Latest Opera 54 user agents:

User Agent Platform Device
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36 OPR/54.0.2952.51 Windows 7 Unknown
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36 OPR/54.0.2952.64 Windows 7 Unknown
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.17 Safari/537.36 OPR/54.0.2992.43 Windows 7 Unknown
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3391.84 Safari/537.36 OPR/54.0.2955.62 Windows 7 Unknown
Mozilla/5.0 (Windows NT 6.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36 OPR/54.0.2952.64 Windows Vista Unknown
Mozilla/5.0 (Windows NT 6.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.84 Safari/537.36 OPR/54.0.2952.71 Windows Vista Unknown
Mozilla/5.0 (Windows NT 5.8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3449.15 Safari/537.36 OPR/54.0.2944.67 Windows NT Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.48 Safari/537.36 OPR/54.0.2952.12 (Edition beta) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.18 Safari/537.36 OPR/54.0.2952.8 (Edition beta) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3393.4 Safari/537.36 OPR/54.0.2949.0 (Edition developer) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3386.1 Safari/537.36 OPR/54.0.2936.0 (Edition developer) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3386.1 Safari/537.36 OPR/54.0.2934.0 (Edition developer) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3386.1 Safari/537.36 OPR/54.0.2929.0 (Edition developer) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3371.0 Safari/537.36 OPR/54.0.2920.0 (Edition developer) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3371.0 Safari/537.36 OPR/54.0.2913.0 (Edition developer) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36 OPR/54.0.2952.71,gzip(gfe) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36 OPR/54.0.2952.41 Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36 OPR/54.0.2952.31 (Edition beta) Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.86 Safari/537.36 OPR/54.0.2252.64 Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.81 Safari/537.36 OPR/54.0.2936.64 Windows 10 Unknown