Isotonic Regression Python Packages

calibre

Advanced Calibration Models

probcal

Universal post-hoc probability calibration for binary classifiers: methods, metrics, diagnostics, and auditable offsetting — numpy-only.

ucci-router

UCCI: calibrated cascade routing for LLMs. Reference implementation of arXiv:2605.18796 (Python, CLI, Rust).

streamcal

Streaming isotonic probability calibration with compact per-bin state and forgetting

rank-preserving-calibration

Rank preserving calibration of multiclass prob.

ppi-aipw

Python and R package for semisupervised mean estimation and causal inference with AIPW, calibration, and practical uncertainty quantification.