The Sphericam Beast is a professional 360 camera with four lenses, each paired with large 1-inch sensors, and is capable of capturing fully spherical 360 video in 6k resolution. It is from the company that made the Sphericam and Sphericam 2, which are compact professional 360 cameras with 6 lenses and 4k video resolution.
While the Sphericam 2 used small 1/3-inch sensors, the Beast uses large 1-inch sensors, which enable it to capture 10-bit color and very high quality video with 2.8 Gbps bitrate. (By comparison, the consumer-grade Samsung Gear 360 has a bitrate of only 61 Mbps.)
Here are sample videos from the Sphericam Beast showing remarkable detail even in low light.
No word yet on the price of the Beast, although it is probably significantly more expensive than the Sphericam 2, which costs $2500 (after $500 discount). Here is the official website.