Setting a custom http_client fails with unexpected keyword argument when use ChatAnthropic

[zhanghao-AI]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

from langchain_anthropic import ChatAnthropic

llm = ChatAnthropic(
thinking={
"type": "enabled",
"budget_tokens": 1024
},
model="claude-3-7-sonnet-20250219",
max_tokens=4096,
http_client=httpx.Client()
)

Error Message and Stack Trace (if applicable)

File "test_claude37_langchain.py", line 46, in
llm_result = llm.invoke(prompt_result)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "\Lib\site-packages\langchain_core\language_models\chat_models.py", line 285, in invoke
self.generate_prompt(
File "\Lib\site-packages\langchain_core\language_models\chat_models.py", line 861, in generate_prompt
return self.generate(prompt_messages, stop=stop, callbacks=callbacks, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "\Lib\site-packages\langchain_core\language_models\chat_models.py", line 691, in generate
self._generate_with_cache(
File "\Lib\site-packages\langchain_core\language_models\chat_models.py", line 926, in _generate_with_cache
result = self._generate(
^^^^^^^^^^^^^^^
File "\Lib\site-packages\langchain_anthropic\chat_models.py", line 948, in _generate
data = self._client.messages.create(**payload)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "\Lib\site-packages\anthropic_utils_utils.py", line 275, in wrapper
return func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
TypeError: Messages.create() got an unexpected keyword argument 'http_client'

Description

When I use ChatAnthropic, I want to customize http_client. I noticed that ChatOpenAI can do this. But when I use ChatAnthropic, it doesn't work. Does ChatAnthropic not handle this parameter? I can set it using the anthropic SDK. Do you plan to add this parameter in the next version?

System Info

System Information

OS: Windows
OS Version: 10.0.22631
Python Version: 3.11.11 | packaged by Anaconda, Inc. | (main, Dec 11 2024, 16:34:19) [MSC v.1929 64 bit (AMD64)]

Package Information

langchain_core: 0.3.41
langchain: 0.3.20
langchain_community: 0.3.19
langsmith: 0.1.147
langchain_anthropic: 0.3.9
langchain_elasticsearch: 0.3.2
langchain_experimental: 0.3.4
langchain_google_genai: 2.0.10
langchain_openai: 0.3.7
langchain_pinecone: 0.2.3
langchain_tests: 0.3.12
langchain_text_splitters: 0.3.6
langchainhub: 0.1.21
langgraph_sdk: 0.1.53

