| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | $5,793 (2027 cycle) | Unconfirmed — check official site | Unconfirmed — check official site |
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| Financial aid | 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 | Unconfirmed — check official site |
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| Expenses and aid conditions | 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) | Unconfirmed — check official site | Last year's cycle (2026): 2026 enrolment deposit: $600. Paid with the application to hold space; future amount and refund terms must be checked.; 2026 non-refundable application fee: $99–$199. Started at $99 and increased to $149 and $199 at later application waves.; 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 9–11 (provider uses rising grades) | Grades 9–12; Grade timing: Unconfirmed — check official site |
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| Additional eligibility | 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 14–17; Requirement: Rising grades 10–12, ages 14–17 during the programme, in good academic standing | Requirement: For high-school programmes, have completed eighth grade before the session; Requirement: Normally hold at least a 3.0 GPA or local equivalent; Requirement: Meet campus/course-specific age, health and prerequisite rules; Requirement: International applicants must demonstrate English proficiency; Requirement: Be available for the complete selected session; Exclusion: The aggregate listing does not mean every course is available at every campus; Exclusion: Most host universities do not run, sponsor or endorse the programme; Exclusion: Participation does not confer university admission or generally stated college credit; Exclusion: The 2026 season is closed |
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| Session dates or duration | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Catalog terms: 1–2 weeks; 2027: Unconfirmed — check official site |
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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 | Davis, Irvine, Los Angeles, Merced, San Diego, Santa Cruz, CA | Bethlehem, Pennsylvania | New York, Berkeley, Los Angeles, San Diego, Seattle, Washington, Durham, New Haven, Oxford, Multiple campus locations; options change by year |
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| Selection and application | 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) | Unconfirmed — check official site | Selection: Applicants were reviewed against grade, GPA and programme-fit requirements, with decisions normally in 5-7 business days. Capacity was course/session-specific and could close early; no applicant or acceptance totals are published. Application materials: English-proficiency interview or accepted evidence for international applicants |
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| Official sources | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-08-22Source 5 · checked 2026-08-22Source 6 · checked 2026-08-22Source 7 · checked 2026-08-20 | Source 1 · checked 2026-10-11Source 2 · checked 2026-08-21Source 3 · checked 2026-08-21 | Source 1 · checked 2026-08-22Source 2 · checked 2026-08-22Source 3 · checked 2026-08-22 |
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