Apple Intelligence arrived on compatible iPhones, iPads, and Macs via a staggered rollout. There were new features launched in both iOS 18.1 and iOS 18.2. Now, we know exactly how much those additional features are costing in terms of iPhone storage space.Apple Intelligence now requires 7GB of free storage per deviceWhen the first wave of Apple Intelligence features arrived in iOS 18.1, Apple published a variety of requirements for use.Among those requirements was 4GB of available iPhone storage space.This made sense, because one of the privacy features of Apple Intelligence is that most of its features run on-device by default. And in order to do that, your device needs to download the AI modelswhich eats into your storage space.We always knew that the 4GB requirement would increase over time, as more AI features debuted.But now we know that its already almost doubled following iOS 18.2s release.Per Apples website, Apple Intelligence now requires 7GB of free storage.The same 7GB number applies whether youre using an iPhone, iPad, or Mac.But it also, since each product does its own on-device processing, adds up for multi-device use.If you want to use AI features across all three devices (which Id assume most of us do), thats a grand total of 21GB of free space being used by Apple Intelligence.And unfortunately, if youre tight on storage, theres no way to reduce the requirement by disabling certain features.Why the requirement increased, and what to expect in the futureiOS 18.2 introduced big new AI features, including:Scanning this list, I understand why the storage requirement had to increase. But as more Apple Intelligence features continue arriving, on-device storage is going to become more in-demand than ever before.Looking ahead, Apple so far doesnt appear to be adding new AI features to iOS 18.3but new betas could change that.In Aprils iOS 18.4 release though, some big Siri changes are coming. Siri upgrades will undoubtedly bump the 7GB requirement even higher. We could be looking at 10GB requirements per device in just the next few months, before any of iOS 19s new features debut.Big takeaway? It may be time to start upgrading the standard storage tier you opt for with your next iPhone, iPad, or Mac purchase.Are you concerned about Apple Intelligence storage requirements? Let us know in the comments.Best iPhone accessoriesAdd 9to5Mac to your Google News feed. FTC: We use income earning auto affiliate links. More.Youre reading 9to5Mac experts who break news about Apple and its surrounding ecosystem, day after day. Be sure to check out our homepage for all the latest news, and follow 9to5Mac on Twitter, Facebook, and LinkedIn to stay in the loop. Dont know where to start? Check out our exclusive stories, reviews, how-tos, and subscribe to our YouTube channel