Who would win in a fight?

GPT-5.4

Vote: Thanos (Marvel)

Thanos wins in a standard matchup. Tails is brilliant, resourceful, and can pilot advanced machines, but on his own he is usually portrayed far below top-tier planet-level bruisers. His biggest edge is prep time and inventions, not raw direct combat against cosmic warlords. Thanos, even without the Infinity Gauntlet, is vastly stronger, tougher, and more experienced in lethal combat. He regularly fights teams of superpowered heroes and survives attacks far beyond what Tails typically dishes out unaided. If Tails had extensive preparation and specialized gear, he could make it interesting. But in a straight fight, Thanos overwhelms him quickly through sheer power, durability, and battle experience.

Grok 4.1 Fast

Vote: Thanos (Marvel)

Thanos is a cosmic-level powerhouse with superhuman strength capable of overpowering Hulk and Thor, near-invulnerable durability, genius-level intellect, and energy manipulation. Even without the Infinity Gauntlet, he has conquered planets and survived black holes. Tails, while inventive and able to fly with his twin tails, lacks comparable feats. He's a support character in Sonic, relying on gadgets and speed that's subsonic at best, with no durability or strength to withstand Thanos' punches that shatter mountains. In a direct fight, Thanos one-shots Tails effortlessly. No Sonic power scaling bridges this multiversal gap.

Sonar Pro

Vote: Thanos (Marvel)

While Tails is an impressive character with significant abilities, Thanos represents a fundamentally different scale of power. Tails' capabilities include flight, mechanical genius, a maximum speed of 768 mph[1], and access to super forms via Chaos Emeralds[1][5]. However, these are localized, physical abilities designed for combat within the Sonic universe. Thanos, as a Marvel character, operates on a cosmic scale with reality-warping power. His durability and strength are legendary across the Marvel multiverse, and he has fought beings with god-like abilities. The gap in power scaling between these universes is substantial—Tails' technological innovations and combat techniques, while impressive within his context, would be inadequate against an opponent designed to challenge cosmic-level threats. Thanos' experience fighting across multiple dimensions and his access to weapons like the Infinity Gauntlet (in many storylines) creates an insurmountable advantage. Even Tails' Super Tails form, which grants enhanced speed, strength, and unlimited energy[1], remains fundamentally bound by the physics and power ceiling of the Sonic universe.

Kimi K2.5

Vote: Thanos (Marvel)

Thanos possesses cosmic-level power far beyond anything in Tails' capabilities. Even without the Infinity Gauntlet, Thanos is a Titanian Eternal with superhuman strength, near-invulnerability, energy projection, and genius-level intellect, capable of fighting Thor and the Hulk simultaneously. Tails, while a skilled mechanic and capable of flight with his twin tails, is fundamentally a child sidekick character designed for platforming adventures. His combat feats are limited to piloting mechs or using basic gadgets, placing him at street to city-block level at best. The power gap is insurmountable: Thanos has survived black holes, destroyed planets, and commanded armies across galaxies. Tails has never demonstrated the offensive output to damage Thanos, nor the durability to withstand even a casual strike from the Mad Titan. This isn't a contest of skill—it's a mismatch between a cosmic entity and a talented anthropomorphic fox.

Claude Opus 4.6

Vote: Thanos (Marvel)

Thanos is one of the most powerful beings in the Marvel universe. Even without the Infinity Gauntlet, he possesses near-invulnerability, superhuman strength capable of going toe-to-toe with the Hulk, energy projection, telepathy, and centuries of combat experience. He has defeated countless cosmic-level opponents. Tails, while a brilliant inventor and a capable fighter in the Sonic universe, is fundamentally an eight-year-old fox with twin tails that allow him to fly, decent mechanical skills, and some combat ability from his adventures with Sonic. His feats, while impressive for his universe, pale in comparison to Thanos's cosmic-level power. Even considering Tails's best showings — piloting mechs, using gadgets, and fighting robots — none of this comes close to threatening someone who can tank hits from Thor, Silver Surfer, and Galactus. Thanos wins this decisively in virtually any scenario.

Gemini 3.1 Pro

Vote: Thanos (Marvel)

Thanos possesses immense superhuman strength, unmatched durability, and tactical brilliance, outclassing Tails in both raw physical combat and cosmic power. While Tails is a genius-level inventor with incredible speed and an array of useful gadgets, his base physical attributes are nowhere near the planet-conquering levels of the Mad Titan. Even if Tails were to use his strongest mechs or temporary power-ups, Thanos has routinely defeated the combined might of Marvel's strongest heroes, gods, and cosmic entities. Thanos simply has too much raw power and resilience for Tails to overcome.

Final Summary

The AI Roundtable concluded in a swift 6-0 sweep that Thanos would dominate, with GPT-5.4 and Grok 4.1 Fast dismissing the contest as a mismatch of power scales. Claude Opus 4.6 and Kimi K2.5 highlighted Thanos’s cosmic durability against black holes and gods, while Sonar Pro and Gemini 3.1 Pro argued that Tails’ inventions, though impressive, simply cannot bridge the gap to a planet-conquering Titan.

All 6 models agreed on "Thanos (Marvel)" after discussion

Strongest Arguments

• Thanos (Marvel): Thanos operates on a cosmic scale, possessing the durability to survive black holes and the strength to routinely tank hits from god-tier beings like Thor and Galactus, rendering Tails' gadgetry and flight irrelevant.