The present disclosure discloses a joint training method and apparatus for models, a device and a storage medium, and relates to the technical field of artificial intelligence. A specific implementation includes: training a first-party model to be trained using a first sample quantity of first-party training samples to obtain first-party feature gradient information; acquiring second-party feature gradient information and second sample quantity information from a second party, where the second-party feature gradient information is obtained by training, by the second party, a second-party model to be trained using a second sample quantity of second-party training samples; and determining model joint gradient information according to the first-party feature gradient information, the second-party feature gradient information, first sample quantity information and the second sample quantity information, and updating the first-party model and the second-party model according to the model joint gradient information. The embodiments of the present disclosure may determine, according to the gradients and sample quantities of training parties, the model joint gradient information suitable for updating the models of both parties, thereby greatly improving the efficiency of joint training of models.
JOINT TRAINING METHOD AND APPARATUS FOR MODELS, DEVICE AND STORAGE MEDIUM