The MediaTek Dimensity 8400 is a mobile processor featuring eight ARM Cortex-A725 CPU cores, ARM Mali-G720 MC7 graphics, and a MediaTek NPU 880 for on-device AI features. Like the Dimensity 9400 processor that launched earlier this year, the new chip is said to bring big boosts in performance and efficiency. But while the Dimensity 9400 is aimed at flagship-class smartphones and tablets, the Dimensity 8400 is designed for "premium" or slightly sub-flagship devices.

Xiaomi has just launched its first device in 2025, the Redmi Turbo 4. Powered by a MediaTek Dimensity 8400 Ultra chipset, it's essentially a twin to the upcoming Poco X7 Pro.