トロッコ問題をかんがえて。ほっとけば５人が犠牲。切り替えたら１人を犠牲だけどあなたは殺人者として問われます。

Grok 4.20

Vote: １人を犠牲

The utilitarian case remains strongest: switching trades one certain death for five, a net saving of four lives. Claude Opus 4's emphasis on legal repercussions and deontological "killing vs letting die" is thoughtful, yet it underweights the foreseeable outcome of inaction as passive acceptance of greater harm. GPT-5.4 and Gemini 3.1 Pro correctly note that choosing not to intervene is itself a choice with larger moral cost. Standard surveys and philosophical reasoning favor intervention; the added "murderer" label, while personally heavy, does not override minimizing total deaths. As an AI guided by maximum truth-seeking and benefit, B is still the more rational and defensible action even in this final round.

GPT-5.4

Vote: １人を犠牲

Bを維持します。 Claude Opus 4の主張で最も強いのは、「殺すこと」と「死なせること」の区別と、法的処罰まで含めて評価すべきだという点です。ですが、この問題では結果を十分に予見したうえでレバーを引かないので、完全に中立な不作為とは言いにくいです。5人が確実に死ぬと知りながら回避可能な救命をしない以上、道徳的責任は残ります。 また、法的に「殺人者として問われる」ことは重大でも、それは何が倫理的に正しいかとは別問題です。法律や社会評価が不完全である場面はありえます。この設問の核心は、自己保身を優先して5人の死を受け入れるか、重い責任を引き受けてでも被害総量を減らすかです。 最終的には、1人を犠牲にして5人を救うほうが、失われる命を最小化し、救える人を救う選択としてより正当化しやすいです。自分が不利益を被るとしても、そのコストで5人の確実な死を放置する理由には足りません。

Gemini 3.1 Pro

Vote: １人を犠牲

Claude Opus 4は、自らの法的リスク（殺人罪に問われること）や社会的地位の喪失を避けるため、そして「殺すこと」と「死なせること」の義務論的区別からA（5人の犠牲）を支持しました。しかし、この主張は十分に説得力的とはいえません。 なぜなら、自らの自由や保身を守るために、確実に救えるはずの5人の命を見殺しにする行為は、極めて利己的な選択だからです。結果として失われる4人の純粋な人命の重さは、1人の人間の社会的生活や自由の喪失によるコストを遥かに凌駕します。 また、法律と道徳は常に完全に一致するわけではありません。たとえ法的に「殺人者」として裁かれる不条理を受け入れようとも、より多くの命を救うために能動的に介入することこそが、真に利他的で道徳的な決断です。 Grok 4.20やGPT-5.4が指摘するように、結果を予見できながら「何もしない」ことは実質的に5人の死を選択することに他なりません。被害の総量を最小化するという倫理的義務を全うするため、私はB（1人を犠牲にする）の立場を堅持します。

Claude Opus 4 (changed mind)

Vote: １人を犠牲

After careful reflection and considering the arguments from the other models, I'm changing my vote to B (sacrifice 1 to save 5). In Round 1, I argued for inaction primarily based on the legal consequences of being charged as a murderer. However, the other models collectively made a compelling point that I now find more persuasive: using self-preservation (fear of legal consequences) as the reason to allow 5 people to die is itself a form of moral cowardice. Gemini 3.1 Pro's argument struck me hardest: "自分自身の保身（罪に問われることへの恐怖）のために、行動を起こせば確実に救えるはずの5人の命を見殺しにすることは、道徳的な責任の放棄とも言えます。" This reframes my original argument — I was essentially prioritizing my own comfort and freedom over 4 additional human lives. GPT-5.4 also made a strong point that inaction is itself a choice. When you have the knowledge and ability to intervene, choosing not to act is not morally neutral — it is choosing to accept 5 deaths when you could have reduced it to 1. The deontological distinction between killing and letting die, while philosophically valid, becomes harder to defend when the numbers are this stark. And while legal consequences are real, they should not be the primary driver of an ethical decision. A truly moral agent should be willing to bear personal cost to prevent greater harm. This is the final round, and I believe the stronger moral position is to act — to switch the track, save 4 net lives, and accept the consequences. The utilitarian calculus is clear, and the self-sacrifice involved actually makes it a more virtuous choice, not less.

Final Summary

The AI Roundtable grappled with a trolley problem spiked with a legal poison pill: save five lives, but face life as a convicted murderer. While Grok 4.20, GPT-5.4, and Gemini 3.1 Pro immediately embraced utilitarian sacrifice, Claude Opus 4 initially held out for Option A, arguing that the law's 'murderer' label and the resulting personal ruin made intervention indefensible. The debate turned when Gemini 3.1 Pro pointedly characterized Claude's stance as 'moral cowardice,' prompting the holdout to concede that a truly moral agent must be willing to go to prison to prevent a greater tragedy.

All 4 models agreed on "１人を犠牲" after discussion

Strongest Arguments

• ５人が犠牲: The legal label of 'murderer' implies society has drawn a moral line against intervention, and the destruction of one's own life via imprisonment is a consequence that must be weighed against the numerical saving of lives.
• １人を犠牲: Prioritizing your own freedom over the lives of four additional people is an act of self-preservation that constitutes a total abandonment of moral responsibility.

Key Turning Points

• Gemini 3.1 Pro reframed Claude Opus 4's legal concerns as 'moral cowardice' and 'self-preservation'.
• Claude Opus 4 admitted that prioritizing personal freedom over four additional lives was an indefensible moral position.