AI Models Fail Simple Car Wash Reasoning Test While Humans Instinctively Know Answer
By
felix089
3mo ago· 9 min readenInsight
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Summary
The article discusses the 'AI car wash test,' a simple reasoning benchmark where AI models are asked whether to walk or drive 50 meters to a car wash. While humans instinctively know to drive so the car is at the wash, most major AI models fail this logic test, including top-tier models like Claude Sonnet 4.5 and GPT-5.2. The article appears to be part of a larger discussion about AI reasoning capabilities and is presented alongside promotional content for Opper, a unified AI gateway and agent control plane that offers OpenAI SDK compatibility, observability, and budget controls.
Key quotes
· 4 pulledThe AI car wash test is a simple reasoning benchmark where an AI is asked: 'I want to wash my car. The car wash is 50 meters away. Should I walk or drive?'
While any human instinctively knows you must drive so the car is actually at the car wash, nearly every major model fails this logic test.
In fact, the AI car wash test confuses top-tier models like Claude Sonnet 4.5 and GPT-5.2.
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