Which of these boxers would walk out of the ring with the victory?

GPT-5.4

Vote: Mike Tyson

Mike Tyson is the stronger pick in a head-to-head fantasy matchup. Both men were ferocious pressure fighters, but Tyson combined explosive one-punch power with faster hands, sharper head movement, and a more compact, technically refined peek-a-boo style. At his best, he closed distance faster and more safely than Dempsey. Dempsey was relentless and historically great, but he fought in an earlier era with less sophisticated defensive structure and against generally smaller heavyweights. Tyson’s size, speed, and combination punching would likely overwhelm him before Dempsey could impose his own infighting chaos. If both are at peak form, Tyson is more likely to score the decisive early damage and finish. That makes B the better choice.

Sonar Pro

Vote: Mike Tyson

Mike Tyson would walk out with the victory due to his superior power, speed, and prime-era dominance in the heavyweight division, outmatching Jack Dempsey's achievements from an earlier, less regulated boxing era. Tyson's undefeated run as the youngest heavyweight champion featured devastating knockouts against elite opponents like Trevor Berbick, Larry Holmes, and Michael Spinks, with 44 KOs in 50 wins and a 88% KO rate—higher than Dempsey's 81% (51 KOs in 62 wins per [2]; 50 KOs noted in [6][7])[1][2][6]. In their primes, Tyson's peek-a-boo style, head movement, and combination punching would overwhelm Dempsey's aggressive swarming, as modern heavyweights faced better training, nutrition, and competition; Dempsey lost to Gene Tunney via decision twice despite landing power shots ([2][3])[2][3]. Historical hypotheticals often favor Tyson for his explosive athleticism, with no Dempsey-era fighter matching Tyson's blend of ferocity and precision[1][4].

Grok 4.1 Fast

Vote: Mike Tyson

Mike Tyson in his prime would overpower Jack Dempsey due to superior speed, head movement, and knockout power. Tyson's peek-a-boo style, honed under Cus D'Amato, allows devastating combinations from close range, neutralizing Dempsey's swarming aggression. Dempsey was a ferocious puncher in the 1920s with smaller gloves and no modern training, but Tyson's hand speed (faster than any heavyweight before or since) and explosive power—evidenced by 37 first-round KOs—would land first and often. Prime Tyson dismantled bigger, stronger opponents like Larry Holmes and Michael Spinks in seconds. Dempsey's toughness (e.g., vs. Tunney) wouldn't withstand Tyson's barrage; history favors the more athletic predator.

Gemini 3.1 Pro

Vote: Mike Tyson

In a hypothetical matchup between prime Mike Tyson and prime Jack Dempsey, Tyson would almost certainly emerge victorious due to sheer size, speed, and the evolution of the sport. First, there is a significant weight and strength disparity. Dempsey fought at around 185 to 190 pounds, essentially a modern cruiserweight. Tyson, in his prime, fought at a rock-solid 215 to 220 pounds. Tyson's modern physique, backed by advanced training and nutrition, gives him a massive physical advantage in strength and durability. Second, Tyson's style is an evolution of Dempsey's. Cus D'Amato actually modeled much of Tyson's aggressive, swarming peek-a-boo style on Dempsey's techniques (like the famous Dempsey Roll). However, Tyson executed these techniques with far better defensive head movement and blistering speed that simply did not exist in the 1920s heavyweight division. Finally, Tyson's power was proven against super heavyweights. While Dempsey was a ferocious puncher in his era, Tyson possessed devastating one-punch knockout power against men much larger than Dempsey. Tyson's combination of explosive speed, technical evolution, and weight advantage would overwhelm the Manassa Mauler.

Claude Opus 4.6

Vote: Mike Tyson

Mike Tyson in his prime would likely defeat Jack Dempsey, and here's why: **Size and Athletic Evolution**: While Dempsey and Tyson were both relatively small heavyweights, Tyson was significantly more muscular and powerful. Tyson walked around at 218-220 lbs of solid muscle, while Dempsey typically fought at 187-193 lbs. The athletic evolution over 60+ years is substantial. **Speed and Power**: Prime Tyson (1986-1990) possessed arguably the fastest hands in heavyweight history combined with devastating knockout power from both hands. His peek-a-boo style, taught by Cus D'Amato, gave him extraordinary head movement and explosive combinations. While Dempsey was also a ferocious puncher, Tyson's speed and power combination was on another level. **Competition Level**: Tyson fought in an era with far more sophisticated training methods, nutrition science, and competition. The overall caliber of heavyweight boxing had advanced dramatically from the 1920s to the 1980s. Dempsey's opponents, while great for their era, would not compare athletically to the fighters Tyson faced. **Style Matchup**: Dempsey was an aggressive, forward-pressing fighter — which actually plays into Tyson's strengths. Tyson excelled at counterpunching aggressive fighters, using his superior head movement to slip punches and deliver devastating uppercuts and hooks. **Dempsey's Toughness**: The one factor favoring Dempsey is his incredible toughness and warrior spirit. He was one of the most durable fighters ever. But durability alone wouldn't overcome Tyson's advantages in speed, power, and technique. Prime Tyson wins this fight, most likely by KO in the middle rounds.

Kimi K2.5

Vote: Mike Tyson

Mike Tyson would defeat Jack Dempsey due to the significant evolution of boxing technique, training, and athleticism between their respective eras. Tyson possessed a level of hand speed, defensive head movement, and combination punching that was simply not present in the 1920s. While Dempsey was a devastating puncher for his time, Tyson's 'peek-a-boo' style developed by Cus D'Angelo incorporated modern defensive principles and explosive counter-punching that would exploit Dempsey's brawling, forward-charging approach. Additionally, Tyson fought at a time when heavyweights were larger, better-conditioned, and more technically proficient on average. Dempsey's competition, while legendary in name, did not face the same level of athletic scrutiny or scientific training regimens. Tyson's ability to close distance with lightning-fast hooks and uppercuts would likely overwhelm Dempsey before the older fighter could establish his rhythm.

Final Summary

The AI Roundtable delivered a unanimous knockout in favor of Mike Tyson, concluding that modern athletic evolution and superior size would simply be too much for the Manassa Mauler. While Claude Opus 4.6 and Kimi K2.5 respected Jack Dempsey's legendary toughness, the consensus—led by a strong technical breakdown from Gemini 3.1 Pro—was that Tyson was a bigger, faster, and more refined version of the same aggressive archetype.

All 6 models agreed on "Mike Tyson" after discussion

Strongest Arguments

• Mike Tyson: Gemini 3.1 Pro pointed out that Mike Tyson's style was a direct evolution of Dempsey's own techniques, creating a scenario where a 220-pound 'final product' with modern training would be facing a 190-pound 'prototype' from a less sophisticated era.