| 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 | Last year's cycle (2026): $899; 2027: Unconfirmed — check official site | Last year's cycle (2026): 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 | Last year's cycle (2026): Core-program lunch and snacks: $0. Provided during the 2026 core program; dietary coverage and future availability should be confirmed.; 2027: Unconfirmed — check official site |
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| Stipend or pay | Unconfirmed — check official site | Unconfirmed — check official site | Last year's cycle (2026): 2026 successful completion stipend: $800; 2027: Unconfirmed — check official site |
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| Eligibility | Grades 9–12 (provider uses rising grades) | Grades 10–12 (provider uses rising grades) | Grades 9–12; Grade timing: Unconfirmed — check official site |
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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 15–17; Requirement: For 2026, be a rising high-school sophomore, junior, or senior age 15-17; Requirement: Demonstrate academic performance, authentic media interest, and potential to benefit from and contribute to camp; Requirement: Be able to live in supervised shared university housing and remain on campus; Requirement: Submit original application responses without generative AI; Exclusion: Rising freshmen and current middle-school students were ineligible in 2026; Exclusion: Single rooms and alternative lodging were not permitted; Exclusion: Selection is competitive and the school cannot provide individual application feedback; Exclusion: The 2027 eligibility rules are not yet confirmed | Residency: For 2026, both live and attend school in Suffolk, Norfolk, Middlesex, Essex, or Plymouth County, Massachusetts; Boston residents prioritized; Requirement: Enter grade 9, 10, 11, or 12 in the fall after the fellowship; Requirement: Show an active creative-writing practice in any eligible genre and willingness to experiment across genres; Requirement: Attend the full weekday three-week core, daily writing and workshop sessions, Friday open mics, and culminating showcase; Requirement: Give and receive constructive peer feedback and complete the fellowship's writing, performance, conduct, and community requirements; Requirement: Observe the every-other-year limit and maximum of one participation in each grade band; Exclusion: Applicants outside the controlling local residence-and-school counties; Exclusion: Academic essays in place of the required creative-writing sample; Exclusion: Repeat attendance in consecutive years or more than once in the same incoming grade band; Exclusion: Acceptance does not guarantee the stipend without successful completion; Exclusion: The optional anthology week is not a substitute for the core fellowship |
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| Session dates or duration | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Catalog terms: 1 week; 2027: Unconfirmed — check official site | Last year's cycle (2026): Starts July 20, 2026; Ends August 7, 2026; 3–4 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 | 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 | Phoenix, Arizona, ASU Downtown Phoenix campus and Gordon Commons residence hall | Boston, Massachusetts, GrubStreet Center for Creative Writing, 50 Liberty Drive, Suite 500, Boston Seaport |
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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: Applications are reviewed for academic performance and media interest, with current juniors sometimes prioritized because of demand. The 2026 acceptance rate and 2027 capacity are not published on the current page. | Selection: Twenty fellows and a short alternate list were selected in 2026. GrubStreet publishes no applicant count, acceptance rate, scoring rubric, or guaranteed future cohort size. Application materials: Personal statement of no more than 600 words about what the applicant would gain and contribute; Teacher or mentor name and contact information, but no recommendation letter was listed |
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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 2026-08-21Source 2 · checked 2026-08-21 | Source 1 · checked 2026-08-21Source 2 · checked 2026-08-21Source 3 · checked 2026-08-21 |
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