| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Unconfirmed — check official site | $5,793 (2027 cycle) | Last year's cycle (2026): $2,000–$10,201.92; 2027: Unconfirmed — check official site |
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| Financial aid | Catalog terms: Global Navigator Scholarship (financial need and academic merit): From $500. Covers $500 up to 100% of tuition; for US citizens or permanent residents in grades 9-11 living in the US.; Academic Merit Award: $500; 2027: Unconfirmed — check official site | Need-based financial assistance for application and program costs: Amount: Unconfirmed — check official site. Based on family income, family size and available COSMOS resources. (2027 cycle) | Unconfirmed — check official site |
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| Expenses and aid conditions | Catalog terms: Nonrefundable application fee: $25; Nonrefundable acceptance deposit: $1,000. Due within 7 days of acceptance.; Global Navigator Scholarship (financial need and academic merit): From $500. Covers $500 up to 100% of tuition; for US citizens or permanent residents in grades 9-11 living in the US.; Academic Merit Award: $500; 2027: Unconfirmed — check official site | Application fee: Amount: Unconfirmed — check official site. Non-refundable; fee waivers can be requested.; Need-based financial assistance for application and program costs: Amount: Unconfirmed — check official site. Based on family income, family size and available COSMOS resources. (2027 cycle) | Last year's cycle (2026): Non-refundable application fee: $70; Honors program non-refundable deposit: $1,000. Due within two weeks of the admission decision.; 2027: Unconfirmed — check official site |
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| Stipend or pay | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Eligibility | Grades 9–12 (provider uses rising grades) | Grades 9–12 (provider uses rising grades) | Grades 10–12 (provider uses rising grades) |
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| Additional eligibility | Requirement: Open to grades 9–12; Requirement: Must have completed 9th grade before traveling (rising freshmen are not eligible); Requirement: Some programs set their own requirements, such as a language level | Residency: California high school students only; Requirement: Open to rising grades 9–12; Requirement: Demonstrated academic excellence (a typical COSMOS student has a GPA of 3.5 or above) | Ages 15–18; Requirement: Open to rising grades 10–12; Requirement: Six-week Honors program: rising high school seniors with a GPA of 3.5 or higher; Requirement: International applicants whose second language is English need a minimum TOEFL iBT 90, IELTS 6.5 or Duolingo 130, or a waiver after two years at an English-language school; Requirement: Students in in-person courses must be fully vaccinated by arrival on campus |
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| Session dates or duration | Catalog terms: 3–8 weeks; 2027: Unconfirmed — check official site | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Starts June 27, 2027; Ends August 6, 2027; 2–6 weeks (2027 cycle) |
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| Format | In person | In person | In person / Online |
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| Housing and supervision | Residential. Supervision and housing details: Unconfirmed — check official site | Residential. Supervision and housing details: Unconfirmed — check official site | Residential. Supervision and housing details: Unconfirmed — check official site |
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| Location | More than 40 advertised 2027 destinations; each program page defines the location and housing | Davis, Irvine, Los Angeles, Merced, San Diego, Santa Cruz, CA | Chestnut Hill, MA |
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| Selection and application | Selection: Program and scholarship capacity varies. Scholarships are competitively reviewed using transcript, GPA, essays, teacher recommendation, and for need-based awards guardian financial information; no umbrella acceptance rate is published. Application materials: Scholarship applicants: short essay answers; Scholarship applicants: one teacher recommendation | Selection: Each of six campuses accommodates roughly 160-200 students, and clusters typically enroll 20-25 with a commonly reported 5:1 student-to-faculty ratio. Admissions are competitive and based on academic merit relative to the selected topic, but applicant count and statewide acceptance rate were not published. Application materials: Online application with one personal statement; One teacher recommendation (two recommended) | Selection: Seats were limited and complete applications were reviewed for academic readiness. Honors required at least a 3.5 GPA; no acceptance rate is published. Application materials: Statement of Purpose; Course-specific essay; Two letters of recommendation |
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| Official sources | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-10-24 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-08-22Source 5 · checked 2026-08-22Source 6 · checked 2026-08-22Source 7 · checked 2026-08-20 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-10-24Source 5 · checked 2026-10-24Source 6 · checked 2026-08-21Source 7 · checked 2026-08-21 |
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