[edraferi]

It's gonna be hard to get an "off the shelf" model for text prediction, because the upcoming text depends on the author, topic, and other context. You can probably find some decent pre-trained models to get started, but you'll need to customize them for your application to get good results.

[mkl]

Right, I was thinking off-the-shelf in the sense of giving it a tokenised corpus and it does the rest, or it incorporates that into its existing model. Dictation software, phone keyboards, etc. do this.