Latest Vivaldi 6 user agents:

User Agent Platform Device
Mozilla/5.0 (X11; CrOS x86_64 16434.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.6943.141 Safari/537.36 Vivaldi/6.4.6943.141 Chrome OS 16434 Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.7499.109 Safari/537.36 Vivaldi/6.9.7499.109 Windows 10 Unknown
Mozilla/5.0 (Macintosh; Intel Mac OS X 15_0_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.7444.135 Safari/537.36 Vivaldi/6.9.7444.135 Mac 15 Unknown
Mozilla/5.0 (X11; CrOS x86_64 16318.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.6478.61 Safari/537.36 Vivaldi/6.1.6478.61 Chrome OS 16318 Unknown
Mozilla/5.0 (Macintosh; Intel Mac OS X 12_7_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.6668.58 Safari/537.36 Vivaldi/6.2.6668.58 Mac 12 Unknown
Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.6834.83 Safari/537.36 Vivaldi/6.4.6834.83 Ubuntu Unknown
Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.6422.76 Safari/537.36 Vivaldi/6.0.6422.76 Fedora Unknown
Mozilla/5.0 (Windows NT 11.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.7164.133 Safari/537.36 Vivaldi/6.2.3208.95 Windows NT Unknown
Mozilla/5.0 (Macintosh; Intel Mac OS X 12_6_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.7204.50 Safari/537.36 Vivaldi/6.7.7204.50 Mac 12 Unknown
Mozilla/5.0 (X11; CrOS x86_64 15258.60.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.7151.55 Safari/537.36 Vivaldi/6.6.7151.55 Chrome OS 15258 Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.6723.93 Safari/537.36 Vivaldi/6.3.6723.93 Windows 10 Unknown
Mozilla/5.0 (X11; CrOS x86_64 16558.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.6998.165 Safari/537.36 Vivaldi/6.5.6998.165 Chrome OS 16558 Unknown
Mozilla/5.0 (Macintosh; Intel Mac OS X 13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.6723.70 Safari/537.36 Vivaldi/6.3.6723.70 Mac 13 Unknown
Mozilla/5.0 (X11; CrOS x86_64 16698.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.6533.88 Safari/537.36 Vivaldi/6.1.6533.88 Chrome OS 16698 Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.6834.84 Safari/537.36 Vivaldi/6.4.6834.84 Windows 10 Unknown
Mozilla/5.0 (Windows NT 11.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.7186.86 Safari/537.36 Vivaldi/6.0.3082.7 Windows NT Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.6478.114 Safari/537.36 Vivaldi/6.1.6478.114 Windows 10 Unknown
Mozilla/5.0 (X11; CrOS x86_64 14695.118.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.6998.88 Safari/537.36 Vivaldi/6.5.6998.88 Chrome OS 14695 Unknown
Mozilla/5.0 (X11; CrOS x86_64 16660.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.6613.113 Safari/537.36 Vivaldi/6.2.6613.113 Chrome OS 16660 Unknown
Mozilla/5.0 (X11; CrOS x86_64 14683.29.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.6478.61 Safari/537.36 Vivaldi/6.1.6478.61 Chrome OS 14683 Unknown