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We study KKLT type models with moduli-mixing superpotential. In severalstring models, gauge kinetic functions are written as linear combinations oftwo or more moduli fields. Their gluino condensation generates moduli-mixingsuperpotential. We assume one of moduli fields is frozen already around thestring scale. It is found that K\"ahler modulus can be stabilized at arealistic value without tuning 3-form fluxes because of gluino condensation on(non-)magnetized D-brane. Furthermore, we do not need to highly tune parametersin order to realize a weak gauge coupling and a large hierarchy between thegravitino mass and the Planck scale, when there exists non-perturbative effectson D3-brane. SUSY breaking patterns in our models have a rich structure. Also,some of our models have cosmologically important implications, e.g., on theovershooting problem and the destabilization problem due to finite temperatureeffects as well as the gravitino problem and the moduli problem.Comment: 31 pages, 2 eps figure

Kachru-Kallosh-Linde-Trivedi-type models with moduli-mixing superpotential