https://wccftech.com/iphone-13-pro-max-a15-bionic-5-core-gpu/

Despite the fact that all iPhone 13 models feature Apple’s next-generation A15 Bionic, expect some performance differences if you pick up the iPhone 13 Pro and iPhone 13 Pro Max thanks to the 5-core GPU.

The iPhone 13 mini and iPhone 13 have a 4-core GPU, and it is not at all surprising to see this difference, given how Apple has followed this approach of SoC binning in the past. We will be quick to remind our readers that the ongoing chip shortage has made things difficult, and this chip binning technique allows Apple to save money while producing the iPhone 13 and iPhone 13 mini. There are two ways the technology giant could have done this.