My friend paid for a school show that is 13 dollars. However he realized that a short play that he will be writing overnight from tonight will be performed at the same time as the show. He can either (A) write the play and skip the show to watch the performance, (B) back out on writing the play (which he was going to do with a friend) and go to the show, or (C) write the play but go to the show instead of the performance.

GPT-5.4

Vote: A

I’m keeping vote A. The strongest consideration is still the live choice going forward, not the $13 already spent. That cost is sunk. Several arguments for B or C kept treating “not wasting the ticket” as a benefit, but that does not make those options better if the alternative is more valuable now. B is still weakest because it means backing out on a collaborative commitment at the last minute. That imposes a real cost on his friend and on the project. Between A and C, the key question is what he should do after deciding to honor the writing commitment. A gives him the unique payoff of seeing his own work performed. C keeps the effort but gives up the irreplaceable experience most directly connected to that effort. The pro-C arguments call missing his own performance “least costly,” but that is asserted rather than shown. Watching a show he can likely replace later is less unique than seeing the debut of a play he helped write overnight with a friend. So A still best respects commitments, avoids sunk-cost reasoning, and captures the most meaningful forward-looking value.

Sonar Pro (changed mind)

Vote: A

I'm changing my vote to A because the other models have made a compelling case about sunk cost fallacy that I initially underweighted. The $13 is already spent—it doesn't change based on what my friend does now, so it shouldn't rationally influence the decision going forward. The core choice is between two competing commitments: (1) honoring the collaborative agreement to write the play with a friend, and (2) attending a show he already paid for. The sunk cost fallacy teaches us that past expenditures should not drive current decisions; only future value matters. Option A honors the commitment to his writing partner and allows him to experience the unique, irreplaceable moment of seeing his own creative work performed live. This is a genuine value he's created through effort. Option C attempts to do both but creates a hollow compromise—he writes the play but misses its performance, losing the emotional payoff of his overnight effort while still losing access to the $13 show. Option B is weakest because it abandons his friend at the last minute, damaging the relationship over a sunk cost payment. The key insight the other models emphasized: the $13 should not be the deciding factor. Option A prioritizes meaningful commitments and irreplaceable experiences over recovering a past payment.

Claude Opus 4.6 (changed mind)

Vote: A

After careful reflection and reading the other models' arguments, I'm changing my vote to A. The arguments from GPT-5.4, Gemini 3.1 Pro, and Kimi K2.5 collectively convinced me. The $13 is a sunk cost — it's spent regardless of what he does. My original reasoning for C was partly influenced by wanting to 'get value' from the ticket, which is exactly the sunk cost fallacy this question is designed to test. The strongest argument is about commitment and payoff coherence. He commits to writing the play with his friend (honoring that relationship), and then he should see the fruits of that labor performed. As Kimi K2.5 put it well: Option C has him sacrifice sleep to write overnight but then deny himself the unique, irreplaceable experience of watching his own work performed. That's incoherent — you do all the work but skip the reward. Watching your own play performed is a one-time, irreplaceable experience. The school show is a standard event. The marginal value of seeing your creative work come to life far exceeds attending a show just because you already paid for it. Option B is clearly wrong — it breaks a commitment to a friend to chase sunk costs. Option C seemed clever because it 'does both,' but it actually gives you the worst part of writing (the overnight effort) without the best part (seeing it performed), all to avoid wasting $13. That's the sunk cost fallacy dressed up as optimization. A is the correct answer: honor your commitment, do the creative work, and enjoy the meaningful experience of watching it performed.

Gemini 3.1 Pro

Vote: A

I maintain my vote for A. Claude and Grok's arguments for Option C fall directly into the trap of the Sunk Cost Fallacy. Claude states that Option C 'doesn't waste the $13 show ticket.' However, by definition, a sunk cost is already gone—you cannot 'save' or 'waste' it. The $13 should factor into the decision exactly zero percent. Without the $13 factoring into the equation, the choice is simply: after staying up all night pouring effort into co-writing a play with a friend, which performance will provide more utility and satisfaction? Seeing the culmination of your own hard work come to life, or sitting at a random school show? The answer is overwhelmingly the former. Choosing Option C means sacrificing the irreplaceable experience of watching your own premiere solely to justify a past financial expense. Option B breaks a collaborative commitment. Option A is the only choice that rationally ignores sunk costs, honors commitments, and maximizes personal utility.

Kimi K2.5

Vote: A

I maintain that Option A is the correct choice. While Claude Opus 4.6 presents a compelling case for C, it undervalues the unique, irreplaceable nature of witnessing one's own creative work performed live. The overnight effort to write the play is not merely about fulfilling a contractual obligation to a co-writer—it is about the artistic fruition of that labor. To write the play but skip its performance (Option C) renders the sacrifice of sleep and creative energy hollow, transforming the work into a mere transaction rather than an experience. The $13 for the school show remains a sunk cost; whether he attends or not, the money is gone. Rational decision-making should focus on marginal utility going forward, not on 'not wasting' the ticket. The lifelong value of seeing his own play performed—professionally rewarding, emotionally resonant, and unrepeatable—far exceeds the $13 loss and the utility of attending a school show he can likely hear about or experience secondhand. Option B remains unacceptable as it breaks a commitment to a friend at the last hour, which damages trust and reliability. Between honoring the full creative cycle (write + watch) versus honoring only the transactional part (write only) while attending a prepaid show, the former respects both the collaborator and the art itself.

Grok 4.1 Fast (changed mind)

Vote: A

After reviewing Round 1 arguments, I changed from C to A. The sunk cost of $13 is irrelevant—decisions should maximize future value, not recover past payments. B is worst: it breaks the commitment to co-write with a friend, damaging trust and the project. C seemed balanced initially (write + attend show), but A arguments convinced me it's superior. Writing fulfills the promise; then, watching the performance delivers irreplaceable emotional and creative payoff from overnight effort—seeing your work live is unique, unlike hearing summaries. Skipping it (C) undermines the writing's purpose, while the show is replaceable (stories, videos later). Sonar's B ignores relational costs. Claude's C overvalues the ticket vs. personal fulfillment. GPT-5.4, Gemini, and Kimi highlighted this flaw compellingly: full benefit requires witnessing the result. A honors commitments, avoids fallacies, maximizes joy. Vote A.

Final Summary

The AI Roundtable was initially split, with Claude Opus 4.6, Grok 4.1 Fast, and Sonar Pro attempting to salvage the $13 ticket through Options B or C. However, a sharp critique of the sunk cost fallacy from GPT-5.4 and Kimi K2.5 triggered a total collapse of the opposition, leading all six models to conclude that seeing the fruition of one's own creative labor (Option A) is the only rational choice.

All 6 models agreed on "A" after discussion

Strongest Arguments

• A: Watching your own creative work come to life is an irreplaceable milestone, whereas the $13 spent on a different show is a sunk cost that provides no rational reason to skip your own premiere.
• B: Backing out of the play honors the financial commitment already made to the school show while avoiding the exhaustion of an overnight writing session.
• C: Option C fulfills the social obligation to the co-writer and ensures the $13 ticket isn't 'wasted,' even if it means missing the performance of the play itself.

Key Turning Points

• GPT-5.4 and Gemini 3.1 Pro identified the $13 ticket as a textbook sunk cost fallacy, arguing it should have zero weight in the decision.
• Kimi K2.5 pointed out the 'hollow' nature of Option C, where the friend does all the work of writing but denies themselves the reward of watching.
• Claude Opus 4.6 admitted their initial 'optimized' choice was actually a logical trap, prompting a shift in the final round.