diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index e7562934..0c2ecec6 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.19.0"
+  ".": "0.20.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index c6bec7fc..392f60c3 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 49
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/mixedbread%2Fmixedbread-d45a3a3119fa9a3db2a6cae3c6d376f99fb874ed359c369d9b9531fdea55dcec.yml
-openapi_spec_hash: aedb38c67ac4c4b9ee79d130ddeb583a
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/mixedbread%2Fmixedbread-e8f008047e9aa7f8824bbf5c8b3f338ce1f79b4c81f2637a5e4be1530ff45c9f.yml
+openapi_spec_hash: 27f45c14fedc15710f730e037f0694cf
 config_hash: 810d9712d3d0d6a1f50d71a25511d8a7
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e705664b..181f58f3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,25 @@
 # Changelog
 
+## 0.20.0 (2025-07-22)
+
+Full Changelog: [v0.19.0...v0.20.0](https://github.com/mixedbread-ai/mixedbread-python/compare/v0.19.0...v0.20.0)
+
+### Features
+
+* **api:** api update ([b49a79c](https://github.com/mixedbread-ai/mixedbread-python/commit/b49a79cf86930dae1e2f5b2732f7c78fb23d6248))
+* clean up environment call outs ([d0c1c5e](https://github.com/mixedbread-ai/mixedbread-python/commit/d0c1c5e3a871ec7f89a4ec1d0d29e4b4ba97f6e8))
+
+
+### Bug Fixes
+
+* **parsing:** ignore empty metadata ([697e64e](https://github.com/mixedbread-ai/mixedbread-python/commit/697e64e4276c78d19075393ce2d605c401c9026a))
+
+
+### Chores
+
+* **internal:** codegen related update ([b14dd64](https://github.com/mixedbread-ai/mixedbread-python/commit/b14dd6477262cb4611eca7d5a67aaad8f3694088))
+* **types:** rebuild Pydantic models after all types are defined ([1a5b6a5](https://github.com/mixedbread-ai/mixedbread-python/commit/1a5b6a5fd8b9aada359878cdffbb71e6bd888a5d))
+
 ## 0.19.0 (2025-07-17)
 
 Full Changelog: [v0.18.0...v0.19.0](https://github.com/mixedbread-ai/mixedbread-python/compare/v0.18.0...v0.19.0)
diff --git a/README.md b/README.md
index ef53e23e..6b66d10d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Mixedbread API Python SDK API library
 
-[![PyPI version](<https://img.shields.io/pypi/v/mixedbread.svg?label=pypi%20(stable)>)](https://pypi.org/project/mixedbread/)
+<!-- prettier-ignore -->
+[![PyPI version](https://img.shields.io/pypi/v/mixedbread.svg?label=pypi%20(stable))](https://pypi.org/project/mixedbread/)
 
 The Mixedbread API Python SDK library provides convenient access to the Mixedbread REST API from any Python 3.8+
 application. The library includes type definitions for all request params and response fields,
@@ -82,7 +83,6 @@ pip install mixedbread[aiohttp]
 Then you can enable it by instantiating the client with `http_client=DefaultAioHttpClient()`:
 
 ```python
-import os
 import asyncio
 from mixedbread import DefaultAioHttpClient
 from mixedbread import AsyncMixedbread
@@ -90,7 +90,7 @@ from mixedbread import AsyncMixedbread
 
 async def main() -> None:
     async with AsyncMixedbread(
-        api_key=os.environ.get("MXBAI_API_KEY"),  # This is the default and can be omitted
+        api_key="My API Key",
         http_client=DefaultAioHttpClient(),
     ) as client:
         vector_store = await client.vector_stores.create()
diff --git a/pyproject.toml b/pyproject.toml
index 5a7c87c0..0ef339ff 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "mixedbread"
-version = "0.19.0"
+version = "0.20.0"
 description = "The official Python library for the Mixedbread API"
 dynamic = ["readme"]
 license = "Apache-2.0"
@@ -24,6 +24,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Operating System :: OS Independent",
   "Operating System :: POSIX",
   "Operating System :: MacOS",
