Hydra - 1.2 ~repack~

This moves Hydra away from rigid inheritance trees (which often broke) toward a more flexible composition model. You can now write:

Version 1.2 introduces for certain resolver functions. Early benchmarks show a 40% reduction in instantiation time for large config suites. 5. Deprecation of hydra.main This is the breaking change you need to watch for. The decorator @hydra.main() has been a staple since day one. It now throws a DeprecationWarning . In Hydra 2.0 (planned for Q3 2026), it will be removed. hydra 1.2

April 14, 2026 Category: Developer Tools / MLOps This moves Hydra away from rigid inheritance trees

Navigating the Labyrinth: What’s New in Hydra 1.2 It now throws a DeprecationWarning

Last week, the team released , and it is not just a minor patch—it changes how we think about configuration composition.

This change allows for better type checking and allows you to run Hydra inside Jupyter Notebooks (finally!) without weird hacks. Yes, but carefully. If you are starting a new project today, use Hydra 1.2 . The new composition rules and Jupyter support are worth it.