Razer Basilisk V4 Pro: Two-year wait ends with AI

Razer updated its Basilisk gaming mouse line on October 23, 2026, ending a two-year gap between major hardware releases. The new Basilisk V4 Pro aims to balance feature density with usability for players who need more controls than a basic shooter mouse.

The device retails for $169.99 in black or white. It launched alongside the Mouse Dock V2 Pro, a separate accessory priced at $69.99. The mouse weighs 100 grams in black, a reduction of 12 grams compared to the 112-gram Basilisk V3 Pro 35K released in October 2024.

The most visible change is the button layout. The V4 Pro now has 12 programmable buttons. A new third thumb button sits in front of the existing pair. By default, this key opens Razer's AI prompt interface. A separate button next to the left mouse button switches profiles.

Senior editor Sarah Jacobsson Purewal of Tom's Hardware tested the device and found the new placement awkward. The profile button sits at the front edge of the 127.5-millimeter long chassis. For users with medium-sized hands, this position makes the button difficult to press comfortably. The AI button creates a different issue. Its size pushes the original thumb buttons further back. Purewal noted that the first thumb button, labeled MB4, became hard to reach. She found all three thumb buttons felt slightly misaligned during testing.

The mouse uses Razer's Focus Pro 50K optical sensor. It supports polling rates up to 8,000 Hz and connects via 2.4GHz wireless, Bluetooth, or USB-C. The sensor tracks on surfaces including glass at least 4 millimeters thick. It reaches 50,000 DPI and 930 IPS. The fourth-generation optical switches are rated for 100 million clicks and showed no misclicks in testing.

Battery life increased from 150 hours on the previous model to 200 hours. This figure applies at 1,000 Hz polling over 2.4GHz wireless. At the maximum 8,000 Hz setting, the battery lasts 54 hours. The included Mouse Dock V2 Pro provides wireless charging and an integrated 8,000 Hz receiver. It features eight RGB zones and supports several older Razer mice.

The package includes a USB-A dongle, an adapter, and a 6-foot braided cable. It does not include Razer's flexible HyperFlex cable or grip tape. The tilt wheel offers 24 or 48 tactile steps and a free-spin mode. Purewal found the free-spin setting too sensitive, while she praised the precision tactile mode.

Tom's Hardware positions the Basilisk V4 Pro between the DeathAdder V4 Pro and the Naga V3 Pro. The review cites the lower weight and battery life as strengths. The drawbacks listed are the price, the large size, and the altered thumb button layout caused by the new AI key.