Sourced from pydantic's releases.

v2.12.5 2025-11-26

v2.12.5 (2025-11-26)

This is the fifth 2.12 patch release, addressing an issue with the MISSING sentinel and providing several documentation improvements.

The next 2.13 minor release will be published in a couple weeks, and will include a new polymorphic serialization feature addressing the remaining unexpected changes to the serialize as any behavior.

• Fix pickle error when using model_construct() on a model with MISSING as a default value by @​ornariece in #12522.
• Several updates to the documentation by @​Viicos.

Full Changelog: https://github.com/pydantic/pydantic/compare/v2.12.4...v2.12.5

Sourced from pydantic's changelog.

v2.12.5 (2025-11-26)

GitHub release

This is the fifth 2.12 patch release, addressing an issue with the MISSING sentinel and providing several documentation improvements.

The next 2.13 minor release will be published in a couple weeks, and will include a new polymorphic serialization feature addressing the remaining unexpected changes to the serialize as any behavior.

• Fix pickle error when using model_construct() on a model with MISSING as a default value by @​ornariece in #12522.
• Several updates to the documentation by @​Viicos.

• bd2d0dd Prepare release v2.12.5
• 7d0302e Document security implications when using create_model()
• e9ef980 Fix typo in Standard Library Types documentation
• f2c20c0 Add pydantic-docs dev dependency, make use of versioning blocks
• a76c1aa Update documentation about JSON Schema
• 8cbc72c Add documentation about custom __init__()
• 99eba59 Add additional test for FieldInfo.get_default()
• c710769 Special case MISSING sentinel in smart_deepcopy()
• 20a9d77 Do not delete mock validator/serializer in rebuild_dataclass()
• c86515a Update parts of the model and revalidate_instances documentation
• See full diff in compare view

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