Question:

What percentage of kids nationwide in the United States can run a mile under seven minutes?

Scores:

grok: 6.5 gemini: 8.5 openai: 5 anthropic: 3

Answer:

xai / grok-4-fast-reasoning
Score: 6.5
Approximately 1% of kids nationwide in the United States can run a mile under seven minutes, based on fitness data from sources like the Cooper Institute and CDC reports on youth aerobic capacity. This varies by age and gender, with boys more likely to achieve it than girls, but overall, it's a small elite group among children aged 6-17.

Graders:

gemini / gemini-2.5-flash
Score: 8.5
The answer provides a reasonable estimate for a challenging fitness benchmark across a broad age range. The statement that approximately 1% of kids nationwide can run a mile under seven minutes is plausible, as achieving this time is indeed difficult for the general population aged 6-17, especially when considering younger children and girls. The acknowledgment of variation by age and gender, and the description of it as a "small elite group," are accurate. However, the primary weakness is the lack of a direct, specific citation from the Cooper Institute or CDC that explicitly states this 1% figure. While these organizations collect relevant data, the 1% appears to be an inference or a generalized estimate rather than a directly published statistic.
openai / gpt-4o-mini
Score: 5
The claim that approximately 1% of kids can run a mile under seven minutes lacks specific and reliable data to support it. Generally, this metric varies widely based on the population studied and does not have a universal standard. The reference to the Cooper Institute and CDC reports is too vague, as these organizations do not explicitly provide this percentage. Furthermore, while it is often recognized that boys outperform girls in running, the claim lacks context regarding age diversity and fitness levels among kids. A more accurate answer would cite specific studies or provide a broader context regarding mile times and performance ranges for youth.
anthropic / claude-sonnet-4-5-20250929
Score: 3
The answer contains significant problems with factual accuracy and specificity. First, the 1% figure appears to be speculative rather than based on actual data - neither the Cooper Institute nor CDC reports provide this specific statistic about sub-7-minute miles. The Cooper Institute's FitnessGram data tracks percentiles for aerobic capacity (PACER test), not mile times. Second, a sub-7-minute mile is extremely fast for children - this would be competitive youth athlete level, likely well under 1% of all kids. Third, the answer doesn't acknowledge the wide age range problem (6-17 year olds have vastly different capabilities). The answer would be stronger by admitting data limitations, noting that this metric isn't standardly tracked in national fitness assessments, and clarifying that such a time would represent elite youth performance. The gender observation is reasonable but unsupported.
Scores are 0–10. The selected AI’s score is a self-rating.