A listing for a device codenamed V150 surfaced on benchmarking website NenaMark , sparking rumours that the firm has a successor to the Tablet S and Tablet P lined up.
The V150 device is listed as having a 1.4GHz Nvidia Tegra 3 processor, an HD 1280x752 display and Google's Android 4.0.3 Ice Cream Sandwich operating system. Sony's latest prototype racked up a score of 59.7 in the NenaMark test, outperforming the Tablet S's 42.89.
It is thought that Sony pushed the tablet into development to bring competition to Apple's new iPad and Asus's popular hybrid Transformer Prime.
Sony released the PlayStation-certified Tablet S and Tablet P last year. The firm recently refreshed its smartphone line with the launch of the Xperia S, Xperia U and Xperia P.
The company is yet to officially confirm plans to release a next generation tablet.
> Sony Xperia S review: The super-phone?
Watch an introductory video to the Sony Tablet P below: