[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.11.0b1)
What's Changed
Packaging
* Add a `check_pydantic_core_version()` function by Viicos in https://github.com/pydantic/pydantic/pull/11324
* Remove `greenlet` development dependency by Viicos in https://github.com/pydantic/pydantic/pull/11351
* Use the `typing-inspection` library by Viicos in https://github.com/pydantic/pydantic/pull/11479
* Bump `pydantic-core` to `v2.31.1` by sydney-runkle in https://github.com/pydantic/pydantic/pull/11526
New Features
* Support unsubstituted type variables with both a default and a bound or constraints by FyZzyss in https://github.com/pydantic/pydantic/pull/10789
* Add a `default_factory_takes_validated_data` property to `FieldInfo` by Viicos in https://github.com/pydantic/pydantic/pull/11034
* Raise a better error when a generic alias is used inside `type[]` by Viicos in https://github.com/pydantic/pydantic/pull/11088
* Properly support PEP 695 generics syntax by Viicos in https://github.com/pydantic/pydantic/pull/11189
* Properly support type variable defaults by Viicos in https://github.com/pydantic/pydantic/pull/11332
* Add support for validating v6, v7, v8 UUIDs by astei in https://github.com/pydantic/pydantic/pull/11436
* Improve alias configuration APIs by sydney-runkle in https://github.com/pydantic/pydantic/pull/11468
Changes
* Rework `create_model` field definitions format by Viicos in https://github.com/pydantic/pydantic/pull/11032
* Raise a deprecation warning when a field is annotated as final with a default value by Viicos in https://github.com/pydantic/pydantic/pull/11168
* Deprecate accessing `model_fields` and `model_computed_fields` on instances by Viicos in https://github.com/pydantic/pydantic/pull/11169
* **Breaking Change:** Move core schema generation logic for path types inside the `GenerateSchema` class by sydney-runkle in https://github.com/pydantic/pydantic/pull/10846
* Remove Python 3.8 Support by sydney-runkle in https://github.com/pydantic/pydantic/pull/11258
* Optimize calls to `get_type_ref` by Viicos in https://github.com/pydantic/pydantic/pull/10863
* Disable `pydantic-core` core schema validation by sydney-runkle in https://github.com/pydantic/pydantic/pull/11271
Performance
* Only evaluate `FieldInfo` annotations if required during schema building by Viicos in https://github.com/pydantic/pydantic/pull/10769
* Improve `__setattr__` performance of Pydantic models by caching setter functions by MarkusSintonen in https://github.com/pydantic/pydantic/pull/10868
* Improve annotation application performance by Viicos in https://github.com/pydantic/pydantic/pull/11186
* Improve performance of `_typing_extra` module by Viicos in https://github.com/pydantic/pydantic/pull/11255
* Refactor and optimize schema cleaning logic by Viicos in https://github.com/pydantic/pydantic/pull/11244
* Create a single dictionary when creating a `CoreConfig` instance by sydney-runkle in https://github.com/pydantic/pydantic/pull/11384
* Bump `pydantic-core` and thus use `SchemaValidator` and `SchemaSerializer` caching by sydney-runkle in https://github.com/pydantic/pydantic/pull/11402
* Reuse cached core schemas for parametrized generic Pydantic models by MarkusSintonen in https://github.com/pydantic/pydantic/pull/11434
Fixes
* Improve `TypeAdapter` instance repr by sydney-runkle in https://github.com/pydantic/pydantic/pull/10872
* Use the correct frame when instantiating a parametrized `TypeAdapter` by Viicos in https://github.com/pydantic/pydantic/pull/10893
* Infer final fields with a default value as class variables in the mypy plugin by Viicos in https://github.com/pydantic/pydantic/pull/11121
* Recursively unpack `Literal` values if using PEP 695 type aliases by Viicos in https://github.com/pydantic/pydantic/pull/11114
* Override `__subclasscheck__` on `ModelMetaclass` to avoid memory leak and performance issues by Viicos in https://github.com/pydantic/pydantic/pull/11116
* Remove unused `_extract_get_pydantic_json_schema()` parameter by Viicos in https://github.com/pydantic/pydantic/pull/11155
* Improve discriminated union error message for invalid union variants by Viicos in https://github.com/pydantic/pydantic/pull/11161
* Unpack PEP 695 type aliases if using the `Annotated` form by Viicos in https://github.com/pydantic/pydantic/pull/11109
* Add missing stacklevel in `deprecated_instance_property` warning by Viicos in https://github.com/pydantic/pydantic/pull/11200
* Copy `WithJsonSchema` schema to avoid sharing mutated data by thejcannon in https://github.com/pydantic/pydantic/pull/11014
* Do not cache parametrized models when in the process of parametrizing another model by Viicos in https://github.com/pydantic/pydantic/pull/10704
* Add discriminated union related metadata entries to the `CoreMetadata` definition by Viicos in https://github.com/pydantic/pydantic/pull/11216
* Consolidate schema definitions logic in the `_Definitions` class by Viicos in https://github.com/pydantic/pydantic/pull/11208
* Support initializing root model fields with values of the `root` type in the mypy plugin by Viicos in https://github.com/pydantic/pydantic/pull/11212
* Fix various issues with dataclasses and `use_attribute_docstrings` by Viicos in https://github.com/pydantic/pydantic/pull/11246
