This page documents the back-to-school effect on AI usage, drawing on OpenRouter’s usage data (a ~2.5M-user panel, popularized by Futurism), a Rutgers study of 10,000 ChatGPT prompts, and Bloomberg/Sherwood reporting on the annual rebound.
The AI Behavior Index is the research arm of OneChat AI, an integrated multi-model AI platform. We compile and analyze data from primary research sources to make AI adoption and market trends more accessible to journalists, researchers, and decision-makers.
Why we present this as a real effect (unlike general “seasonality”): most claimed AI seasonality doesn’t survive scrutiny, but the school-calendar effect does — it’s visible in token data, corroborated by an academic prompt study, shows the expected weekly sawtooth, and repeats annually. We present it as genuine while flagging the two honest caveats: the magnitude was widely exaggerated (the “70%” figure), and it’s specific to student usage, not the whole user base.
Methodology notes: the token-volume data is from OpenRouter’s panel (~2.5M users), a large but partial sample of total ChatGPT usage, so absolute magnitudes are directional. Different trackers reported summer dips ranging ~20–50%; we cite the range and flag the exaggerated “70%” claim. The Rutgers study (10,000 prompts) supports the academic-usage interpretation but is a sample. The effect is strongest for consumer/student use and weaker for professional and non-U.S. usage, so it doesn’t generalize to “all AI adoption.”
Sources used on this page:
- Futurism / OpenRouter — OpenAI Usage Plummets in Summer 2025 (token data; peak/trough)
- ImaginePro / Rutgers — AI Usage Declines When School Is Out 2025 (academic fingerprint)
- Sherwood — ChatGPT Use Picks Up as Students Return 2025 (September rebound)
- Fact-check — The “70% Collapse” Was Overstated 2025 (magnitude caveat)
Corrections or suggestions: research@aibehaviorindex.org