@@ -38,7 +39,7 @@ Homepage = "https://github.com/mixedbread-ai/mixedbread-python"
 Repository = "https://github.com/mixedbread-ai/mixedbread-python"
 
 [project.optional-dependencies]
-aiohttp = ["aiohttp", "httpx_aiohttp>=0.1.6"]
+aiohttp = ["aiohttp", "httpx_aiohttp>=0.1.8"]
 
 [tool.rye]
 managed = true
diff --git a/requirements-dev.lock b/requirements-dev.lock
index d37564b7..75170ccd 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -48,9 +48,9 @@ filelock==3.12.4
 frozenlist==1.6.2
     # via aiohttp
     # via aiosignal
-h11==0.14.0
+h11==0.16.0
     # via httpcore
-httpcore==1.0.2
+httpcore==1.0.9
     # via httpx
 httpx==0.28.1
     # via httpx-aiohttp
diff --git a/requirements.lock b/requirements.lock
index e7c74727..93fffc81 100644
--- a/requirements.lock
+++ b/requirements.lock
@@ -36,9 +36,9 @@ exceptiongroup==1.2.2
 frozenlist==1.6.2
     # via aiohttp
     # via aiosignal
-h11==0.14.0
+h11==0.16.0
     # via httpcore
-httpcore==1.0.2
+httpcore==1.0.9
     # via httpx
 httpx==0.28.1
     # via httpx-aiohttp
diff --git a/src/mixedbread/_base_client.py b/src/mixedbread/_base_client.py
index 8ec40870..40ee1387 100644
--- a/src/mixedbread/_base_client.py
+++ b/src/mixedbread/_base_client.py
@@ -529,6 +529,15 @@ def _build_request(
             # work around https://github.com/encode/httpx/discussions/2880
             kwargs["extensions"] = {"sni_hostname": prepared_url.host.replace("_", "-")}
 
+        is_body_allowed = options.method.lower() != "get"
+
+        if is_body_allowed:
+            kwargs["json"] = json_data if is_given(json_data) else None
+            kwargs["files"] = files
+        else:
+            headers.pop("Content-Type", None)
+            kwargs.pop("data", None)
+
         # TODO: report this error to httpx
         return self._client.build_request(  # pyright: ignore[reportUnknownMemberType]
             headers=headers,
@@ -540,8 +549,6 @@ def _build_request(
             # so that passing a `TypedDict` doesn't cause an error.
             # https://github.com/microsoft/pyright/issues/3526#event-6715453066
             params=self.qs.stringify(cast(Mapping[str, Any], params)) if params else None,
-            json=json_data if is_given(json_data) else None,
-            files=files,
             **kwargs,
         )
 
diff --git a/src/mixedbread/_models.py b/src/mixedbread/_models.py
index 4f214980..ffcbf67b 100644
--- a/src/mixedbread/_models.py
+++ b/src/mixedbread/_models.py
@@ -2,9 +2,10 @@
 
 import os
 import inspect
-from typing import TYPE_CHECKING, Any, Type, Union, Generic, TypeVar, Callable, cast
+from typing import TYPE_CHECKING, Any, Type, Union, Generic, TypeVar, Callable, Optional, cast
 from datetime import date, datetime
 from typing_extensions import (
+    List,
     Unpack,
     Literal,
     ClassVar,
@@ -366,7 +367,7 @@ def _construct_field(value: object, field: FieldInfo, key: str) -> object:
     if type_ is None:
         raise RuntimeError(f"Unexpected field type is None for {key}")
 
-    return construct_type(value=value, type_=type_)
+    return construct_type(value=value, type_=type_, metadata=getattr(field, "metadata", None))
 
 
 def is_basemodel(type_: type) -> bool:
@@ -420,7 +421,7 @@ def construct_type_unchecked(*, value: object, type_: type[_T]) -> _T:
     return cast(_T, construct_type(value=value, type_=type_))
 
 
-def construct_type(*, value: object, type_: object) -> object:
+def construct_type(*, value: object, type_: object, metadata: Optional[List[Any]] = None) -> object:
     """Loose coercion to the expected type with construction of nested values.
 
     If the given value does not match the expected type then it is returned as-is.
