Model 1 may refer to:
Austin Model 1, a semi-empirical method for the quantum calculation of molecular electronic structure in computational chemistry Boeing Model 1, a United States single-engine biplane seaplane aircraft Breese-Dallas Model 1, a prototype single engine airliner that rapidly changed hands throughout the 1930s Fleet Model 1, a biplane from 1928 JSP model 1 architecture, a design pattern used in the design of Java Web applications Sega Model 1, an arcade system board released by Sega in 1992 Smith & Wesson Model 1, an American revolver produced from 1857 through 1882
See also M1 (disambiguation) System 1 (disambiguation) Type 1 (disambiguation)