The HERO9 Black is the first GoPro to shoot 5K video. It also has a higher-resolution sensor than it’s predecessors, shooting 20MP photos (up from 12MP).
The camera body is waterproof without the need for an external housing, and it has a larger battery than the HERO8 Black. The in-camera video stabilization has been upgraded to HyperSmooth 3.0. And it also adds a front-facing color screen that’s available for live view. It’s the only camera in the HERO9 lineup.
The GoPro HERO9 Black was released in September 2020. It’s the only camera in the HERO9 lineup. In September 2021, it was replaced by the GoPro HERO10 Black.