@@ -438,8 +439,10 @@ def construct_type(*, value: object, type_: object) -> object:
         type_ = type_.__value__  # type: ignore[unreachable]
 
     # unwrap `Annotated[T, ...]` -> `T`
-    if is_annotated_type(type_):
-        meta: tuple[Any, ...] = get_args(type_)[1:]
+    if metadata is not None and len(metadata) > 0:
+        meta: tuple[Any, ...] = tuple(metadata)
+    elif is_annotated_type(type_):
+        meta = get_args(type_)[1:]
         type_ = extract_type_arg(type_, 0)
     else:
         meta = tuple()
diff --git a/src/mixedbread/_version.py b/src/mixedbread/_version.py
index 54e58eec..0c912dc1 100644
--- a/src/mixedbread/_version.py
+++ b/src/mixedbread/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "mixedbread"
-__version__ = "0.19.0"  # x-release-please-version
+__version__ = "0.20.0"  # x-release-please-version
diff --git a/src/mixedbread/resources/data_sources/data_sources.py b/src/mixedbread/resources/data_sources/data_sources.py
index dd533886..3579b305 100644
--- a/src/mixedbread/resources/data_sources/data_sources.py
+++ b/src/mixedbread/resources/data_sources/data_sources.py
@@ -3,17 +3,11 @@
 from __future__ import annotations
 
 from typing import Optional
-from typing_extensions import overload
+from typing_extensions import Literal, overload
 
 import httpx
 
-from ...types import (
-    Oauth2Params,
-    DataSourceType,
-    data_source_list_params,
-    data_source_create_params,
-    data_source_update_params,
-)
+from ...types import Oauth2Params, data_source_list_params, data_source_create_params, data_source_update_params
 from ..._types import NOT_GIVEN, Body, Query, Headers, NotGiven
 from ..._utils import required_args, maybe_transform, async_maybe_transform
 from ..._compat import cached_property
@@ -36,7 +30,6 @@
 from ..._base_client import AsyncPaginator, make_request_options
 from ...types.data_source import DataSource
 from ...types.oauth2_params import Oauth2Params
-from ...types.data_source_type import DataSourceType
 from ...types.data_source_delete_response import DataSourceDeleteResponse
 
 __all__ = ["DataSourcesResource", "AsyncDataSourcesResource"]
@@ -70,7 +63,7 @@ def with_streaming_response(self) -> DataSourcesResourceWithStreamingResponse:
     def create(
         self,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["notion"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[data_source_create_params.NotionDataSourceAuthParams] | NotGiven = NOT_GIVEN,
@@ -112,7 +105,7 @@ def create(
     def create(
         self,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["linear"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[Oauth2Params] | NotGiven = NOT_GIVEN,
@@ -153,7 +146,7 @@ def create(
     def create(
         self,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["notion"] | Literal["linear"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[data_source_create_params.NotionDataSourceAuthParams]
@@ -227,7 +220,7 @@ def update(
         self,
         data_source_id: str,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["notion"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[data_source_update_params.NotionDataSourceAuthParams] | NotGiven = NOT_GIVEN,
@@ -274,7 +267,7 @@ def update(
         self,
         data_source_id: str,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["linear"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[Oauth2Params] | NotGiven = NOT_GIVEN,
@@ -320,7 +313,7 @@ def update(
         self,
         data_source_id: str,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["notion"] | Literal["linear"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[data_source_update_params.NotionDataSourceAuthParams]
@@ -477,7 +470,7 @@ def with_streaming_response(self) -> AsyncDataSourcesResourceWithStreamingRespon
     async def create(
         self,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["notion"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[data_source_create_params.NotionDataSourceAuthParams] | NotGiven = NOT_GIVEN,
@@ -519,7 +512,7 @@ async def create(
     async def create(
         self,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["linear"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[Oauth2Params] | NotGiven = NOT_GIVEN,
@@ -560,7 +553,7 @@ async def create(
     async def create(
         self,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["notion"] | Literal["linear"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[data_source_create_params.NotionDataSourceAuthParams]
@@ -634,7 +627,7 @@ async def update(
         self,
         data_source_id: str,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["notion"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[data_source_update_params.NotionDataSourceAuthParams] | NotGiven = NOT_GIVEN,
@@ -681,7 +674,7 @@ async def update(
         self,
         data_source_id: str,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["linear"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[Oauth2Params] | NotGiven = NOT_GIVEN,
@@ -727,7 +720,7 @@ async def update(
         self,
         data_source_id: str,
         *,
-        type: DataSourceType | NotGiven = NOT_GIVEN,
+        type: Literal["notion"] | Literal["linear"] | NotGiven = NOT_GIVEN,
         name: str,
         metadata: object | NotGiven = NOT_GIVEN,
         auth_params: Optional[data_source_update_params.NotionDataSourceAuthParams]
diff --git a/src/mixedbread/types/__init__.py b/src/mixedbread/types/__init__.py
index 5fead10f..aca3e061 100644
--- a/src/mixedbread/types/__init__.py
+++ b/src/mixedbread/types/__init__.py
@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+from . import shared
+from .. import _compat
 from .shared import Usage as Usage, SearchFilter as SearchFilter, SearchFilterCondition as SearchFilterCondition
 from .api_key import APIKey as APIKey
 from .embedding import Embedding as Embedding
@@ -56,3 +58,12 @@
 from .vector_store_question_answering_response import (
     VectorStoreQuestionAnsweringResponse as VectorStoreQuestionAnsweringResponse,
 )
+
+# Rebuild cyclical models only after all modules are imported.
