The first single from album Amok, released as a digital download on 10 Sep 2012, and on 12' vinyl on 4 Dec 2012.
It was the first non-remixed track released by the band.
While scheduled for release on 10 Sep 2012, Default was made available for sale on iTunes on 6 Sep 2012. At this point, Thom announced on the Radiohead website details of the song's release, saying:
'The first tune we'd like you to hear is Default. A 12' vinyl version will follow next month and an album will eventually follow that next year.'
On 26 Sep 2012, details of the vinyl release were announced, stating that the track 'What the Eyeballs Did' would serve as the single's B-side.