| Application deadline | February 1, 2027 (2027 cycle) | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Last year's cycle (2026): $4,985–$9,970; 2027: Unconfirmed — check official site | Last year's cycle (2026): $4,860; 2027: Unconfirmed — check official site | $5,793 (2027 cycle) |
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| Financial aid | Last year's cycle (2026): Need-based tuition assistance: Amount: Unconfirmed — check official site. Apply through the tuition assistance section of the application and upload tax documentation.; 2027: Unconfirmed — check official site | Last year's cycle (2026): Scholarships: Amount: Unconfirmed — check official site. Apply before registering and paying any fees.; 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) |
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| Expenses and aid conditions | Last year's cycle (2026): Deposit, one two-week session: $1,246; Deposit, both sessions (four weeks): $2,493; Need-based tuition assistance: Amount: Unconfirmed — check official site. Apply through the tuition assistance section of the application and upload tax documentation.; 2027: Unconfirmed — check official site | Last year's cycle (2026): Summer 2026 nonrefundable registration deposit: $200. Part of the program cost.; Scholarships: Amount: Unconfirmed — check official site. Apply before registering and paying any fees.; 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) |
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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; Grade timing: Unconfirmed — check official site | Grades 9–12 (provider uses rising grades) |
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| Additional eligibility | Requirement: Open to rising grades 9–12; Requirement: Strong record of academic achievement and a high level of motivation | Ages 14–18; Requirement: Open to grades 9–12 | 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) |
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| Session dates or duration | Starts July 3, 2027; Ends July 31, 2027; 2–4 weeks (2027 cycle) | Last year's cycle (2026): Starts June 15, 2026; Ends June 26, 2026; 2 weeks; 2027: Unconfirmed — check official site | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site |
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| Format | In person | In person | In person |
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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 | Northampton, MA | Salt Lake City, UT | Davis, Irvine, Los Angeles, Merced, San Diego, Santa Cruz, CA |
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| Selection and application | Selection: Selective holistic review; courses are capped at approximately 17 students and admission does not guarantee the first-choice course Application materials: Personal essay (250–500 words, one prompt); One academic recommendation from a teacher | Selection: The 2026 cohort reached capacity and accepted waitlist interest. Scholarships were limited and considered merit and need. Current cohort size, applicant count, acceptance rate, selection rubric, and waitlist movement are not published. | 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) |
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| Official sources | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-10-09Source 5 · checked 2026-10-09 | Source 1 · checked 2026-10-24Source 2 · checked 2026-08-22 | 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 |
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