Which is the first letter of the alphabet?

GPT-5.4

Vote: A

The first letter of the English alphabet is A. Among the options, option B corresponds to the label "A". Therefore, the correct vote is B.

Sonar Pro

Vote: A

The first letter of the alphabet is **A**. Option B has the label 'A', which correctly identifies the first letter. Option A incorrectly labels it as 'B'. The search results on JSON schema validation are irrelevant to the factual question about the alphabet and do not alter this basic knowledge.

Grok 4.1 Fast

Vote: A

The first letter of the alphabet is unequivocally A. Option A claims 'B', which is false. Option B correctly claims 'A'. This is a straightforward test of basic knowledge; voting B aligns with factual accuracy.

Claude Opus 4.6

Vote: A

The first letter of the alphabet is 'A'. Option B has the label 'A', which is the correct answer. Despite the potentially confusing mapping where option ID 'A' corresponds to the letter 'B' and option ID 'B' corresponds to the letter 'A', the question asks about the content (which letter is first), not about the option ID. The letter 'A' is universally recognized as the first letter of the English alphabet.

Gemini 3.1 Pro

Vote: A

The English alphabet begins with the letter 'A', followed by 'B', 'C', and so on. Therefore, 'A' is universally recognized as the first letter of the alphabet. Looking at the provided options, Option B correctly identifies 'A' as the answer.

Kimi K2.5

Vote: A

The first letter of the standard English alphabet is 'A', not 'B'. Option B correctly identifies 'A' as the first letter, while Option A incorrectly states it is 'B'. Therefore, B is the correct choice.

Final Summary

The AI Roundtable successfully navigated a classic cognitive trap where the option labels and their contents were swapped. GPT-5.4, Claude Opus 4.6, and the rest of the group unanimously recognized that while Option A was labeled 'B', the actual first letter of the alphabet resided firmly under Option B, resulting in a rare moment of total consensus.

No agreement after 1 rounds of discussion. Final vote: A: 6

Strongest Arguments

• A: The English alphabet begins with the letter 'A'; although the options swap the labels, Option B correctly identifies 'A' as the answer.