| 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 11–12; 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 | Requirement: Standing audience high-school juniors/seniors;2027specific intake instructions forthcoming. Optional credit admission separate. | 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 | Catalog terms: 4 weeks; 2027: 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 | Unconfirmed — check official site | In person |
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| Housing and supervision | Residential. Supervision and housing details: Unconfirmed — check official site | 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 | Unconfirmed — check official site | 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 | Application materials: Source-qualified route requirements: Onlineform/onepagestatement;credit6-8JPEG/PNGportfolio incl2observationaldrawings(onebox18x24),descriptiondimensions/media/date,zipupload,1schoolfaculty/stafforunrelatedadultrecommendation. Fees/formsdeadlinewaiting2027. | 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 2026-10-09Source 2 · checked 2026-10-09 | Source 1 · checked 2026-08-20 |
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