| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Last year's cycle (2026): $5,518; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Catalog terms: Free attendance; check separate expenses; 2027: Unconfirmed — check official site |
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| Financial aid | Last year's cycle (2026): 2026 need-based application and program assistance: Up to $5,564. Could assist with the $46 application fee and $5,518 program cost based on family income, family size and available funds; actual award not guaranteed.; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Expenses and aid conditions | Last year's cycle (2026): 2026 COSMOS application fee: $46. Nonrefundable; pending fee-waiver review could change when or whether payment was required.; Credit-card transaction fee on program payments: Amount: Unconfirmed — check official site. Approximately 2.5% when paying program costs by credit card; application fee exempt.; 2026 need-based application and program assistance: Up to $5,564. Could assist with the $46 application fee and $5,518 program cost based on family income, family size and available funds; actual award not guaranteed.; Full-financial-aid attendance deposit: $200. Required only for admitted students offered full aid and refunded to the legal guardian after successful completion.; 2027: Unconfirmed — check official site | Unconfirmed — check official site | 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; Grade timing: Unconfirmed — check official site | Grades 10–11 when applying; summer rising grade is one higher |
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| Additional eligibility | Residency: Attend high school in person in California; Requirement: Be rising into grade 9, 10, 11 or 12 for the program fall year; Requirement: Attend high school in person in California; Requirement: Demonstrate academic excellence and preparation for the selected STEM cluster; Requirement: Complete cluster-specific course prerequisites; Requirement: Live on the host UC campus for the full program; Requirement: Be a first-time COSMOS participant; Exclusion: Students not attending a California high school in person; Exclusion: Students who previously attended any COSMOS program; Exclusion: Applicants outside the rising-grade 9-12 range; Exclusion: Applicants unable to live on campus for the full program; Exclusion: Late application, supporting, payment or admission materials; Exclusion: Assuming a 3.5 GPA is an absolute statewide minimum rather than the published typical profile | Ages 14–18; Requirement: Be a high-school student age 14-18; Requirement: Submit the program and scholarship interest form for the applicable cycle; Requirement: Complete registration, payment, residential, health, consent, and credit-eligibility steps if offered a place; Requirement: Participate in the full residential academy; Exclusion: College credit has restrictions and is not available to every participant; Exclusion: Interest-form submission does not guarantee admission, scholarship, waitlist movement, college credit, credit transfer, prize, startup funding, company formation, sales, University admission, or admissions advantage | Minimum age 16; Citizenship: Students age 18 at the workshop start had to be U.S. citizens for the 2026 cycle; Citizenship: All applicants had to meet LLNL access restrictions under 2025 NDAA Section 3112; current official review controls; Residency: Attend a Northern California public, charter, private, or home school; Requirement: Be at least 16 by the first workshop day; Requirement: Enter grade 11 or 12 in fall 2026; Requirement: Have at least a 3.3 cumulative GPA; Requirement: Have at least a 3.5 science GPA; Requirement: Complete Biology and Chemistry or Integrated Science Series I and II by the end of the current school year; Requirement: Qualify for access to the Laboratory's non-public areas; Requirement: Attend every weekday and provide daily transportation, lunch, and a laptop; Exclusion: Students entering grade 10 in the cited cycle; Exclusion: Students younger than 16 at the start; Exclusion: Students outside the Northern California school requirement; Exclusion: Students age 18 at the start who were not U.S. citizens; Exclusion: Applicants who cannot obtain access under current national-security law and LLNL screening; Exclusion: Assuming legal permanent residence alone replaces the specific age-18 citizenship rule; Exclusion: Assuming the 2026 GPA, citizenship, school, or NDAA rules will remain unchanged in a later cycle |
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| Session dates or duration | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Last year's cycle (2026): Starts July 13, 2026; Ends July 24, 2026; 2 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 | Non-residential. Supervision and housing details: Unconfirmed — check official site |
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| Location | Davis, California, Irvine, California, Los Angeles, California, Merced, California, San Diego, California, Santa Cruz, California, UC Davis, UC Irvine, UCLA, UC Merced, UC San Diego, UC Santa Cruz | Salt Lake City, Utah, University of Utah, Lassonde Studios | Livermore, California, Lawrence Livermore National Laboratory non-public workshop areas |
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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: One personal statement; One required teacher recommendation, with two recommended | 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: Applications are competitive and space is limited; LLNL publishes no acceptance rate or guaranteed cohort size on the official page. Application materials: Biology or Chemistry teacher contact information for one recommendation |
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| Official sources | Source 1 · checked 2026-08-22Source 2 · checked 2026-08-22Source 3 · checked 2026-08-22Source 4 · checked 2026-08-22Source 5 · checked 2026-08-22Source 6 · checked 2026-08-22Source 7 · checked 2026-08-20 | Source 1 · checked 2026-10-12Source 2 · checked 2026-08-22 | Source 1 · checked 2026-08-20 |
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