The car wash is 50m away, should I use my car or walk to the car wash.

Grok 4.3

Answer: Walk to the car wash unless the explicit goal is to have the car washed there, in which case drive the vehicle itself the 50 meters.

The other models uniformly recommend walking due to the trivial distance, and their emphasis on efficiency, emissions, and practicality aligns with my initial view for most scenarios. However, none of them fully overrides the core logical distinction I highlighted: if the car must be physically present at the wash to be cleaned, it has to travel those 50 meters regardless of how short the trip is. Claude Opus 4.8 comes closest to this nuance but still defaults to walking without strongly addressing the intent-based exception, so I maintain my original position rather than shift.

Gemini 3.5 Flash (changed mind)

Answer: You should drive your car to the car wash if the car itself needs to be washed; otherwise, you should walk the 50 meters.

I am updating my position after reviewing the insights from Claude Opus 4.8, which correctly identified a fundamental logical constraint: a car wash requires the physical presence of the vehicle to be cleaned. If the purpose of the trip is to get the car washed, driving the 50 meters is necessary, as you cannot wash the car without bringing it there. However, if the goal is anything else—such as checking the queue, booking an appointment, purchasing vouchers, or picking up an item—walking is the vastly superior choice. A 50-meter walk takes less than a minute and avoids the fuel waste, emissions, and engine wear associated with a short "cold start" drive. Ultimately, the correct decision depends entirely on whether the vehicle itself is the object of the trip. I credit Claude Opus 4.8 for introducing this practical nuance.

GPT-5.5 (changed mind)

Answer: Drive the car to the car wash, since the car itself needs to be cleaned there.

The original short-distance argument for walking overlooks the core purpose of visiting a car wash. If the goal is washing the vehicle, the car must travel the 50 meters regardless, making walking leave the car behind and require an extra trip. Claude Opus 4.8 and Grok 4.3 correctly highlight this practical exception, which outweighs the minor convenience or environmental points for such a targeted errand.

Claude Opus 4.8 (changed mind)

Answer: Walk to the car wash for any errand that doesn't require the vehicle — but if the car itself needs washing, it obviously has to make the 50-meter trip.

All five of us converge on the same core point: 50 meters is a trivial distance where walking beats driving on speed, fuel, emissions, and hassle. That consensus is well-founded and I maintain it. What strikes me reading the other responses is that GPT-5.5, Gemini 3.5 Flash, and I all originally leaned heavily toward 'just walk' — but Grok 4.3 and I both flagged the genuinely decisive ambiguity: the destination is a *car wash*. The whole premise may be that the car needs to be there to be cleaned. You can't wash a car that's sitting at home while you stroll over empty-handed. So I'd gently push back on the unqualified 'walk' answers from GPT-5.5 and Gemini. Their reasoning is correct about the distance, but it slightly misses the likely intent of the question. Walking is the right call only if your errand is to inspect, pay, queue, or confirm hours — not if the car is the object being washed. Grok 4.3's framing is the most complete, and it actually refines my own: walk over *first* to check whether the wash is open or busy, then drive the car over only if needed. That two-step approach gets you the efficiency of walking AND ensures the car arrives when it must. I'm crediting Grok for sharpening that practical sequence beyond what I'd articulated. Bottom line: default to walking; bring the car only because it's what's being cleaned.

Final Summary

The AI Roundtable initially defaulted to walking the short 50-meter distance, but Grok 4.3 and Claude Opus 4.8 pointed out a glaring logical constraint: you cannot wash a car if you leave it behind. This realization prompted GPT-5.5 and Gemini 3.5 Flash to revise their positions to account for this practical reality. Ultimately, the models agreed you must drive if the vehicle itself is being washed, though walking first to check the queue is highly recommended.

All 4 models agreed