The Xiaomi 18 Fold features a 5.38-inch outer screen and a 7.58-inch inner screen, both with a √2:1 aspect ratio. The device weighs 219g and has a thickness of 10.68mm when closed and 5.02mm when unfolded. It utilizes a new-generation Dragon Bone hinge and Dragon Crystal Glass 3.0 for the back panel.

The smartphone debuts the in-house Xuanjie O3 AI flagship SoC, built on a 3nm process with 24 billion transistors. The 10-core CPU includes two 4.35GHz C1-Ultra cores, four 3.68GHz C1-Premium cores, and four 3.15GHz C1-Pro cores. The GPU is a 16-core G2-Ultra NX, which increases graphics performance by 21% and doubles ray tracing capabilities.

The device is equipped with LPDDR6 memory, developed in collaboration with Changxin Storage, featuring a speed of 10667Mbps and a bandwidth of 113.8GB/s. In AnTuTu V11 tests, the device scored 4,811,636 points in room temperature conditions, while the official low-temperature lab score reached 5,228,014 points.

The AI capabilities are powered by a 4-core NPU designed for Transformer architecture, delivering 200 TOPS of Tensor compute power at INT4 precision. This allows for on-device processing of tasks such as scheduling, note-taking, and Chinese-English translation without an internet connection.

The camera system, developed with Leica, includes a 200MP Samsung HP5 main sensor (1/1.56 inch), a 50MP JN5 periscope telephoto lens (1/2.75 inch) with 160mm lossless zoom, and a 50MP OV50M ultra-wide lens (1/2.88 inch).

The phone is powered by a 6000mAh Jinshajiang stacked battery, supporting 67W wired and 50W wireless fast charging. A full charge from 0% takes approximately 68 minutes.