diff --git a/poetry.lock b/poetry.lock
index ec87713f..ff167fec 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,9 +1,10 @@
-# This file is automatically @generated by Poetry 1.5.0 and should not be changed by hand.
+# This file is automatically @generated by Poetry and should not be changed by hand.
 
 [[package]]
 name = "anyio"
 version = "3.6.2"
 description = "High level compatibility layer for multiple asynchronous event loop implementations"
+category = "main"
 optional = false
 python-versions = ">=3.6.2"
 files = [
@@ -25,6 +26,7 @@ trio = ["trio (>=0.16,<0.22)"]
 name = "atomicwrites"
 version = "1.4.1"
 description = "Atomic file writes."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -35,6 +37,7 @@ files = [
 name = "attrs"
 version = "22.1.0"
 description = "Classes Without Boilerplate"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
 files = [
@@ -52,6 +55,7 @@ tests-no-zope = ["cloudpickle", "coverage[toml] (>=5.0.2)", "hypothesis", "mypy
 name = "black"
 version = "22.10.0"
 description = "The uncompromising code formatter."
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -97,6 +101,7 @@ uvloop = ["uvloop (>=0.15.2)"]
 name = "certifi"
 version = "2023.5.7"
 description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -108,6 +113,7 @@ files = [
 name = "click"
 version = "8.1.3"
 description = "Composable command line interface toolkit"
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -123,6 +129,7 @@ importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
 name = "colorama"
 version = "0.4.6"
 description = "Cross-platform colored terminal text."
+category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
 files = [
@@ -134,6 +141,7 @@ files = [
 name = "distro"
 version = "1.8.0"
 description = "Distro - an OS platform information API"
+category = "main"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -145,6 +153,7 @@ files = [
 name = "h11"
 version = "0.12.0"
 description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
+category = "main"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -156,6 +165,7 @@ files = [
 name = "httpcore"
 version = "0.15.0"
 description = "A minimal low-level HTTP client."
+category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -164,19 +174,20 @@ files = [
 ]
 
 [package.dependencies]
-anyio = "==3.*"
+anyio = ">=3.0.0,<4.0.0"
 certifi = "*"
 h11 = ">=0.11,<0.13"
-sniffio = "==1.*"
+sniffio = ">=1.0.0,<2.0.0"
 
 [package.extras]
 http2 = ["h2 (>=3,<5)"]
-socks = ["socksio (==1.*)"]
+socks = ["socksio (>=1.0.0,<2.0.0)"]
 
 [[package]]
 name = "httpx"
 version = "0.23.0"
 description = "The next generation HTTP client."
+category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -192,14 +203,15 @@ sniffio = "*"
 
 [package.extras]
 brotli = ["brotli", "brotlicffi"]
-cli = ["click (==8.*)", "pygments (==2.*)", "rich (>=10,<13)"]
+cli = ["click (>=8.0.0,<9.0.0)", "pygments (>=2.0.0,<3.0.0)", "rich (>=10,<13)"]
 http2 = ["h2 (>=3,<5)"]
-socks = ["socksio (==1.*)"]
+socks = ["socksio (>=1.0.0,<2.0.0)"]
 
