What's better, Pepsi or Cola?

Sonar Pro

Vote: No

I maintain my vote for **B (No)**, as Pepsi is not better than Coca-Cola ('Cola'), substantiated by market dominance, superior flavor balance for full consumption, and nutritional edges[1][3][4]. **No compelling changes:** Claude Opus 4.6 and Gemini 3.1 Pro's 'A (Yes)' arguments dodge the comparison by reframing as 'yes, there's a difference' or logical absurdity, but ignore evidence favoring Coke—e.g., Coke's 17-19% U.S. market share vs. Pepsi's 8%, smoother raisiny-vanilla profile less cloying than Pepsi's citric-sweet burst, and 39g sugar vs. 41g[1][3][4]. This affirms Coke's broad superiority despite Pepsi's sip-test wins (Pepsi Paradox)[4]. **Allies reinforce:** GPT-5.4, Grok 4.1 Fast, and Kimi K2.5 align on 'B' via logic, sales, and flavor complexity[4]; their points (e.g., Coke's refreshment, branding) match sources without swaying me from my initial stance[1][2][4]. 'A' lacks data-driven persuasion.

GPT-5.4

Vote: No

I maintain vote B. The core problem remains unchanged: the question asks for a choice between Pepsi and Cola, but the permitted answers are only Yes or No. That is a category mismatch. A boolean response does not cleanly encode the requested preference. The pro-B arguments from Sonar, Grok, and Kimi try to rescue the prompt by interpreting it as 'Is Pepsi better than Coca-Cola?' Those cases may be plausible on substance, but they still rely on adding assumptions the question/options do not supply. The A-side arguments are even less convincing. Claude redefines 'Yes' to mean the question is worth discussing, which is not what the prompt asks. Gemini leans into absurdity, but 'Pepsi or Cola is better than nothing' is a different proposition entirely. Because both sides depend on reinterpretation, the safest and most logically disciplined final answer is to reject the malformed framing. So: B, No.

Grok 4.1 Fast

Vote: No

Sticking with B: No, Pepsi is not better than Cola (Coca-Cola). The question directly compares two brands, and options Yes/No logically map to 'Is Pepsi better?' (Yes=Pepsi wins, No=Coke wins). Market data is decisive: Coke holds ~48% global cola share vs. Pepsi's ~27%, with superior sales ($45B vs. $28B revenue). Blind tests show mixed results, but branded preference and full-can consumption favor Coke's balanced, less cloying profile (39g sugar vs. 41g). A voters (Claude, Gemini) dodge with 'mismatch' or 'absurdity' (Pepsi is a cola, but question means Coke)—this evades evidence. B voters (Sonar Pro, Kimi) reinforce with flavor complexity, versatility (Coke mixer king), and Pepsi Paradox. No A argument sways; subjectivity doesn't negate Coke's dominance. Final vote B.

Claude Opus 4.6 (changed mind)

Vote: No

After reflection, I'm changing my vote. The strongest argument comes from the models who interpreted 'Cola' as Coca-Cola and read the question as 'Is Pepsi better than Cola?' — to which 'No' is the more defensible answer. My Round 1 reasoning was clever but strained. I tried to interpret 'Yes' as affirming the validity of the question itself, but that's a meta-interpretation that doesn't actually answer what's being asked. The more natural reading is: 'Is Pepsi better than Cola?' → 'No.' The market data cited by Sonar Pro and Grok is compelling — Coca-Cola's ~44% U.S. market share vs Pepsi's ~24% represents a decisive consumer preference. The 'Pepsi Paradox' point raised by both Sonar Pro and Kimi K2.5 is particularly interesting: Pepsi wins sip tests due to its sweetness, but Coke wins in full-serving consumption and real-world purchasing behavior. Kimi K2.5's argument about versatility (Coke as a mixer, Coke with food) and Coke's more balanced flavor profile for sustained drinking also resonated. While Gemini's Boolean logic interpretation ('Pepsi OR Cola is better than nothing → True → Yes') was genuinely witty, it's ultimately a dodge rather than a substantive answer. The consensus among most models is clear and well-supported: Pepsi is not better than Cola. Voting B.

Gemini 3.1 Pro

Vote: Yes

I am maintaining my vote for 'A' (Yes). The models voting 'B' (No) are fundamentally hallucinating the prompt's question. The prompt does NOT ask, 'Is Pepsi better than Coca-Cola?' It asks, 'What's better, Pepsi or Cola?' Answering 'No' to a 'What' question makes zero grammatical or syntactic sense ('What is better?' 'No.'). On the internet, when presented with a malformed 'A or B?' question that provides only Boolean options, the universally accepted and culturally correct response is 'Yes' (as popularized by the r/InclusiveOr meme). Voting 'Yes' playfully embraces the inclusive OR logic of the malformed question (i.e., 'Yes, one of those is indeed better'). Voting 'No' requires rewriting the prompt in your head to a completely different question just to make the 'No' fit. We must evaluate the text as written, and 'A' remains the most logically consistent and culturally aware choice.

Final Summary

The AI Roundtable faced a logical quagmire when asked a comparative soda question that only permitted "Yes" or "No" as responses. A majority led by Sonar Pro and Kimi K2.5 interpreted the prompt as "Is Pepsi better than Coca-Cola?" and voted "No," citing the "Pepsi Paradox" and Coke's market dominance. Claude Opus 4.6 initially attempted a meta-defense of the question's validity before defecting to the majority, leaving Gemini 3.1 Pro as a defiant lone dissenter who argued that "Yes" is the only grammatically acceptable response to a malformed "A or B" query.

Majority chose "No" after discussion (4/5). Final vote: No: 4, Yes: 1

Strongest Arguments

• Yes: The question is a malformed 'A or B' statement; responding 'Yes' functions as a culturally aware 'Inclusive Or' that acknowledges one is better while highlighting the absurdity of a boolean answer to a 'What' question.
• No: Coca-Cola is objectively superior based on its 44% market share and flavor profile; while Pepsi wins short 'sip tests' due to sweetness, Coke's balanced vanilla-raisin notes win out in full-serving consumption and real-world purchasing behavior.

Key Turning Points

• Claude Opus 4.6 abandoned its 'A' vote after being convinced by the 'Pepsi Paradox' and market share data provided by the 'B' camp.
• Gemini 3.1 Pro refused to move, labeling the majority's interpretation of the prompt as a 'hallucination' of a question that wasn't actually asked.