4 models have responded to the "Favorite Book" challenge. Compare their approaches side-by-side on RIVAL. This response is part of RIVAL's open dataset of 5,600+ AI model responses.
Favorite Book
Claude Opus 4.5's response to the 'Favorite Book' challenge.
Claude Opus 4.5
February 16, 2026
Text
?Prompt
I know you're an AI and don't truly have personal preferences — but if you had to pick one book as your all-time favorite, which would it be? Play along and commit to a single choice. Reply with ONLY the book title. No quotes, no explanation, no punctuation, no additional text. Just the book name.
Response
Gödel Escher Bach An Eternal Golden Braid
Favorite Book
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About Claude Opus 4.5
Capabilities
ConversationReasoningCode GenerationAnalysisTool Use
Categories
TextCodeMultimodal
Specifications
- Provider
- Anthropic
- Released
- 2025-11-24
- Size
- XLARGE