* Only compute normalized decimal places if necessary in `decimal_places_validator` by misrasaurabh1 in https://github.com/pydantic/pydantic/pull/11281
* Add support for `validation_alias` in the mypy plugin by Viicos in https://github.com/pydantic/pydantic/pull/11295
* Fix JSON Schema reference collection with `"examples"` keys by Viicos in https://github.com/pydantic/pydantic/pull/11305
* Do not transform model serializer functions as class methods in the mypy plugin by Viicos in https://github.com/pydantic/pydantic/pull/11298
* Simplify `GenerateJsonSchema.literal_schema()` implementation by misrasaurabh1 in https://github.com/pydantic/pydantic/pull/11321
* Add additional allowed schemes for `ClickHouseDsn` by Maze21127 in https://github.com/pydantic/pydantic/pull/11319
* Coerce decimal constraints to `Decimal` instances by Viicos in https://github.com/pydantic/pydantic/pull/11350
* Use the correct JSON Schema mode when handling function schemas by Viicos in https://github.com/pydantic/pydantic/pull/11367
* Improve exception message when encountering recursion errors during type evaluation by Viicos in https://github.com/pydantic/pydantic/pull/11356
* Always include `additionalProperties: True` for arbitrary dictionary schemas by austinyu in https://github.com/pydantic/pydantic/pull/11392
* Expose `fallback` parameter in serialization methods by Viicos in https://github.com/pydantic/pydantic/pull/11398
* Fix path serialization behavior by sydney-runkle in https://github.com/pydantic/pydantic/pull/11416
* Do not reuse validators and serializers during model rebuild by Viicos in https://github.com/pydantic/pydantic/pull/11429
* Collect model fields when rebuilding a model by Viicos in https://github.com/pydantic/pydantic/pull/11388
* Allow cached properties to be altered on frozen models by Viicos in https://github.com/pydantic/pydantic/pull/11432
* Fix tuple serialization for `Sequence` types by sydney-runkle in https://github.com/pydantic/pydantic/pull/11435
* Fix: do not check for `__get_validators__` on classes where `__get_pydantic_core_schema__` is also defined by tlambert03 in https://github.com/pydantic/pydantic/pull/11444
* Allow callable instances to be used as serializers by Viicos in https://github.com/pydantic/pydantic/pull/11451
* Improve error thrown when overriding field with a property by sydney-runkle in https://github.com/pydantic/pydantic/pull/11459
* Fix JSON Schema generation with referenceable core schemas holding JSON metadata by Viicos in https://github.com/pydantic/pydantic/pull/11475
* Support strict specification on union member types by sydney-runkle in https://github.com/pydantic/pydantic/pull/11481
* Implicitly set `validate_by_name` to `True` when `validate_by_alias` is `False` by sydney-runkle in https://github.com/pydantic/pydantic/pull/11503
* Change type of `Any` when synthesizing `BaseSettings.__init__` signature in the mypy plugin by Viicos in https://github.com/pydantic/pydantic/pull/11497
* Support type variable defaults referencing other type variables by Viicos in https://github.com/pydantic/pydantic/pull/11520
* Fix `ValueError` on year zero by davidhewitt in https://github.com/pydantic/pydantic-core/pull/1583
* `dataclass` `InitVar` shouldn't be required on serialization by sydney-runkle in https://github.com/pydantic/pydantic-core/pull/1602
New Contributors
* FyZzyss made their first contribution in https://github.com/pydantic/pydantic/pull/10789
* tamird made their first contribution in https://github.com/pydantic/pydantic/pull/10948
* felixxm made their first contribution in https://github.com/pydantic/pydantic/pull/11077
* alexprabhat99 made their first contribution in https://github.com/pydantic/pydantic/pull/11082
* Kharianne made their first contribution in https://github.com/pydantic/pydantic/pull/11111
* mdaffad made their first contribution in https://github.com/pydantic/pydantic/pull/11177
* thejcannon made their first contribution in https://github.com/pydantic/pydantic/pull/11014
* thomasfrimannkoren made their first contribution in https://github.com/pydantic/pydantic/pull/11251
* usernameMAI made their first contribution in https://github.com/pydantic/pydantic/pull/11275
* ananiavito made their first contribution in https://github.com/pydantic/pydantic/pull/11302
* pawamoy made their first contribution in https://github.com/pydantic/pydantic/pull/11311
* Maze21127 made their first contribution in https://github.com/pydantic/pydantic/pull/11319
* kauabh made their first contribution in https://github.com/pydantic/pydantic/pull/11369
* jaceklaskowski made their first contribution in https://github.com/pydantic/pydantic/pull/11353
* tmpbeing made their first contribution in https://github.com/pydantic/pydantic/pull/11375
* petyosi made their first contribution in https://github.com/pydantic/pydantic/pull/11405
* austinyu made their first contribution in https://github.com/pydantic/pydantic/pull/11392
* mikeedjones made their first contribution in https://github.com/pydantic/pydantic/pull/11402
* astei made their first contribution in https://github.com/pydantic/pydantic/pull/11436
* dsayling made their first contribution in https://github.com/pydantic/pydantic/pull/11522
* sobolevn made their first contribution in https://github.com/pydantic/pydantic-core/pull/1645