PyPI
Cython
The Cython compiler for writing C extensions in the Python language.
big-dataccppcpythoncpython-extensionscythonperformancepython
github.com/cython/cythoncython.org/Apache-2.0Robert Bradshaw, Stefan Behnel, David Woods +222.1M / week10.9k · 1.6k forks · 614 contributors
Release cadenceEvery 3 weeks
Last releaseNov 1, 2026
Open advisories0
Changelog quality100% curated
CHANGELOG
Release history SecurityYou're on
121 older or filtered releases not shown.
Upgrade guides
Breaking changes and a migration checklist for each major versionCython 0.29 → 30.29.37 → 3.3.1Nov 1, 2026 UnknownCython 0.28 → 0.290.28.6 → 0.29.37Dec 19, 2023 UnknownCython 0.27 → 0.280.27.3 → 0.28.6Nov 1, 2018 UnknownCython 0.26 → 0.270.26.1 → 0.27.3Nov 4, 2017 UnknownCython 0.25 → 0.260.25.2 → 0.26.1Aug 29, 2017 UnknownCython 0.24 → 0.250.24.1 → 0.25.2Dec 8, 2016 UnknownCython 0.23 → 0.240.23.5 → 0.24.1Jul 15, 2016 UnknownCython 0.22 → 0.230.22.1 → 0.23.5Mar 26, 2016 UnknownCython 0.21 → 0.220.21.2 → 0.22.1Jun 20, 2015 UnknownCython 0.20 → 0.210.20.2 → 0.21.2Dec 27, 2014 BreakingBreaking3New20Changed5Fixed29Other1Cython 0.19 → 0.200.19.2 → 0.20.2Jun 17, 2014 UnknownCython 0.18 → 0.190.18 → 0.19.2Oct 13, 2013 UnknownCython 0.17 → 0.180.17.4 → 0.18Jan 28, 2013 UnknownCython 0.16 → 0.170.16 → 0.17.4Jan 3, 2013 UnknownCython 0.15 → 0.160.15.1 → 0.16Apr 21, 2012 UnknownCython 0.14 → 0.150.14.1 → 0.15.1Sep 20, 2011 UnknownCython 0.13 → 0.140.13 → 0.14.1Feb 4, 2011 UnknownCython 0.12 → 0.130.12.1 → 0.13Aug 25, 2010 UnknownCython 0.11 → 0.120.11.3 → 0.12.1Feb 2, 2010 UnknownCython 0.10 → 0.110.10.3 → 0.11.3Sep 27, 2009 UnknownCython 0.9 → 0.100.9.8.1.1 → 0.10.3Dec 17, 2008 Unknown
VersionChannelDateChangesSecurity
3.3.1 StableNov 1, 2026No changes listed3.3.0 StableAug 22, 2026No changes listed3.3.0b1 BetaAug 14, 2026No changes listed3.3.0a1 AlphaJun 24, 2026No changes listed3.2.9 youStableJul 24, 2026No changes listed3.2.8 StableJun 30, 2026No changes listed3.2.6 StableJun 24, 2026No changes listed3.2.5 StableMay 23, 2026No changes listed3.2.4 StableJan 4, 2026No changes listed3.2.3 StableDec 14, 2025No changes listed3.2.2 StableNov 30, 2025No changes listed3.2.1 StableNov 12, 2025No changes listed3.2.0 StableNov 5, 2025No changes listed3.2.0b3 BetaOct 30, 2025No changes listed3.2.0b2 BetaOct 27, 2025No changes listed3.2.0b1 BetaOct 22, 2025No changes listed3.1.8 StableJan 3, 2026No changes listed3.1.7 StableNov 12, 2025No changes listed3.1.6 StableOct 23, 2025No changes listed3.1.5 StableOct 20, 2025No changes listed