PyPI
pydantic_core
Core functionality for Pydantic validation and serialization
hintsjson-schemaparsingpydanticpythonpython310python311python312
github.com/pydantic/pydanticgithub.com/pydanticMITSamuel Colvin, Adrian Garcia Badaracco, David Montague +3255M / week29.2k · 3.1k forks · 822 contributors
Release cadenceEvery 2 weeks
Last releaseOct 29, 2026
Open advisories0
Changelog quality23% curated
GitHub Releases + CHANGELOG, gaps for some releases
Release history SecurityYou're on
80 older or filtered releases not shown.
Upgrade guides
Breaking changes and a migration checklist for each major versionpydantic_core 0.42 → 20.42.0 → 2.50.2Oct 29, 2026 BreakingBreaking9Security1Platform4Deprecated7New121Changed127Fixed376Other146pydantic_core 0.41 → 0.420.41.0 → 0.42.0Jun 27, 2023 Unknownpydantic_core 0.40 → 0.410.40.1 → 0.41.0Jun 21, 2023 Unknownpydantic_core 0.39 → 0.400.39.0 → 0.40.1Jun 14, 2023 Unknownpydantic_core 0.38 → 0.390.38.0 → 0.39.0Jun 10, 2023 Unknownpydantic_core 0.37 → 0.380.37.0 → 0.38.0May 30, 2023 Unknownpydantic_core 0.36 → 0.370.36.0 → 0.37.0May 28, 2023 Unknownpydantic_core 0.35 → 0.360.35.0 → 0.36.0May 26, 2023 Unknownpydantic_core 0.34 → 0.350.34.0 → 0.35.0May 26, 2023 Unknownpydantic_core 0.33 → 0.340.33.0 → 0.34.0May 25, 2023 Unknownpydantic_core 0.32 → 0.330.32.0 → 0.33.0May 19, 2023 Unknownpydantic_core 0.31 → 0.320.31.0 → 0.32.0May 19, 2023 BreakingBreaking1New2Changed1pydantic_core 0.30 → 0.310.30.0 → 0.31.0May 10, 2023 Unknownpydantic_core 0.29 → 0.300.29.0 → 0.30.0May 5, 2023 Unknownpydantic_core 0.28 → 0.290.28.1 → 0.29.0May 5, 2023 Unknownpydantic_core 0.27 → 0.280.27.1 → 0.28.1May 4, 2023 Unknownpydantic_core 0.26 → 0.270.26.0 → 0.27.1Apr 29, 2023 Unknownpydantic_core 0.25 → 0.260.25.0 → 0.26.0Apr 26, 2023 Unknownpydantic_core 0.24 → 0.250.24.1 → 0.25.0Apr 18, 2023 Review neededNew1Changed1Fixed1pydantic_core 0.23 → 0.240.23.1 → 0.24.1Apr 15, 2023 Unknownpydantic_core 0.22 → 0.230.22.0 → 0.23.1Apr 11, 2023 Unknownpydantic_core 0.21 → 0.220.21.0 → 0.22.0Apr 2, 2023 Unknownpydantic_core 0.20 → 0.210.20.0 → 0.21.0Apr 1, 2023 SafeNew1Fixed1pydantic_core 0.19 → 0.200.19.0 → 0.20.0Mar 31, 2023 Unknownpydantic_core 0.18 → 0.190.18.1 → 0.19.0Mar 30, 2023 Unknownpydantic_core 0.17 → 0.180.17.1 → 0.18.1Mar 29, 2023 Unknownpydantic_core 0.16 → 0.170.16.1 → 0.17.1Mar 27, 2023 Unknownpydantic_core 0.15 → 0.160.15.2 → 0.16.1Mar 21, 2023 Unknownpydantic_core 0.14 → 0.150.14.1 → 0.15.2Mar 18, 2023 Unknownpydantic_core 0.13 → 0.140.13.0 → 0.14.1Mar 17, 2023 Unknownpydantic_core 0.12 → 0.130.12.1 → 0.13.0Mar 16, 2023 Unknownpydantic_core 0.11 → 0.120.11.1 → 0.12.1Mar 16, 2023 Unknownpydantic_core 0.10 → 0.110.10.0 → 0.11.1Mar 7, 2023 Unknownpydantic_core 0.9 → 0.100.9.0 → 0.10.0Feb 23, 2023 Unknownpydantic_core 0.8 → 0.90.8.2 → 0.9.0Feb 10, 2023 Unknownpydantic_core 0.7 → 0.80.7.1 → 0.8.2Feb 2, 2023 Unknownpydantic_core 0.6 → 0.70.6.0 → 0.7.1Nov 7, 2022 Unknownpydantic_core 0.5 → 0.60.5.3 → 0.6.0Oct 27, 2022 Unknownpydantic_core 0.4 → 0.50.4.0 → 0.5.3Oct 20, 2022 Unknownpydantic_core 0.3 → 0.40.3.1 → 0.4.0Oct 13, 2022 Unknownpydantic_core 0.1 → 0.30.1.0 → 0.3.1Sep 30, 2022 Unknownpydantic_core 0.0 → 0.10.0.1 → 0.1.0Aug 3, 2022 SafeNew2
VersionChannelDateChangesSecurity
2.50.2 StableOct 29, 2026No changes listed2.50.1 StableOct 11, 2026No notes published2.50.0 StableOct 8, 2026No notes published2.49.0 youStableSep 9, 2026No notes published2.48.0 StableAug 6, 2026No notes published2.47.0 StableMay 22, 2026No notes published2.46.5 StableAug 28, 2026No notes published2.46.4 StableMay 6, 2026No notes published2.46.3 StableApr 20, 2026No notes published2.46.2 StableApr 17, 2026No notes published2.46.1 StableApr 15, 2026No notes published2.46.0 StableApr 13, 2026No notes published2.45.0 StableMar 31, 2026No notes published2.44.0 YankedMar 27, 2026No notes published2.43.0 YankedMar 27, 2026No notes published2.42.0 StableFeb 23, 2026No notes published2.41.5 StableNov 4, 2025No notes published2.41.4 StableOct 14, 2025No notes published2.41.3 YankedOct 13, 2025No notes published2.41.2 StableOct 13, 2025No notes published