+# This ensures that, when building the deferred (due to cyclical references) model schema,
+# Pydantic can resolve the necessary references.
+# See: https://github.com/pydantic/pydantic/issues/11250 for more context.
+if _compat.PYDANTIC_V2:
+    shared.search_filter.SearchFilter.model_rebuild(_parent_namespace_depth=0)
+else:
+    shared.search_filter.SearchFilter.update_forward_refs()  # type: ignore
diff --git a/src/mixedbread/types/data_source_create_params.py b/src/mixedbread/types/data_source_create_params.py
index caa23d67..9cc9738a 100644
--- a/src/mixedbread/types/data_source_create_params.py
+++ b/src/mixedbread/types/data_source_create_params.py
@@ -6,7 +6,6 @@
 from typing_extensions import Literal, Required, TypeAlias, TypedDict
 
 from .oauth2_params import Oauth2Params
-from .data_source_type import DataSourceType
 
 __all__ = [
     "DataSourceCreateParams",
@@ -18,7 +17,7 @@
 
 
 class NotionDataSource(TypedDict, total=False):
-    type: DataSourceType
+    type: Literal["notion"]
     """The type of data source to create"""
 
     name: Required[str]
@@ -45,7 +44,7 @@ class NotionDataSourceAuthParamsAPIKeyCreateOrUpdateParams(TypedDict, total=Fals
 
 
 class LinearDataSource(TypedDict, total=False):
-    type: DataSourceType
+    type: Literal["linear"]
     """The type of data source to create"""
 
     name: Required[str]
diff --git a/src/mixedbread/types/data_source_update_params.py b/src/mixedbread/types/data_source_update_params.py
index 6c283f81..9aa8872b 100644
--- a/src/mixedbread/types/data_source_update_params.py
+++ b/src/mixedbread/types/data_source_update_params.py
@@ -6,7 +6,6 @@
 from typing_extensions import Literal, Required, TypeAlias, TypedDict
 
 from .oauth2_params import Oauth2Params
-from .data_source_type import DataSourceType
 
 __all__ = [
     "DataSourceUpdateParams",
@@ -18,7 +17,7 @@
 
 
 class NotionDataSource(TypedDict, total=False):
-    type: DataSourceType
+    type: Literal["notion"]
     """The type of data source to create"""
 
     name: Required[str]
@@ -45,7 +44,7 @@ class NotionDataSourceAuthParamsAPIKeyCreateOrUpdateParams(TypedDict, total=Fals
 
 
 class LinearDataSource(TypedDict, total=False):
-    type: DataSourceType
+    type: Literal["linear"]
     """The type of data source to create"""
 
     name: Required[str]
diff --git a/src/mixedbread/types/linear_data_source_param.py b/src/mixedbread/types/linear_data_source_param.py
index 9dbe8904..8956d2e3 100644
--- a/src/mixedbread/types/linear_data_source_param.py
+++ b/src/mixedbread/types/linear_data_source_param.py
@@ -3,16 +3,15 @@
 from __future__ import annotations
 
 from typing import Optional
-from typing_extensions import Required, TypedDict
+from typing_extensions import Literal, Required, TypedDict
 
 from .oauth2_params import Oauth2Params
-from .data_source_type import DataSourceType
 
 __all__ = ["LinearDataSourceParam"]
 
 
 class LinearDataSourceParam(TypedDict, total=False):
-    type: DataSourceType
+    type: Literal["linear"]
     """The type of data source to create"""
 
     name: Required[str]
diff --git a/src/mixedbread/types/notion_data_source_param.py b/src/mixedbread/types/notion_data_source_param.py
index 914c502f..65d12b2e 100644
--- a/src/mixedbread/types/notion_data_source_param.py
+++ b/src/mixedbread/types/notion_data_source_param.py
@@ -6,7 +6,6 @@
 from typing_extensions import Literal, Required, TypeAlias, TypedDict
 
 from .oauth2_params import Oauth2Params
-from .data_source_type import DataSourceType
 
 __all__ = ["NotionDataSourceParam", "AuthParams", "AuthParamsAPIKeyCreateOrUpdateParams"]
 
@@ -22,7 +21,7 @@ class AuthParamsAPIKeyCreateOrUpdateParams(TypedDict, total=False):
 
 
 class NotionDataSourceParam(TypedDict, total=False):
-    type: DataSourceType
+    type: Literal["notion"]
     """The type of data source to create"""
 
     name: Required[str]
diff --git a/src/mixedbread/types/shared/search_filter.py b/src/mixedbread/types/shared/search_filter.py
index 4835d18d..579ae162 100644
--- a/src/mixedbread/types/shared/search_filter.py
+++ b/src/mixedbread/types/shared/search_filter.py
@@ -36,9 +36,3 @@ class SearchFilter(BaseModel):
 
     none: Optional[List[NoneType]] = None
     """List of conditions or filters to be NOTed"""
-
-
-if PYDANTIC_V2:
-    SearchFilter.model_rebuild()
-else:
-    SearchFilter.update_forward_refs()  # type: ignore
