Speakeasy Ruby SDKs now support Ruby 4.0

Speakeasy has updated its Ruby SDKs to support Ruby 4.0, which was released on December 25, 2025, incorporating new features such as Ruby Box for isolated definition spaces, the experimental ZJIT compiler, and upgrades to core classes like Set and Pathname. The update also includes the removal of deprecated methods and changes to *nil behavior, as well as the elimination of process creation via IO and various standard library modifications. Speakeasy ensures seamless compatibility with these changes, allowing users to maintain focus on their core products without interruption. Users of Speakeasy can easily regenerate their SDKs to incorporate these improvements, while those maintaining SDKs manually are encouraged to use Speakeasy to alleviate concerns about runtime compatibility.