1. A text prediction system, comprising: one or more processors; memory storing instructions that, when executed by the one or more processors, cause the one or more processors to: generate at least one first sequence prediction based on a first evidence source and a first model, wherein each of the at least one first sequence prediction comprises a first sequence and a first associated probability estimate; generate at least one second sequence prediction based on a second evidence source and a second model, wherein each of the at least one second sequence prediction comprises a second sequence and a second associated probability estimate; wherein the first associated probability estimate or the second associated probability estimate is weighted according to a probability that the first model or the second model comprises a given context sequence; and combine the at least one first sequence prediction and the at least one second sequence prediction into at least one combined sequence prediction based at least in part on the first associated probability estimate and the second associated probability estimate; and a display coupled to at least one of the one or more processors or the memory, wherein the display is configured to: output the at least one combined sequence prediction within a text entry graphical user interface.