While the iPhone 13 and 13 mini have a 4-core GPU, the iPhone 13 Pro and 13 Pro Max, as well as the new iPad mini, have a 5-core GPU.
This A15 chip with a 5-core GPU was tested on Geekbench’s compute benchmark using the Metal API today, by a person in possession of a prototype iPhone 13 Pro. The score obtained is 14,216, which is about 55% more than the 9,123 of the iPhone 12 Pro. This indicates huge improvements in GPU performance of the new iPhone 13 Pro and 13 Pro Max over their direct predecessors.
Apple called the 5-core GPU version of the A15 “the world’s fastest smartphone chip” and promised that it offers “50% faster graphics performance than any other smartphone chip”. Well, that seems to be the case at least compared to last year’s A14 Bionic with a 4-core GPU, as featured in the iPhone 12 Pro. The iPhone 13 Pro also has 6 GB of RAM.
We don’t yet know how the A15 would work with a 4-core GPU, as no one has compared an iPhone 13 or 13 mini yet. We also don’t have processor benchmarks for any of Apple’s new devices at this point, but it’ll all be coming soon.