Transformers v5 release notes Highlights Significant API changes: dynamic weight loading, tokenization Backwards Incompatible Changes Bugfixes and improvements We have a migration guide that will be continuously updated available on the `main` branch, please check it out in case you're facing issues: migration guide. Highlights We are excited to announce the initial release of Transformers v5. This is the first major release in five years, and the release is significant: 1200 commits have been pushed to `main` since the latest minor release. This release removes a lot of long-due deprecations, introduces several refactors that significantly simplify our APIs and internals, and comes with a large number of bug fixes.

We give an overview of our focus for this release in the following blogpost. In these release notes, we'll focus directly on the refactors and new APIs coming with v5. This release is the full V5 release. It sets in motion something bigger: going forward, starting with v5, we'll now release minor releases every week, rather than every 5 weeks. Expect v5.1 to follow next week, then v5.2 the week that follows, etc. We're moving forward with this change to ensure you…