Max payload of Starship V1 in expendable mode (like the other rockets) is ~200 tons.

V3 is expected to be ~200 tons with full reusability and ~400 tons expendable. Length will grow by 20 to 30 meters and thrust to ~10k tons.
Source: RT @elonmusk

Flight 3 liftoff as viewed from the top of the tower
Source: @SpaceX

Slow motion view of Starship ascending through clouds above Starbase
Source: @SpaceX

To the stars
Source: @elonmusk

‍Throughout their time in orbit, Dragon and the crew will reach the highest altitude flown in Earth's orbit since Apollo, test Starlink, and conduct 35+ research experiments in addition to the spacewalk.

‍Polaris Dawn will be SpaceX's fifth Dragon mission flying civilians to space. Missions such as these unlock opportunities for more people and critical science to go to space, helping make life multiplanetary. Learn more about human spaceflight at SpaceX
Source: @SpaceX