| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | May 1, 2027 (2027 cycle) |
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| Cost | $5,793 (2027 cycle) | Catalog terms: Free attendance; check separate expenses; 2027: Unconfirmed — check official site | Last year's cycle (2026): $1,418–$6,173; 2027: 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 | Last year's cycle (2026): Limited need-based discount: Amount: Unconfirmed — check official site. Students eligible for free or reduced lunch with a GPA of 3.5 or better are encouraged to apply.; 2027: 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): Resident program fee (housing, three meals a day, events, transportation): $887–$1,637. $887 for one week, $1,637 for two weeks; included in the resident totals.; Application deposit, applied to the final bill: $75. Non-refundable.; Tuition deposit to hold a seat, applied to the final bill: $300. Non-refundable.; Limited need-based discount: Amount: Unconfirmed — check official site. Students eligible for free or reduced lunch with a GPA of 3.5 or better are encouraged to apply.; 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 11–12 (provider uses rising grades) | Grades 10–12 (provider uses rising grades) |
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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) | Minimum age 16; Residency: Attend a Northern California high school (public, charter, private or homeschool); Requirement: Open to rising grades 11–12; Requirement: At least 16 years old by the start of the workshop; Requirement: Students who are 18 at the start must be U.S. citizens; Requirement: Cumulative GPA of 3.3 or higher; Requirement: Science GPA of at least 3.5; Requirement: Biology and Chemistry, or Integrated Science Series I and II, completed by the end of the current school year; Requirement: Eligible to access LLNL under Section 3112 of the 2025 National Defense Authorization Act, which generally bars citizens of China, Russia, Iran and North Korea without dual U.S. citizenship or permanent residence | Requirement: Open to rising grades 10–12; Requirement: Must have completed the first year of high school by the summer; Requirement: Credit-bearing courses: GPA of 3.0 or better, primarily for rising seniors; rising juniors need a GPA of 3.5 or better; Requirement: Non-credit courses recommended for students with a GPA of 3.0 or better; Requirement: Recommended English proficiency for international students: mid-B2 level (TOEFL 80, IELTS 6, DET 115) |
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| Session dates or duration | 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 | Starts June 21, 2027; Ends July 30, 2027; 1–2 weeks (2027 cycle) |
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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 | Non-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 | Livermore, CA | Bronx, NY |
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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) | Selection: Applications are competitive and space is limited; LLNL publishes no acceptance rate or guaranteed cohort size on the official page. Application materials: Letter of recommendation from a Biology or Chemistry teacher | Selection: Rolling course-by-course admission until capacity, with course caps often around 20. Applicant volume, acceptance rates, and discount counts are not published. Application materials: Letter of recommendation (rising juniors applying to credit-bearing courses); Audition song (Musical Theatre Workshop) |
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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 2026-10-24 | 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 2026-10-24Source 7 · checked 2026-08-21Source 8 · checked 2026-08-21 |
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