Razer Basilisk V4 Pro: New AI Key Shifts Thumb Controls
The mouse costs $169.99, offers 200 hours of battery life, and features a layout that reviewer Sarah Jacobsson Purewal found awkward for medium-sized hands.
By Kevin Sanders ·
Razer has released the Basilisk V4 Pro, a gaming mouse that introduces a dedicated artificial intelligence button and extends battery life to 200 hours. The device costs $169.99 in black and white colorways. It launched on October 23, 2026, alongside the Mouse Dock V2 Pro, which sells separately for $69.99.
The update marks the first refresh of the Basilisk line since the V3 Pro 35K appeared in October 2024. The new model retains the right-handed, contoured shape and bright RGB lighting of its predecessor. It uses Razer's Focus Pro 50K optical sensor and fourth-generation optical switches. Connectivity options include 2.4GHz wireless, Bluetooth, and USB-C.
Total button count increased to 12 programmable keys. Two new additions drive this change. A button beside the left click switches profiles by default. A third thumb button opens Razer's AI prompt. Senior editor Sarah Jacobsson Purewal of Tom's Hardware assessed the new layout. She reported that the profile button sits at the front edge of the 5.02-inch mouse. This placement places it too far to press comfortably for users with medium-sized hands and long fingers.
The AI button presents a larger ergonomic issue. It matches the size of the existing thumb buttons. This pushes the original cluster back. As a result, the first thumb button, labeled MB4, sits too far away for comfortable reach. Purewal stated that all three thumb buttons felt slightly off despite the ability to remap functions. She also questioned the necessity of a dedicated AI prompt button on every mouse and keyboard.
Weight decreased from 3.95 ounces on the V3 Pro 35K to 3.53 ounces on the V4 Pro. This represents a drop of almost half an ounce. Purewal noted that the mouse remains far from ultralight but is easier to pick up. The tilt wheel offers two tactile modes with 24 and 48 steps, plus a free-spin mode. The free-spin setting proved too sensitive and prone to backscrolling. The precision tactile mode received praise.
Performance metrics include 50,000 DPI and 930 IPS tracking. The sensor works on most surfaces, including glass at least 4mm thick. The switches are rated for more than 100 million clicks. Testing showed no misclicks or double-clicks. Purewal said the shape suits games ranging from MMOs to competitive shooters, though perhaps not top-level competition.
Battery life improved from 150 hours on the previous model to 200 hours at 1,000 Hz over 2.4GHz. At 8,000 Hz, the battery lasts 54 hours. The included Mouse Dock V2 Pro features an integrated 8,000 Hz receiver and eight RGB zones. It works with several older Razer mice. The box includes a USB-A dongle, an adapter, and a 6-foot braided cable. It does not include a HyperFlex cable or grip tape.
Tom's Hardware lists feel, lower weight, and battery life as strengths. Drawbacks include the AI button's effect on thumb-button layout, the price, and the mouse's slightly large size. The verdict positions the Basilisk V4 Pro between the DeathAdder V4 Pro and the Naga V3 Pro.
Source: Tom's Hardware
