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.score() with array API does not follow same 'everything follows X' logic as .fit()

Bug

Needs TriageIssue requires triageIssue requires triage

Status: Open.

#33822 In scikit-learn/scikit-learn;

· david-cortes-intel opened on Apr 21, 2026

ENH: Add confusion_matrix_diff to compare multiple models against a baseline

Closing candidateindicating we might close this one soon / at a later reviewindicating we might close this one soon / at a later review

Needs Info

New Feature

Status: Open.

#33800 In scikit-learn/scikit-learn;

· Harguna opened on Apr 19, 2026

Optimized _class_means in sklearn/discriminant_analysis.py

module:discriminant_analysis

Needs BenchmarksA tag for the issues and PRs which require some benchmarksA tag for the issues and PRs which require some benchmarks

Performance

Status: Open.

#33793 In scikit-learn/scikit-learn;

· grahamonica opened on Apr 19, 2026

[Callbacks] Add mechanism to realiably re-set max_subtasks on CallbackContext?

Callbacks

Status: Open.

#33783 In scikit-learn/scikit-learn;

· StefanieSenger opened on Apr 17, 2026

Support for building against a SciPy which uses ILP64 BLAS and cython_blas

Build / CI

Status: Open.

#33775 In scikit-learn/scikit-learn;

· rgommers opened on Apr 16, 2026

BUG HTML Display not showing output features for CountVectorizer

Bug

Status: Open.

#33772 In scikit-learn/scikit-learn;

· DeaMariaLeon opened on Apr 16, 2026

Wide HTML repr doesn't render well on firefox

frontend

Status: Open.

#33758 In scikit-learn/scikit-learn;

· jeremiedbb opened on Apr 15, 2026

[BUG] BayesianRidge.predict with return_std=True fails to center test features, leading to incorrect predictive variance

Bug

Needs TriageIssue requires triageIssue requires triage

Status: Open.

#33757 In scikit-learn/scikit-learn;

· danilo-silva-ufsc opened on Apr 15, 2026

DOC: Improve formula explanation and add table for train/test sizes in TimeSeriesSplit

Closing candidateindicating we might close this one soon / at a later reviewindicating we might close this one soon / at a later review

Documentation

Status: Open.

#33741 In scikit-learn/scikit-learn;

· anikchand461 opened on Apr 14, 2026

Add MoveTo transformer to move X to a different array namespace/device

Array API

Needs DecisionRequires decisionRequires decision

Status: Open.

#33737 In scikit-learn/scikit-learn;

· betatim opened on Apr 13, 2026

Use clang-cl (LLVM) compiler for Windows ARM64 wheel builds

Build / CI

Needs InvestigationIssue requires investigationIssue requires investigation

Status: Open.

#33715 In scikit-learn/scikit-learn;

· priyadharshni-mcw opened on Apr 9, 2026

Add replaced_undefined_by in classification metrics

API

Enhancement

Meta-issueGeneral issue associated to an identified list of tasksGeneral issue associated to an identified list of tasks

Status: Open.

#33712 In scikit-learn/scikit-learn;

· jeremiedbb opened on Apr 8, 2026

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1.9