My 2015 Sony a7s2 has “native” iso to 102400, and expanded to 409600, but it was a special full frame low light sensor and it’s only 12MP (most from back then were 20-30MP with the same sized sensor.

From Wikipedia:

For still images, the α7S II’s ISO is 100–102400 with expansion down to ISO 50 and up to ISO 409600 equivalent. For movies, the α7S II’s ISO is 100-102400 equivalent with expansion down to ISO 100 and up to ISO 409600 equivalent. For still images or movies on auto setting, the camera’s ISO is 100–12800 with selectable lower and upper limits.[2]

Also apparently one was installed on the ISS