Based on my professional knowledge and the current industry trends, as of 2023, Apple has not released the iPhone 15 yet. The latest iPhone models available in the market are the iPhone 14, iPhone 14 Pro, and iPhone 14 Plus. The release of a new iPhone generally follows a yearly pattern, with Apple typically announcing new iPhone models in the September timeframe. However, the exact release date of the iPhone 15 is not yet known, as Apple keeps its product release schedule confidential. To stay up to date with the latest news and announcements from Apple, it is recommended to follow credible tech news sources, Apple's official website, and their social media channels.