prop=revisions has long ordered revisions by rev_id rather than timestamp when returning results for a single page. In most cases this doesn't make a difference, but for old pages imported from earlier versions of Wikipedia, for revisions imported from Special:Import, and so on these orderings don't always match.

prop=revisions has now been updated[1] to order by timestamp rather than id. While this is technically a breaking change, it seems unlikely that any clients will actually be broken by this.

This should be deployed to WMF wikis with 1.26wmf4, see for the schedule.


Brad Jorsch (Anomie)
Software Engineer
Wikimedia Foundation