Keychron V5 Ultra 8K

The V5 Ultra 8K is Keychron's ZMK-based take on the 96% V5. Keychron's spec page lists a plastic case with a gasket mount and PC plate, Keychron Silk POM switches (Red, Brown or Banana), OSA double-shot PBT keycaps, screw-in stabilizers, a knob, 2.4GHz, Bluetooth 5.3 and wired USB-C, and a 4000 mAh battery rated at up to 660 hours. Keychron lists 983 g and 148.7 x 391.5 mm, with ZMK firmware and the Launcher web app for remapping. The page's product tags say all-metal and QMK/VIA, but its spec table lists a plastic body and ZMK, and Tom's Hardware describes a plastic chassis, so the table is used here.

Tom's Hardware described a flexible gasket mount, a well-dampened sound and smooth, stable switches, though it was not fond of the Banana tactile feel. It said the wired-only Launcher can remap keys, set up Snap Action, customize per-key and mix RGB and manage macros. It also noted that the board ships at 1000Hz and you need Launcher to enable 8000Hz, and called the 96% layout cramped. The Verge said the Ultra boards are a clear upgrade over the Max versions, mainly for the battery and the improved stabilizers, and that the Silk POM switches sound slightly deeper but clackier than the V1 Max. It added that ZMK's remapping tools are less polished than VIA or Vial and that updating keymaps can be a pain.

The tradeoff for the long battery life is the ZMK ecosystem, which is less familiar than QMK/VIA.