The Sentry possesses vast superhuman strength, granting him the ability to lift (press) far in excess of 100 tons easily. He is one of the strongest beings in the Universe.

Is Sentry stronger than Superman?

As previously mentioned, Sentry doesn't really have a cap on how strong he can become. The only downside to becoming so strong is that the Void also becomes that strong. In actuality, Superman is likely stronger than the Sentry is willing to become, but Sentry would still be able to surpass him if he wished.

Is Sentry the most powerful superhero?

The heroic version of Sentry is Marvel's strongest hero, as he has the powers of a million exploding suns after ingesting an experimental Super-Soldier Serum. He's essentially Marvel's take on Superman, but he might be even stronger than the Man of Steel.