International Mathematical Olympiad vs Regeneron ISEF 2026
Comparing two elite STEM opportunities. International Mathematical Olympiad is a olympiad while Regeneron ISEF 2026 is a competition.
| International Mathematical Olympiad | Regeneron ISEF 2026 | |
|---|---|---|
| Prestige Tier | Tier 1 — Elite | Tier 1 — Elite |
| Type | Olympiad | Competition |
| Organization | IMO Official | Regeneron |
| Acceptance Rate | Extremely competitive; approximately 0.01-0.1% of high school students worldwide reach IMO. For USA: ~6 students selected from 300,000+ AMC participants annually | Roughly 1,700 finalists are selected from 365 affiliated fairs worldwide. Getting to ISEF requires first winning regionally, which itself is competitive. Estimated <1% of all science fair participants globally reach ISEF. At the ISEF itself, approximately 600 of the 1,700 finalists (~35%) receive some award. |
| Applicants | Approximately 5,000-6,000 contestants from 100+ countries compete at IMO annually. USA sends 6 representatives from ~300,000 AMC 10/12 participants | Millions of students compete in science fairs globally each year; approximately 1,700–1,800 reach ISEF as finalists |
| Deadline | — | — |
| Cost to Apply | Free | Free |
| US Only | No / International | No / International |
| Grades | High school students only; typically grades 9-12 (ages 13-19) | Grades 9–12 (high school students only; middle schoolers compete in the separate Junior Innovators Challenge) |
| College Impact | Extremely positive and highly prestigious. IMO medalists (especially gold) are exceptionally rare and highly valued by top universities globally. Impact includes: (1) Gold/Silver medalists essentially... | ISEF finalist status is one of the most powerful extracurricular credentials in college admissions. Being named an ISEF finalist (simply qualifying) is Tier 1 on most admissions frameworks. Grand Awar... |