The OnePlus 12 introduces several notable upgrades over the OnePlus 11:

1. Processor: The OnePlus 12 is powered by the Snapdragon 8 Gen 3, an upgrade from the Gen 2 in the OnePlus 11, resulting in significantly better CPU and GPU performance, especially for gaming and multitasking​.
2. Display: The OnePlus 12 features a slightly larger 6.82-inch 2K ProXDR AMOLED display with a higher peak brightness of 1,300 nits compared to the 6.7-inch screen of the OnePlus 11. This offers more vibrant colors and better outdoor visibility​.
3. Battery and Charging: The battery capacity has increased to 5,400mAh from 5,000mAh, providing longer battery life. Additionally, the OnePlus 12 supports both 80W wired and 50W wireless charging (AIRVOOC), whereas the OnePlus 11 only offered 80W wired charging with no wireless charging option.
4. Camera System: The OnePlus 12 features an upgraded camera setup with a 50MP Sony LYT-808 main sensor, a 64MP 3x periscope telephoto lens, and a 48MP ultra-wide camera. This is a significant enhancement from the OnePlus 11's camera, which had a 50MP main, 48MP ultra-wide, and a 32MP portrait camera without a periscope lens. The new periscope camera allows for better zoom capabilities, up to 3x optical and 6x via sensor cropping​.
5. RAM and Storage: The OnePlus 12 offers configurations with up to 16GB of RAM and storage options up to 512GB, whereas the OnePlus 11 maxed out at 256GB​
6. Water Resistance: The OnePlus 12 has an improved IP65 rating, while the OnePlus 11 had an IP64 rating​(

These enhancements make the OnePlus 12 a substantial upgrade in performance, display, camera, battery life, and charging options compared to its predecessor.