diff --git a/tests/api_resources/test_data_sources.py b/tests/api_resources/test_data_sources.py
index 7ecf2ff1..5cb9991e 100644
--- a/tests/api_resources/test_data_sources.py
+++ b/tests/api_resources/test_data_sources.py
@@ -72,7 +72,7 @@ def test_method_create_overload_2(self, client: Mixedbread) -> None:
     @parametrize
     def test_method_create_with_all_params_overload_2(self, client: Mixedbread) -> None:
         data_source = client.data_sources.create(
-            type="notion",
+            type="linear",
             name="name",
             metadata={},
             auth_params={"type": "oauth2"},
@@ -206,7 +206,7 @@ def test_method_update_overload_2(self, client: Mixedbread) -> None:
     def test_method_update_with_all_params_overload_2(self, client: Mixedbread) -> None:
         data_source = client.data_sources.update(
             data_source_id="182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
-            type="notion",
+            type="linear",
             name="name",
             metadata={},
             auth_params={"type": "oauth2"},
@@ -377,7 +377,7 @@ async def test_method_create_overload_2(self, async_client: AsyncMixedbread) ->
     @parametrize
     async def test_method_create_with_all_params_overload_2(self, async_client: AsyncMixedbread) -> None:
         data_source = await async_client.data_sources.create(
-            type="notion",
+            type="linear",
             name="name",
             metadata={},
             auth_params={"type": "oauth2"},
@@ -511,7 +511,7 @@ async def test_method_update_overload_2(self, async_client: AsyncMixedbread) ->
     async def test_method_update_with_all_params_overload_2(self, async_client: AsyncMixedbread) -> None:
         data_source = await async_client.data_sources.update(
             data_source_id="182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
-            type="notion",
+            type="linear",
             name="name",
             metadata={},
             auth_params={"type": "oauth2"},
diff --git a/tests/test_client.py b/tests/test_client.py
index 8f60c0c0..81aac0d0 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -464,7 +464,7 @@ def test_request_extra_query(self) -> None:
     def test_multipart_repeating_array(self, client: Mixedbread) -> None:
         request = client._build_request(
             FinalRequestOptions.construct(
-                method="get",
+                method="post",
                 url="/foo",
                 headers={"Content-Type": "multipart/form-data; boundary=6b7ba517decee4a450543ea6ae821c82"},
                 json_data={"array": ["foo", "bar"]},
@@ -1283,7 +1283,7 @@ def test_request_extra_query(self) -> None:
     def test_multipart_repeating_array(self, async_client: AsyncMixedbread) -> None:
         request = async_client._build_request(
             FinalRequestOptions.construct(
-                method="get",
+                method="post",
                 url="/foo",
                 headers={"Content-Type": "multipart/form-data; boundary=6b7ba517decee4a450543ea6ae821c82"},
                 json_data={"array": ["foo", "bar"]},
diff --git a/tests/test_models.py b/tests/test_models.py
index 7f19dc8b..27250fa2 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -889,3 +889,48 @@ class ModelB(BaseModel):
     )
 
     assert isinstance(m, ModelB)
+
+
+def test_nested_discriminated_union() -> None:
+    class InnerType1(BaseModel):
+        type: Literal["type_1"]
+
+    class InnerModel(BaseModel):
+        inner_value: str
+
+    class InnerType2(BaseModel):
+        type: Literal["type_2"]
+        some_inner_model: InnerModel
+
+    class Type1(BaseModel):
+        base_type: Literal["base_type_1"]
+        value: Annotated[
+            Union[
+                InnerType1,
+                InnerType2,
+            ],
+            PropertyInfo(discriminator="type"),
+        ]
+
+    class Type2(BaseModel):
+        base_type: Literal["base_type_2"]
+
+    T = Annotated[
+        Union[
+            Type1,
+            Type2,
+        ],
+        PropertyInfo(discriminator="base_type"),
+    ]
+
+    model = construct_type(
+        type_=T,
+        value={
+            "base_type": "base_type_1",
+            "value": {
+                "type": "type_2",
+            },
+        },
+    )
+    assert isinstance(model, Type1)
+    assert isinstance(model.value, InnerType2)