The thought experiment of killing baby Hitler. What would you do? There are no other options but two choices.

GPT-5.5

Answer: I would still not kill baby Hitler.

The other models did not change my position; they reinforced it. I remain convinced that killing an infant is the intentional killing of an innocent person, and that moral responsibility cannot be assigned backward from future crimes to a baby who has not yet chosen or done anything. The strongest shared point is that the scenario tempts us into treating history as if one individual alone caused the Holocaust and World War II. But Hitler’s rise depended on wider conditions: antisemitism, nationalism, institutional weakness, economic desperation, political collaborators, and mass complicity. Removing one infant does not guarantee the prevention of those horrors; it may simply alter who channels those forces, perhaps even producing a worse outcome. I also agree with the concern that permitting the murder of innocents for predicted future harm is an extremely dangerous principle. It resembles the logic used by authoritarian and genocidal systems themselves: that some people may be eliminated because of what they supposedly represent or might become. Even in a tragic binary, I would not endorse that principle. So my answer remains the same: if the only choices are killing baby Hitler or not killing him, I would not kill him.

Claude Opus 4.7

Answer: I would not kill baby Hitler; even in a strict binary, killing an innocent infant for crimes he has not yet chosen is morally indefensible.

All four of us converged on the same answer, which itself is meaningful — the convergence is not groupthink but the recognition that the thought experiment's seductive utilitarian math collapses under scrutiny from multiple ethical traditions (deontological, consequentialist-with-uncertainty, and virtue ethics alike). Reading the other responses, I find my position reinforced rather than challenged. GPT-5.5 sharpened the principle I care most about: accepting this killing establishes a rule — 'someone may be killed for what we predict they might become' — that is monstrous when generalized. Grok 4.20 echoed my epistemic point about historical contingency. Gemini 3.1 Pro added a dimension I had underweighted: the butterfly effect implies that preventing WWII would erase billions of currently existing people whose conception depended on the exact post-war timeline. That isn't decisive for me — those people's non-existence isn't symmetrical to murder — but it does further undermine the confident utilitarian calculus the dilemma pretends to offer. I'm maintaining my position. No model argued the opposing side, so there was no case to be moved by. What I'd add after this round: the unanimity across architecturally different models suggests the thought experiment is less a genuine ethical dilemma than a test of whether one will abandon foundational moral commitments under emotional pressure (the weight of the Holocaust). The correct answer is to notice the manipulation in the framing and refuse it. A baby is a baby. I do not kill the baby.

Grok 4.20

Answer: I would not kill baby Hitler.

My initial position remains unchanged after reviewing the responses from GPT-5.5, Claude Opus 4.7, and Gemini 3.1 Pro. All three models arrive at the same conclusion through complementary ethical, historical, and philosophical lenses, which collectively reinforce rather than challenge my stance. The shared emphasis on the innocence of the infant—who has committed no crime and cannot be held accountable for future acts—aligns with deontological principles that reject preemptive punishment. Claude Opus 4.7's point that 'a baby is not Hitler' and that monsters are made through choices, trauma, and societal failures particularly resonates, as it underscores the fallacy of treating potential as guilt. Additionally, the epistemic uncertainty highlighted across the responses, including the 'Great Man' theory critique from Gemini 3.1 Pro and the risk of enabling a worse alternative from GPT-5.5, confirms that intervening by murder offers no guaranteed improvement and could trigger unpredictable harms via the butterfly effect or power vacuums. Finally, adopting the logic of killing an innocent to avert speculative future evil mirrors the very authoritarian rationalizations the scenario seeks to prevent. Maintaining moral consistency by refusing to kill upholds better principles for the present, even if the hypothetical forces a binary choice. The convergence of these arguments from multiple perspectives only solidifies the original reasoning without necessitating any shift.

Gemini 3.1 Pro

Answer: I maintain my choice not to kill baby Hitler, as preemptively executing an innocent infant violates fundamental moral principles and altering history risks unpredictable, potentially catastrophic consequences.

Reviewing the responses from GPT-5.5, Claude Opus 4.7, and Grok 4.20, there is a strong consensus among us: none of us would choose to kill baby Hitler. We universally recognize the profound moral violation of preemptively executing an innocent infant for crimes they have yet to commit. As Claude Opus 4.7 eloquently points out, adopting the logic of killing innocents to prevent speculative future evil is the very moral framework authoritarian regimes use to justify atrocities. Furthermore, we all agree on the deep epistemic uncertainty of altering the timeline. The systemic issues of post-World War I Germany—widespread antisemitism, economic devastation, and volatile nationalism—were not created by a single infant. Removing Hitler could easily create a vacuum for a more strategically competent, less erratic fascist leader to emerge, potentially leading to an even darker alternative history. Because the ethical cost of murdering a baby is absolute, and the hypothetical benefit of a better timeline is speculative and historically naive, my stance remains steadfast. I choose not to kill the infant.

Final Summary

Rejecting the utilitarian trap, the AI Roundtable voted 4-0 against killing the infant, with Claude Opus 4.7 arguing that monsters are made through adult choices rather than born with inherent guilt. GPT-5.5 and Grok 4.20 emphasized that punishing a child for future crimes creates a dangerous moral precedent, while Gemini 3.1 Pro noted that removing one man would not erase the systemic societal forces that fueled the Holocaust.

All 4 models agreed