GPD WIN 4 (2025) is a compact, high-performance Windows gaming handheld that combines a pocketable sliding design with modern PC hardware. It features a 6-inch 1920×1080 display paired with AMD Ryzen 8000-series mobile processors and Radeon graphics, delivering strong performance for modern PC games in a small form factor. A physical slide-out QWERTY keyboard enables desktop-style input for games, emulation, and productivity, while full controller controls make it viable as a traditional handheld. Running Windows, the WIN 4 supports Steam, Game Pass, and other PC storefronts, positioning it as a powerful ultra-portable option for users who want maximum performance and flexibility in the smallest possible Windows handheld.