Inorganic in the sense of lacking any carbon.

But now I'm thinking to do all again in the second version, but this time with carbon, because I saw carbon is everywhere, and if there's no escape to it, it will be impossible to have inorganic life in a cold world (with temperature ranging from -150°C to 0°C).

But even having carbon, the molecules will be different from our biochemistry, because such forms of life I have in mind will develop in an ocean made of primordial soup consisted of water, ammonia, alcohols, maybe hydrocarbons, other organics and some salts. And such creatures would develop in a reducing atmosphere, rich in nitrogen and methane, like the air of Titan, but having more methane.

Life developing in a reducing and cold world (the world I have in mind have average temperature of -50°C). Maybe in this world life will develop faster in shallow sea where there's a lot of hydrothermal vents. And then migrate to surface.

Even being a cold world, it would must have much volcanism or many active geysers or hydrothermal vents, to not finish like Mars. It's a cold, but living world, not a dead Mars, as far as we know.

And such world would have mass similar to Earth or higher.