MacRumors published a story that Apple has released the fifth developer betas of iOS 18.1 and iPadOS 18.1 to registered developers.

Apple Seeds Fifth Developer Betas of iOS 18.1 and iPadOS 18.1 With Apple Intelligence

Apple today provided developers with the fourth betas of iOS 18.1 and iPadOS 18.1 to continue testing Apple Intelligence features. The fifth betas come a week after Apple seeded the fourth iOS 18.1 and iPadOS 18.1 betas.

The updates can be downloaded from the Settings app on a compatible device by going to General > Software Update. Note that Apple Intelligence features still an iPhone 15 Pro or iPhone 16 to run.

Apple Seeds Fifth Developer Betas of iOS 18.1 and iPadOS 18.1 With Apple Intelligence