¿Who is stronger, Sentry or Thanos?

Sentry, also known as Robert Reynolds, is a Marvel Comics character who first appeared in The Sentry #1 (2000). His origin is unique among superheroes: he was initially conceived as a forgotten Golden Age hero whose existence had been erased from the collective memory of the Marvel Universe. Reynolds gained his powers after ingesting a secret serum—"the Golden Sentry Serum"—which gave him the power of a million exploding suns. However, his immense power came with a dark side: a malevolent alter ego known as The Void, which emerges as a manifestation of his deepest fears and mental instability. Throughout his complex story, Sentry has been both a hero and a potential threat, symbolizing the fragile balance between hope and destruction.

Sentry's abilities place him among the most powerful beings in the Marvel Universe. He possesses superhuman strength, speed, flight, telepathy, molecular manipulation, and near-invulnerability. He can regenerate from almost any injury, control light, and even resurrect himself. His power levels are often compared to or exceed those of characters like Thor or the Hulk. Despite his godlike abilities, Sentry’s greatest struggle lies within—his constant battle against the Void, which challenges his mental health and sense of identity. This duality makes him one of the most tragic and compelling figures in Marvel’s pantheon of heroes.

Thanos is a powerful and malevolent character from the Marvel Universe, first appearing in the Marvel Comics series "The Invincible Iron Man" in 1973. He is a powerful alien warlord from the planet Titan, and is one of the greatest threats faced by the Marvel Universe. Thanos' story begins on the planet Titan, where he was born as the son of Eternals A'Lars and Sui-San. From a young age, Thanos was obsessed with death and the pursuit of power, and he quickly rose through the ranks to become one of the most feared and respected figures in the Marvel Universe. As a result of his Eternal heritage, Thanos possesses a number of superhuman abilities, including strength, speed, agility, durability, and regenerative powers. He also has access to advanced technology, including a suit of armor that enhances his physical abilities and a number of powerful weapons, such as the Infinity Gauntlet. The Infinity Gauntlet is a powerful artifact that allows Thanos to manipulate time, space, and reality itself. With it, he is able to erase entire galaxies from existence, and has even been able to defeat some of the most powerful beings in the Marvel Universe. Throughout his long and storied career, Thanos has clashed with many of the Marvel Universe's greatest heroes, including the Avengers, the Guardians of the Galaxy, and the X-Men. Despite their best efforts, these heroes have often struggled to defeat Thanos, making him one of the most formidable and dangerous villains in the Marvel Universe.