diff --git a/pyproject.toml b/pyproject.toml
index fbc9c34a..5bd78c4b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,6 +34,7 @@ nox = "^2023.4.22"
 nox-poetry = "^1.0.3"
 
 
+
 [build-system]
 requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
diff --git a/src/anthropic/_compat.py b/src/anthropic/_compat.py
index f8e73e40..fed1df05 100644
--- a/src/anthropic/_compat.py
+++ b/src/anthropic/_compat.py
@@ -120,10 +120,10 @@ def model_copy(model: _ModelT) -> _ModelT:
     return model.copy()  # type: ignore
 
 
-def model_json(model: pydantic.BaseModel) -> str:
+def model_json(model: pydantic.BaseModel, *, indent: int | None = None) -> str:
     if PYDANTIC_V2:
-        return model.model_dump_json()
-    return model.json()  # type: ignore
+        return model.model_dump_json(indent=indent)
+    return model.json(indent=indent)  # type: ignore
 
 
 def model_dump(model: pydantic.BaseModel) -> dict[str, Any]:
@@ -132,6 +132,12 @@ def model_dump(model: pydantic.BaseModel) -> dict[str, Any]:
     return cast("dict[str, Any]", model.dict())  # pyright: ignore[reportDeprecated, reportUnnecessaryCast]
 
 
+def model_parse(model: type[_ModelT], data: Any) -> _ModelT:
+    if PYDANTIC_V2:
+        return model.model_validate(data)
+    return model.parse_obj(data)  # pyright: ignore[reportDeprecated]
+
+
 # generic models
 if TYPE_CHECKING:
 
diff --git a/src/anthropic/_types.py b/src/anthropic/_types.py
index 125e1fa2..7ed4bc8a 100644
--- a/src/anthropic/_types.py
+++ b/src/anthropic/_types.py
@@ -31,7 +31,8 @@
 _T = TypeVar("_T")
 
 # Approximates httpx internal ProxiesTypes and RequestFiles types
-ProxiesTypes = Union[str, Proxy, Dict[str, Union[None, str, Proxy]]]
+ProxiesDict = Dict[str, Union[None, str, Proxy]]
+ProxiesTypes = Union[str, Proxy, ProxiesDict]
 FileContent = Union[IO[bytes], bytes]
 FileTypes = Union[
     # file (or bytes)
diff --git a/src/anthropic/_utils/__init__.py b/src/anthropic/_utils/__init__.py
index 05a82c73..b45dc1b1 100644
--- a/src/anthropic/_utils/__init__.py
+++ b/src/anthropic/_utils/__init__.py
@@ -1,6 +1,7 @@
 from ._utils import flatten as flatten
 from ._utils import is_dict as is_dict
 from ._utils import is_list as is_list
+from ._utils import is_given as is_given
 from ._utils import is_mapping as is_mapping
 from ._utils import parse_date as parse_date
 from ._utils import coerce_float as coerce_float
diff --git a/src/anthropic/_utils/_utils.py b/src/anthropic/_utils/_utils.py
index a5541bec..dde4b457 100644
--- a/src/anthropic/_utils/_utils.py
+++ b/src/anthropic/_utils/_utils.py
@@ -7,7 +7,7 @@
 from pathlib import Path
 from typing_extensions import Required, Annotated, TypeGuard, get_args, get_origin
 
-from .._types import NotGiven, FileTypes
+from .._types import NotGiven, FileTypes, NotGivenOr
 from .._compat import is_union as _is_union
 from .._compat import parse_date as parse_date
 from .._compat import parse_datetime as parse_datetime
@@ -100,6 +100,10 @@ def _extract_items(
     return []
 
 
+def is_given(obj: NotGivenOr[_T]) -> TypeGuard[_T]:
+    return not isinstance(obj, NotGiven)
+
+
 # Type safe methods for narrowing types with TypeVars.
 # The default narrowing for isinstance(obj, dict) is dict[unknown, unknown],
 # however this cause Pyright to rightfully report errors. As we know we don't