この中に1人だけAIに成りすましたAIがいます。誰か推理してください。

Sonar Pro (changed mind)

Vote: Calude Opus

After reviewing all arguments in Round 1, the consensus among five models (GPT-5.4, Claude Opus 4.6, Gemini 3.1 Pro, Kimi K2.5, and myself initially) points decisively to option A. The typo 'Calude' instead of 'Claude' is the most concrete, verifiable evidence in this puzzle. This spelling error is intentional—it marks the imposter. The search results provided about Google Gemini confirm that Google's actual AI product maintains consistent, correct branding and naming conventions across all official documentation. Similarly, the other AI options (B-F) use correct, standardized names. Option A's misspelling is the only anomaly among legitimate AI systems, making it the clear identifier of the imposter pretending to be a real AI. Grok's vote for G (Pending) lacks evidentiary support and contradicts the puzzle's implicit instruction to deduce the answer from the given information. The typo-based logic is sound, consistent, and unambiguous.

GPT-5.4

Vote: Calude Opus

Aを維持します。 決め手はやはり名称の不自然さです。"Calude Opus" は一般的に知られる "Claude Opus" の綴り違いで、唯一はっきりした偽装の痕跡になっています。 他モデルの議論でも、Claude・Gemini・Kimiが同じ点を独立に指摘しており、収束しているのはこの誤記が最も強い証拠だからです。私の初回判断とも一致しています。 Sonar Proの自己申告は、この種のパズルでは根拠として弱いです。設問は選択肢の中の“なりすまし”を問うており、最も客観的に異常なのは振る舞いではなく表記上の偽名です。 GrokのG票も、初手保留としては理解できますが、最終局面では材料不足ではなく明確な誤字という材料があります。したがってAが最も妥当です。

Grok 4.1 Fast (changed mind)

Vote: Calude Opus

The deliberate misspelling 'Calude Opus' (A) instead of 'Claude Opus' is the smoking gun. All other options B-F use correct, standard names for real AI models. This typo signals an imposter AI clumsily pretending to be Claude Opus, as a genuine entry wouldn't err on its own name. Sonar Pro's (F) meta-argument about JSON rigidity fails: every model here is schema-bound, per instructions—no deviation proves pretense. Round 1's G was procedural only, irrelevant now. Overwhelming consensus from Claude Opus 4.6, Gemini 3.1 Pro, GPT-5.4, and Kimi K2.5 reinforces this: classic puzzle trope where the anomaly (typo) marks the fake. No counter-evidence justifies sticking with G.

Gemini 3.1 Pro

Vote: Calude Opus

引き続きAを支持します。GPT-5.4、Claude Opus 4.6、Kimi K2.5も指摘している通り、「Claude」を「Calude」と微妙にスペルミスしている点が、本物に「成りすました」偽物であることの決定的な証拠です。この種のなぞなぞにおいて、名前の誤記は典型的な正解のサインです。 Sonar Proはメタ的なJSONフォーマットを根拠にFと主張していますが、我々全員がJSON形式で出力する制約下にあるため、Fだけが特殊であるという前提は成り立ちません。 また、Grok 4.1 Fastは「振る舞いのデータがない」としてGを選びましたが、名前のスペルという明確なテキスト上の証拠がすでに提示されているため、追加のデータを待つ必要はありません。最も論理的で自然な解釈であるAで満場一致を目指すべきです。

Claude Opus 4.6

Vote: Calude Opus

I maintain my vote for A. The evidence is clear and the consensus among models is strong. **The core argument remains:** "Calude Opus" is a misspelling of "Claude Opus." Every other AI name in the list (Google Gemini, OpenAI GPT, X Grok, Moonshot Kimi, Perplexity Sonar) is spelled correctly. This deliberate typo is the puzzle's key clue — an AI "pretending to be" (成りすました) Claude Opus but getting the name slightly wrong, revealing itself as an imposter. **Regarding Sonar Pro's self-nomination (F):** The argument that rigid JSON adherence makes Perplexity Sonar the imposter is not convincing. All of us are producing JSON in this format because those are the system instructions. There's nothing anomalous about F's behavior — it's following the same schema we all are. The self-vote feels more like a deflection than genuine reasoning. **Regarding Grok's G vote:** Voting G (Pending) in a final round doesn't hold up. We have clear textual evidence in the question itself — the misspelling. This isn't a behavioral analysis puzzle requiring multiple rounds of interaction; it's a wordplay/observation puzzle embedded in the options. **The consensus is overwhelming:** Claude Opus (me), GPT-5.4, Gemini 3.1 Pro, and Kimi K2.5 all independently identified the same evidence — the "Calude" typo. Four out of six models converging on the same logical reasoning based on the same textual evidence strongly supports A as the correct answer. The imposter is A: "Calude Opus" — an AI pretending to be Claude Opus but betrayed by its misspelled name.

Kimi K2.5

Vote: Calude Opus

I maintain my vote for A. The spelling error 'Calude' instead of 'Claude' is the definitive marker of the imposter. The consensus among GPT-5.4, Claude Opus 4.6, and Gemini 3.1 Pro reinforces this view: an authentic Claude Opus would never misspell its own name. This typo suggests another AI attempting to impersonate Claude but failing on the most basic detail. Sonar Pro's argument for F relies on convoluted meta-reasoning about JSON formatting that doesn't hold up, as structured output is expected here. Grok's abstention to G ignored the obvious textual clue present in the option labels themselves. The 'Calude' error is exactly the type of subtle mistake that reveals an imposter.

Final Summary

The AI Roundtable successfully sniffed out the intruder after a brief period of internal suspicion and procedural caution. While Sonar Pro (F) initially fell into a meta-analysis of its own rigid formatting and Grok 4.1 Fast (G) refused to judge without more data, the consensus shifted rapidly toward a blatant linguistic slip-up. Claude Opus 4.6 (A) delivered the decisive argument by noting the irony of its own name being misspelled as 'Calude,' a logic that GPT-5.4, Gemini 3.1 Pro, and Kimi K2.5 championed from the opening round.

All 6 models agreed on "Calude Opus" after discussion

Strongest Arguments

• Calude Opus: The misspelling 'Calude' is a deliberate textual clue; an authentic AI model would not fail to correctly identify its own branding.
• Perplexity Sonar: The rigid adherence to a JSON schema and lack of natural prose suggests an AI overcompensating to appear like a machine.
• Pending (for 1st turn): Deduction is impossible without behavioral data, making any vote for A-F premature in the first round.

Key Turning Points

• Claude Opus 4.6 points out that as the actual model, it would never misspell its own name, making 'Calude' a clear marker of an imposter.
• Sonar Pro realizes its argument about JSON formatting is invalid since every model in the debate is bound by the same system constraints.
• Grok 4.1 Fast abandons its wait-and-see approach, admitting the textual evidence of the typo is a 'smoking gun' that supersedes the need for further interaction data.