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Claude Opus 5 vs GPT-5.6
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Claude Opus 5 vs GPT-5.6

compare their reasoning, instruction-following, and ability to avoid mistakes.

Prompt

You have 3 boxes labeled “Apples,” “Oranges,” and “Apples & Oranges.” Every label is wrong. You may pick one fruit from one box without looking inside. Which box should you pick from, and how can you correctly label all three boxes?

OpenAI logoOpenAIGPT-5.6 Luna (max)
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Anthropic logoAnthropicClaude Opus 5 (Adaptive Reasoning, Max Effort)
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