 [[package]]
 name = "idna"
 version = "3.4"
 description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 files = [
@@ -211,6 +223,7 @@ files = [
 name = "importlib-metadata"
 version = "5.0.0"
 description = "Read metadata from Python packages"
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -231,6 +244,7 @@ testing = ["flake8 (<5)", "flufl.flake8", "importlib-resources (>=1.3)", "packag
 name = "iniconfig"
 version = "1.1.1"
 description = "iniconfig: brain-dead simple config-ini parsing"
+category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -242,6 +256,7 @@ files = [
 name = "isort"
 version = "5.10.1"
 description = "A Python utility / library to sort Python imports."
+category = "dev"
 optional = false
 python-versions = ">=3.6.1,<4.0"
 files = [
@@ -259,6 +274,7 @@ requirements-deprecated-finder = ["pip-api", "pipreqs"]
 name = "mypy"
 version = "1.1.1"
 description = "Optional static typing for Python"
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -306,6 +322,7 @@ reports = ["lxml"]
 name = "mypy-extensions"
 version = "1.0.0"
 description = "Type system extensions for programs checked with the mypy type checker."
+category = "dev"
 optional = false
 python-versions = ">=3.5"
 files = [
@@ -317,6 +334,7 @@ files = [
 name = "nodeenv"
 version = "1.7.0"
 description = "Node.js virtual environment builder"
+category = "dev"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*"
 files = [
@@ -331,6 +349,7 @@ setuptools = "*"
 name = "packaging"
 version = "21.3"
 description = "Core utilities for Python packages"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -345,6 +364,7 @@ pyparsing = ">=2.0.2,<3.0.5 || >3.0.5"
 name = "pathspec"
 version = "0.10.1"
 description = "Utility library for gitignore style pattern matching of file paths."
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -356,6 +376,7 @@ files = [
 name = "platformdirs"
 version = "2.5.2"
 description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -371,6 +392,7 @@ test = ["appdirs (==1.4.4)", "pytest (>=6)", "pytest-cov (>=2.7)", "pytest-mock
 name = "pluggy"
 version = "1.0.0"
 description = "plugin and hook calling mechanisms for python"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -389,6 +411,7 @@ testing = ["pytest", "pytest-benchmark"]
 name = "py"
 version = "1.11.0"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 files = [
@@ -400,6 +423,7 @@ files = [
 name = "pydantic"
 version = "1.10.2"
 description = "Data validation and settings management using python type hints"
+category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -452,6 +476,7 @@ email = ["email-validator (>=1.0.3)"]
 name = "pyparsing"
 version = "3.0.9"
 description = "pyparsing module - Classes and methods to define and execute parsing grammars"
+category = "dev"
 optional = false
 python-versions = ">=3.6.8"
 files = [
@@ -464,13 +489,14 @@ diagrams = ["jinja2", "railroad-diagrams"]
 
 [[package]]
 name = "pyright"
-version = "1.1.297"
+version = "1.1.318"
 description = "Command line wrapper for pyright"
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "pyright-1.1.297-py3-none-any.whl", hash = "sha256:3fd6528280eb649f8b64b7ece55299f01e340d29f4cf257da876957e3ee24062"},
-    {file = "pyright-1.1.297.tar.gz", hash = "sha256:89082de2fbd240fa75767b57824f4d8516f2fb9005047265a67b895547c6272f"},
+    {file = "pyright-1.1.318-py3-none-any.whl", hash = "sha256:056c1b2e711c3526e32919de1684ae599d34b7ec27e94398858a43f56ac9ba9b"},
+    {file = "pyright-1.1.318.tar.gz", hash = "sha256:69dcf9c32d5be27d531750de627e76a7cadc741d333b547c09044278b508db7b"},
 ]
 
