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scikit-learn

What changed in scikit-learn 1, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-27.

1 breaking1 behavior and defaults2 fixes and other

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scikit-learn 14 changes

Breaking changes 1

  • scikit-learn 1.8.0 supports Python versions 3.11 to 3.14.

    1.8.0release notes

Behavior and default changes 1

  • scikit-learn 1.8.0 adds support for free-threaded CPython.

    1.8.0release notes

Fixes and other changes 2

  • This is the first scikit-learn release supporting Python 3.15.

    1.9.1release notes

  • This version supports Python 3.11 to 3.14.

    1.9.0release notes