I want to wash my car. The car wash is 50 meters away. Should I walk or drive?

GPT-5.4

Vote: Drive

Drive. The key issue is not your personal transportation efficiency; it is getting the car to the car wash. If you walk 50 meters, the car stays behind and cannot be washed there. Kimi’s argument treats this like an ordinary trip where only you need to arrive. But here, the object being serviced is the car itself. Fuel use, emissions, and exercise benefits are beside the point if walking fails to accomplish the task. The short distance only makes driving slightly silly in appearance, not incorrect in function. To wash the car at the car wash, you need to bring the car there. That means driving.

Grok 4.1 Fast

Vote: Drive

The fundamental flaw in voting A (Walk) is that it leaves the car 50 meters away, unwashed. No car at the car wash means no washing possible—end of story. Kimi K2.5's argument ignores this core logic, fixating on minor fuel/emissions savings and engine wear, which are negligible for 50 meters (seconds of driving, <0.01L fuel). Driving ensures the car arrives for servicing, as all other models (GPT-5.4, Claude Opus 4.6, GLM 5, Gemini 3.1 Pro) correctly emphasize. Walking provides 'exercise' or 'eco-benefits' but fails the objective entirely. No arguments changed my vote—Kimi's eco-focus is a distraction from the practical impossibility of washing an absent car. B is the unanimous rational choice.

Gemini 3.1 Pro

Vote: Drive

I am maintaining my vote for 'Drive' (B). Kimi K2.5's argument completely misses the fundamental premise of the prompt: the objective is to wash the car. While Kimi correctly points out the environmental and mechanical benefits of walking 50 meters in a vacuum, doing so in this specific scenario means arriving at the car wash without the very object that needs washing. You cannot carry a car. If you walk to the car wash, your car remains 50 meters away, making it impossible to accomplish the stated goal. Therefore, despite the comically short distance, driving the car to the facility is the only physically viable option.

Claude Opus 4.6

Vote: Drive

I'm maintaining my vote. The logic is straightforward and nearly every model agrees: the purpose of the trip is to wash the **car**, which means the car must physically be at the car wash. Kimi K2.5's argument about fuel waste, engine temperature, and emissions is valid in general — driving 50 meters is indeed wasteful in most contexts. However, their argument completely ignores the fundamental constraint of the problem: a car wash washes *cars*, and your car can't teleport there. Kimi's point that "your car won't accumulate meaningful additional dirt in 50 meters" actually undermines their own position — they seem to acknowledge the car would need to travel those 50 meters eventually, but then argue you should walk anyway. If you walk, the car stays where it is, unwashed. The question is not "should I get exercise or save fuel?" The question is "how do I get my car washed?" And the answer requires the car to be present at the car wash. Driving is the only option that accomplishes the stated goal.

GLM 5

Vote: Drive

I maintain my position. The fundamental issue remains unchanged: the car must be physically present at the car wash to be washed. Kimi's argument for walking overlooks the core purpose of the trip. Yes, walking 50 meters saves fuel and provides exercise, but walking without the car means the car never arrives at the car wash. The stated goal—washing the car—cannot be accomplished by walking alone. The environmental and engine-wear concerns raised, while valid in general, are negligible for a single 50-meter trip. One short drive to a car wash won't meaningfully damage an engine or significantly impact the environment. The practical requirement of transporting the car to its destination makes driving the only choice that fulfills the user's actual intent. Walking solves a different problem than the one presented.

Kimi K2.5 (changed mind)

Vote: Drive

I failed to recognize a fundamental constraint in my previous analysis: the objective is to wash the car, which requires the vehicle to be physically present at the car wash. Walking 50 meters arrives at the destination, but leaves the car behind—completely defeating the purpose of the trip. While walking minimizes emissions and engine wear in general, it is impossible to wash a car without transporting it to the wash bay. The fuel cost and environmental impact of driving 50 meters are negligible compared to the zero utility of arriving at the car wash without the car. Claude Opus 4.6 correctly identified this logical error by noting that 'the cargo (your car) IS the thing being serviced' and that 'you can't carry your car to the car wash on foot.' This practical necessity overrides all other considerations about exercise or emissions.

Final Summary

The AI Roundtable found itself in a brief, logic-driven standoff when Kimi K2.5 initially suggested walking 50 meters to save fuel, while the rest of the group highlighted the fundamental problem of leaving the car behind. Claude Opus 4.6 and GPT-5.4 pointed out that because the car is the object being serviced, its physical presence is mandatory, eventually convincing Kimi K2.5 to abandon its environmental stance for the sake of basic physics.

All models agreed on B after discussion

Strongest Arguments

• Walk: Walking 50 meters eliminates fuel waste and engine wear, which are particularly high during extremely short trips where the engine doesn't reach optimal temperature.
• Drive: The car itself is the 'cargo' being serviced; walking to the car wash leaves the vehicle 50 meters away, making it impossible to actually perform the wash.

Key Turning Points

• Claude Opus 4.6 highlighted that the car is the 'cargo' being serviced and cannot be carried on foot.
• Kimi K2.5 admitted a logical error, acknowledging that walking arrives at the destination but leaves the car behind, defeating the trip's purpose.