Sourced from pydantic's releases.

v2.12.1 2025-10-13

v2.12.1 (2025-10-13)

GitHub release

What's Changed

This is the first 2.12 patch release, addressing most (but not all yet) regressions from the initial 2.12.0 release.

Fixes

• Do not evaluate annotations when inspecting validators and serializers by @​Viicos in #12355
• Make sure None is converted as NoneType in Python 3.14 by @​Viicos in #12370
• Backport V1 runtime warning when using Python 3.14 by @​Viicos in #12367
• Fix error message for invalid validator signatures by @​Viicos in #12366
• Populate field name in ValidationInfo for validation of default value by @​Viicos in pydantic-core#1826
• Encode credentials in MultiHostUrl builder by @​willswire in pydantic-core#1829
• Respect field serializers when using serialize_as_any serialization flag by @​davidhewitt in pydantic-core#1829
• Fix various RootModel serialization issues by @​davidhewitt in pydantic-core#1836

New Contributors

• @​willswire made their first contribution in pydantic-core#1829

Full Changelog: https://github.com/pydantic/pydantic/compare/v2.12.0...v2.12.1

v2.12.0 2025-10-07

v2.12.0 (2025-10-07)

[!NOTE] Check out the blog post for release highlights. Several minor changes (considered non-breaking changes according to our versioning policy) are also included in this release. Make sure to look into them before upgrading.

[!WARNING] The core functionality of Pydantic V1 is not compatible with Python 3.14 or greater.

This is the final 2.12 release. It features the work of 20 external contributors and provides useful new features, along with initial Python 3.14 support.

Changelog (see the 2.12.0a1 and 2.12.0b1 releases for additional changes since 2.11):

Packaging

• Update V1 copy to v1.10.24 by @​Viicos in #12338

New Features

... (truncated)

Sourced from pydantic's changelog.

v2.12.1 (2025-10-13)

GitHub release

What's Changed

This is the first 2.12 patch release, addressing most (but not all yet) regressions from the initial 2.12.0 release.

Fixes

• Do not evaluate annotations when inspecting validators and serializers by @​Viicos in #12355
• Make sure None is converted as NoneType in Python 3.14 by @​Viicos in #12370
• Backport V1 runtime warning when using Python 3.14 by @​Viicos in #12367
• Fix error message for invalid validator signatures by @​Viicos in #12366
• Populate field name in ValidationInfo for validation of default value by @​Viicos in pydantic-core#1826
• Encode credentials in MultiHostUrl builder by @​willswire in pydantic-core#1829
• Respect field serializers when using serialize_as_any serialization flag by @​davidhewitt in pydantic-core#1829
• Fix various RootModel serialization issues by @​davidhewitt in pydantic-core#1836

New Contributors

• @​willswire made their first contribution in pydantic-core#1829

v2.12.0 (2025-10-07)

GitHub release

What's Changed

This is the final 2.12 release. It features the work of 20 external contributors and provides useful new features, along with initial Python 3.14 support. Several minor changes (considered non-breaking changes according to our versioning policy) are also included in this release. Make sure to look into them before upgrading.

Note that Pydantic V1 is not compatible with Python 3.14 and greater.

Changes (see the alpha and beta releases for additional changes since 2.11):

Packaging

• Update V1 copy to v1.10.24 by @​Viicos in #12338

New Features

• Add extra parameter to the validate functions by @​anvilpete in #12233
• Add exclude_computed_fields serialization option by @​Viicos in #12334
• Add preverse_empty_path URL options by @​Viicos in #12336
• Add union_format parameter to JSON Schema generation by @​Viicos in #12147
• Add __qualname__ parameter for create_model by @​Atry in #12001

Fixes

... (truncated)

• b4076c6 Prepare release 2.12.1
• b67f072 Bump pydantic-core to v2.41.3
• 529f7dd Fix error message for invalid validator signatures
• 445fa79 Backport V1 runtime warning
• b3dba9b Make sure None is converted as NoneType in Python 3.14
• 1e8c41e Do not evaluate annotations when inspecting validators and serializers
• e2a199f Upgrade dependencies for 3.14
• 79353e6 Fix spelling in model_dump() docstring
• aa6b6cd Fix typo in experimental.md documentation
• a7928e6 Update Python version in documentation publishing CI job (#12344)
• Additional commits viewable in compare view

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