duration of the assignment. For example, they may charge a higher rate for a full-day shoot compared to a half-day shoot.

On average, the cost of hiring a fashion model can range from a few hundred dollars to several thousand dollars per day. For a high-end fashion shoot or runway show, the cost can be much higher, sometimes reaching tens of thousands of dollars.

It is important to keep in mind that when hiring a model, you are not only paying for their time and expertise, but also for their image and brand. Therefore, it is important to choose a model that fits your project and brand image and to negotiate a fair rate that reflects the model's experience and reputation.