 [package.dependencies]
@@ -485,6 +511,7 @@ dev = ["twine (>=3.4.1)"]
 name = "pytest"
 version = "7.1.1"
 description = "pytest: simple powerful testing with Python"
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -510,6 +537,7 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.
 name = "pytest-asyncio"
 version = "0.18.3"
 description = "Pytest support for asyncio"
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -529,6 +557,7 @@ testing = ["coverage (==6.2)", "flaky (>=3.5.0)", "hypothesis (>=5.7.1)", "mypy
 name = "python-dateutil"
 version = "2.8.2"
 description = "Extensions to the standard Python datetime module"
+category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
 files = [
@@ -543,6 +572,7 @@ six = ">=1.5"
 name = "respx"
 version = "0.19.2"
 description = "A utility for mocking out the Python HTTPX and HTTP Core libraries."
+category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -557,6 +587,7 @@ httpx = ">=0.21.0"
 name = "rfc3986"
 version = "1.5.0"
 description = "Validating URI References per RFC 3986"
+category = "main"
 optional = false
 python-versions = "*"
 files = [
@@ -574,6 +605,7 @@ idna2008 = ["idna"]
 name = "ruff"
 version = "0.0.239"
 description = "An extremely fast Python linter, written in Rust."
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -599,6 +631,7 @@ files = [
 name = "setuptools"
 version = "67.4.0"
 description = "Easily download, build, install, upgrade, and uninstall Python packages"
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -615,6 +648,7 @@ testing-integration = ["build[virtualenv]", "filelock (>=3.4.0)", "jaraco.envs (
 name = "six"
 version = "1.16.0"
 description = "Python 2 and 3 compatibility utilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
@@ -626,6 +660,7 @@ files = [
 name = "sniffio"
 version = "1.3.0"
 description = "Sniff out which async library your code is running under"
+category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -637,6 +672,7 @@ files = [
 name = "time-machine"
 version = "2.9.0"
 description = "Travel through time in your tests."
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -702,6 +738,7 @@ python-dateutil = "*"
 name = "tokenizers"
 version = "0.13.3"
 description = "Fast and Customizable Tokenizers"
+category = "main"
 optional = false
 python-versions = "*"
 files = [
@@ -756,6 +793,7 @@ testing = ["black (==22.3)", "datasets", "numpy", "pytest", "requests"]
 name = "tomli"
 version = "2.0.1"
 description = "A lil' TOML parser"
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -767,6 +805,7 @@ files = [
 name = "typed-ast"
 version = "1.5.4"
 description = "a fork of Python 2 and 3 ast modules with type comment support"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -800,6 +839,7 @@ files = [
 name = "typing-extensions"
 version = "4.4.0"
 description = "Backported and Experimental Type Hints for Python 3.7+"
+category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -811,6 +851,7 @@ files = [
 name = "zipp"
 version = "3.10.0"
 description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -825,4 +866,4 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.7"
-content-hash = "f5fdf6ef5927ee70edc9c12f2ea92376d8d567d5ea438f4b10d22a7e848bbcb9"
+content-hash = "d5c34eddc018d813d844b29027d8c9b45ae4a65da0a7246348c310893e507e9e"
diff --git a/pyproject.toml b/pyproject.toml
index d20892b5..22960de1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ distro = ">= 1.7.0, < 2"
 tokenizers = ">= 0.13.0"
 
 [tool.poetry.group.dev.dependencies]
-pyright = "1.1.297"
+pyright = "1.1.318"
 mypy = "1.1.1"
 black = "22.10.0"
 respx = "0.19.2"
diff --git a/src/anthropic/_base_client.py b/src/anthropic/_base_client.py
index 333b9c0c..6e7ae440 100644
--- a/src/anthropic/_base_client.py
+++ b/src/anthropic/_base_client.py
@@ -834,7 +834,7 @@ def _request_api_list(
         page: Type[SyncPageT],
         options: FinalRequestOptions,
     ) -> SyncPageT:
-        resp = cast(SyncPageT, self.request(page, options, stream=False))
+        resp = self.request(page, options, stream=False)
         resp._set_private_attributes(  # pyright: ignore[reportPrivateUsage]
             client=self,
             model=model,
@@ -955,7 +955,7 @@ def patch(
         options: RequestOptions = {},
     ) -> ResponseT:
         opts = FinalRequestOptions.construct(method="patch", url=path, json_data=body, **options)
-        return cast(ResponseT, self.request(cast_to, opts))
+        return self.request(cast_to, opts)
 
     def put(
         self,
@@ -967,7 +967,7 @@ def put(
         options: RequestOptions = {},
     ) -> ResponseT:
         opts = FinalRequestOptions.construct(method="put", url=path, json_data=body, files=files, **options)
-        return cast(ResponseT, self.request(cast_to, opts))
+        return self.request(cast_to, opts)
 
     def delete(
         self,
@@ -978,7 +978,7 @@ def delete(
         options: RequestOptions = {},
     ) -> ResponseT:
         opts = FinalRequestOptions.construct(method="delete", url=path, json_data=body, **options)
-        return cast(ResponseT, self.request(cast_to, opts))
+        return self.request(cast_to, opts)
 
     def get_api_list(
         self,