Swift 6.4 Released

Docs Community Packages Blog Install (6.4.0) Docs Community Packages Blog Install (6.4.0) Swift 6.4 Released Joe Heck Holly Borla September 15, 2026 Swift 6.4 is now available. Swift aims to be a great choice across the stack, from apps and servers to systems code, embedded devices, and the browser. This release deepens that support, and makes everyday code easier to write. Highlights include:

There’s so much more. Read on for a detailed guide to the new changes, or see the Swift Evolution dashboard for the full list of proposals in Swift 6.4.

Swift 6.4 streamlines your day-to-day programming to make your code simpler and clearer.

You can combine asynchronous calls in defer blocks and cancellation shields to make sure that cleanup work always happens, no matter how the function returns: