Bastion is over 3 million as they announced around a year back. Transistor so far has not been in any bundles though whereas Bastion has been in four.
As for the platform split, it's a mystery on PSN, but 812,278 ± 20,202 for Steam.
With Transistor having sold more than a million copies now, and Bastion having sold more than three million, we feel incredibly fortunate to be able to stick together as a team and with any luck keep making the kinds of games that resonate with you for a long time to come.
Thanks for the support in here folks. Really means a lot that the game has been so well regarded and (as I wrote in the original post) it mostly just means we get to keep going. To answer a question that's come up in this thread a couple times, Transistor has sold over a million copies, meaning PS Plus downloads are not included in that number since the game was free on PS Plus for the one month. In terms of the number of people who've played (as opposed to purchased) the game, it's much greater, which is cool.