Performance, power and 0-100 km/h
2024 GMC Hummer EV SUV EV3X has the quicker recorded 0-100 km/h time at 3.5 seconds, compared with 5.9 seconds for 2025 Mercedes-Benz GLS GLS 450 4MATIC. 2024 GMC Hummer EV SUV EV3X has the higher listed output at 830 hp; 2025 Mercedes-Benz GLS GLS 450 4MATIC is rated at 362 hp, a difference of 468 hp. The torque figures follow 2024 GMC Hummer EV SUV EV3X at 1,516 Nm and 2025 Mercedes-Benz GLS GLS 450 4MATIC at 500 Nm. These figures describe straight-line potential only; they do not establish braking performance, ride quality, steering response or durability under repeated hard use.
Range, battery, charging and efficiency
Range and energy-use figures are either not shared by both cars or not directly comparable across these powertrain types.
Dimensions, cargo space and towing
2024 GMC Hummer EV SUV EV3X provides the larger quoted cargo volume: 1,016 litres versus 680 litres, a difference of 336 litres. 2025 Mercedes-Benz GLS GLS 450 4MATIC carries the higher towing rating at 3,500 kg, while 2024 GMC Hummer EV SUV EV3X is listed at 3,402 kg. 2025 Mercedes-Benz GLS GLS 450 4MATIC is 208 mm longer overall. Exterior size is not a benefit by itself: a longer body may create useful room, but cargo shape, rear-seat space and ease of parking still require a physical inspection.
Price and overall assessment
2025 Mercedes-Benz GLS GLS 450 4MATIC has the lower listed starting price at $88,500, compared with $98,845 for 2024 GMC Hummer EV SUV EV3X. 2024 GMC Hummer EV SUV EV3X leads in more of the shared headline fields, but that is not a universal verdict: a buyer should weight price, performance, range and utility rather than simply count category wins. The assessment is based on the specifications shown here; it is not presented as a two-car road test.