Twitter today said it has begun to use artificial intelligence (A.I.) to recommend certain tweets in users' timelines.

The announcement comes a week after billionaire Mark Cuban told CNBC that he had recently begun buying Twitter stock because he believed "they finally got their act together with artificial intelligence."

Facebook, Google, Microsoft, and other companies have previously attempted to improve various products using deep learning, a trendy type of A.I. Twitter has brought on people who are talented in this area through acquisitions of companies such as Magic Pony, and it has open-sourced some of its deep learning software. But the company has not been especially transparent about its progress.

A year ago Twitter introduced a so-called algorithmic timeline that ranked tweets based on relevance instead of them being in reverse chronological order. The feature is on by default, and users can opt out to revert to the classic timeline style. But Twitter has also introduced various widgets near the top of users' reverse-chronological timelines to show off tweets that it thinks users might like or might have missed.