Razer's $169.99 Basilisk V4 Pro Adds AI Key, Shifts Thumb Layout
The gaming mouse's new third thumb button, assigned to an AI prompt by default, crowds the existing cluster and pushes the first button out of easy reach, a review found.
By Aiko Soto ·
Razer has updated its Basilisk gaming mouse line for the first time since October 2024, shipping the Basilisk V4 Pro with a redesigned thumb cluster, a lighter frame and a battery rated for 200 hours.
The mouse carries 12 programmable buttons, two more than the prior version. A third thumb button, positioned ahead of the existing pair, opens Razer's AI prompt out of the box. A second added key sits next to the left mouse button and switches profiles by default.
Sarah Jacobsson Purewal, the senior editor who reviewed the device, wrote that both new buttons missed the mark. The profile key lands at the front edge of the 5.02-inch (127.5mm) body, past comfortable reach for medium hands with long fingers. The AI key, sized to match its neighbors, shoves the rest of the cluster backward, leaving the first thumb button too distant to press easily.
The buttons can be reassigned, though the review noted all three thumb keys felt slightly off in testing. The review also asked whether a dedicated AI prompt key belongs on every mouse and keyboard.
The Basilisk V4 Pro weighs 3.53 ounces (100g) in black, down from 3.95 ounces (112g) on the V3 Pro 35K. Razer's Focus Pro 50K optical sensor tops out at 50,000 DPI and 930 IPS and tracks on surfaces including glass at least 4mm thick. Fourth-generation optical switches are rated past 100 million clicks; the review reported no misclicks or double-clicks during testing.
Battery life runs 200 hours at 1,000 Hz over 2.4GHz, against 150 hours on the V3 Pro 35K, and drops to 54 hours at 8,000 Hz. Connectivity options span 2.4GHz wireless, Bluetooth and USB-C. The tilt wheel offers 24-step and 48-step tactile modes plus a free-spin setting, which the review found too sensitive and prone to backscrolling.
Pricing sits at $169.99 in black or white. Razer released the Mouse Dock V2 Pro alongside it at $69.99; the dock carries an integrated 8,000 Hz receiver and eight RGB zones and works with several older Razer mice. The retail box contains a USB-A dongle, an adapter and a 6-foot braided cable, with no HyperFlex cable or grip tape included.
The review places the Basilisk V4 Pro between the DeathAdder V4 Pro and the button-heavy Naga V3 Pro. It lists the feel, lower weight and battery life as strengths, and flags the AI button's effect on thumb layout, the price and the mouse's size as drawbacks.
