California Institute of Technology

Caltech (California Institute of Technology) does not require the GRE (Graduate Record Examination) for most of its graduate programs. However, it's important to note that admission requirements can change over time, and it's always best to verify the most up-to-date information directly from Caltech's official website or by contacting their admissions office. 

While the GRE may not be required, Caltech's graduate programs are highly competitive, and applicants are expected to have a strong academic background, excellent letters of recommendation, a compelling statement of purpose, and relevant research experience. Each programme may have specific requirements and criteria, so it's advisable to review the program-specific admission guidelines provided by Caltech for the programme you are interested in.