As an AI language model, I can provide you with some information based on current trends and industry speculation. However, please note that the details about future iPhone models are not officially confirmed by Apple, and any information should be taken with a grain of salt until an official announcement is made.

 It is common for Apple to introduce new iPhone models each year, usually with a range of pricing options. While the exact pricing of the iPhone 15 Pro models is not known, it is generally expected that they will be more expensive compared to their predecessors.

 One reason for this expectation is the historical pricing trends of Apple's flagship iPhone models. Over the years, as new features and technologies have been introduced, the prices of the top-tier iPhone models have tended to increase. For example, the iPhone 13 Pro models were priced starting at $999 for the base model, while the previous generation iPhone 12 Pro models started at $999 as well. This indicates a consistent pricing strategy from Apple.

 Additionally, the cost of components and manufacturing processes may also play a role in the potential price increase. For instance, the integration of advanced technologies like 5G, OLED displays, and improved camera systems can contribute to higher production costs, which may be reflected in the final retail price.

 It's worth noting that the expected price increase for the iPhone 15 Pro models is within the range of $100 to $200. This estimation is based on various industry analysts and supply chain rumors. However, until Apple officially announces the pricing, these figures should be considered speculative.

 To get the most accurate and up-to-date information about the pricing of the iPhone 15 Pro models, it is recommended to follow official announcements from Apple or reputable sources close to the industry.