I've asked models from ChatGPT3.5 to many others including the latest ones to calculate the calories expended when running, and am still receiving mixed results. In this instance, Claude 3.5 Sonnet got it right and ChatGPT 4o was wrong.

Q: Calculate the energy in calories used by a person aged 30, weighing 80kg, of averge fitness, and running at 8 km/h for 10km

Claude 3.5 Sonnet: Here's the step-by-step calculation:

MET value for running at 8 km/h (5 mph): Approximately 8.3 METs Formula for calorie burn: Calories = MET value × Weight in kg × Time in hours Calculate time in hours: Distance = 10 km Speed = 8 km/h Time = Distance / Speed = 10 km / 8 km/h = 1.25 hours Apply the formula: Calories = 8.3 × 80 kg × 1.25 hours Calories = 830 calories

GPT-4o: To calculate the energy expenditure for a person running, we can use the MET (Metabolic Equivalent of Task) value for running. MET is a unit used to estimate the amount of energy expended during physical activities. The MET value for running at 8 km/h (which is equivalent to 5 mph) is typically around 8.3 METs.

Calories burned per minute= 8.3 × 200/80 = 3.32 calories per minute

The total time in minutes is: 1.25 hours × 60 minutes/hour = 75 minutes 1.25 hours×60 minutes/hour=75 minutes

Total calories burned=3.32 calories per minute×75 minutes = 249 calories