Optional packages not installed

langserve

Other Dependencies

aiohttp<3.11,>=3.10: Installed. No version info available.
aiohttp<4.0.0,>=3.8.3: Installed. No version info available.
anthropic<1,>=0.47.0: Installed. No version info available.
async-timeout<5.0.0,>=4.0.0;: Installed. No version info available.
dataclasses-json<0.7,>=0.5.7: Installed. No version info available.
elasticsearch[vectorstore-mmr]: Installed. No version info available.
filetype: 1.2.0
google-generativeai: 0.8.4
httpx: 0.28.1
httpx-sse<1.0.0,>=0.4.0: Installed. No version info available.
httpx<1,>=0.25.0: Installed. No version info available.
jsonpatch<2.0,>=1.33: Installed. No version info available.
langchain-anthropic;: Installed. No version info available.
langchain-aws;: Installed. No version info available.
langchain-cohere;: Installed. No version info available.
langchain-community;: Installed. No version info available.
langchain-core<1.0.0,>=0.3.34: Installed. No version info available.
langchain-core<1.0.0,>=0.3.35: Installed. No version info available.
langchain-core<1.0.0,>=0.3.39: Installed. No version info available.
langchain-core<1.0.0,>=0.3.41: Installed. No version info available.
langchain-deepseek;: Installed. No version info available.
langchain-fireworks;: Installed. No version info available.
langchain-google-genai;: Installed. No version info available.
langchain-google-vertexai;: Installed. No version info available.
langchain-groq;: Installed. No version info available.
langchain-huggingface;: Installed. No version info available.
langchain-mistralai;: Installed. No version info available.
langchain-ollama;: Installed. No version info available.
langchain-openai;: Installed. No version info available.
langchain-tests<1.0.0,>=0.3.7: Installed. No version info available.
langchain-text-splitters<1.0.0,>=0.3.6: Installed. No version info available.
langchain-together;: Installed. No version info available.
langchain-xai;: Installed. No version info available.
langchain<1.0.0,>=0.3.20: Installed. No version info available.
langsmith-pyo3: Installed. No version info available.
langsmith<0.4,>=0.1.125: Installed. No version info available.
langsmith<0.4,>=0.1.17: Installed. No version info available.
numpy<2.0.0,>=1.24.0;: Installed. No version info available.
numpy<2.0.0,>=1.26.4: Installed. No version info available.
numpy<3,>=1.26.2: Installed. No version info available.
numpy<3,>=1.26.2;: Installed. No version info available.
openai<2.0.0,>=1.58.1: Installed. No version info available.
orjson: 3.10.15
packaging: 24.2
packaging<25,>=23.2: Installed. No version info available.
pinecone<6.0.0,>=5.4.0: Installed. No version info available.
pydantic: 2.10.6
pydantic-settings<3.0.0,>=2.4.0: Installed. No version info available.
pydantic<3.0.0,>=2.5.2;: Installed. No version info available.
pydantic<3.0.0,>=2.7.4: Installed. No version info available.
pydantic<3.0.0,>=2.7.4;: Installed. No version info available.
pytest-asyncio<1,>=0.20: Installed. No version info available.
pytest-socket<1,>=0.6.0: Installed. No version info available.
pytest<9,>=7: Installed. No version info available.
PyYAML>=5.3: Installed. No version info available.
requests: 2.32.3
requests-toolbelt: 1.0.0
requests<3,>=2: Installed. No version info available.
SQLAlchemy<3,>=1.4: Installed. No version info available.
syrupy<5,>=4: Installed. No version info available.
tenacity!=8.4.0,<10,>=8.1.0: Installed. No version info available.
tenacity!=8.4.0,<10.0.0,>=8.1.0: Installed. No version info available.
tiktoken<1,>=0.7: Installed. No version info available.
types-requests: 2.32.0.20250301
typing-extensions>=4.7: Installed. No version info available.

[chakravarthik27]

Hi @zhanghao-AI ,

are you working on this feature?

[zhanghao-AI]

Hi @zhanghao-AI ,

are you working on this feature?

I encountered this problem when I used langchain to call the claude-3-7-sonnet-20250219 model, and it has not been solved yet. Do you have any solution?

[chakravarthik27]

No, but I will fix this issue as soon as possible.

[zhouruiliangxian]

---

TypeError Traceback (most recent call last)
Cell In[1], line 2
1 from langchain_openai import ChatOpenAI
----> 2 llm = ChatOpenAI(
3 temperature=0.95,
4 model="GLM-4-Air",
5 openai_api_key="",
6 openai_api_base="https://open.bigmodel.cn/api/paas/v4/",
7 )

File d:\soft\anaconda\envs\langchain\Lib\site-packages\langchain_core\load\serializable.py:125, in Serializable.init(self, *args, **kwargs)
123 def init(self, *args: Any, **kwargs: Any) -> None:
124 """"""
--> 125 super().init(*args, **kwargs)

[... skipping hidden 1 frame]

File d:\soft\anaconda\envs\langchain\Lib\site-packages\langchain_openai\chat_models\base.py:527, in BaseChatOpenAI.validate_environment(self)
525 self.http_client = httpx.Client(proxy=self.openai_proxy)
526 sync_specific = {"http_client": self.http_client}
--> 527 self.root_client = openai.OpenAI(**client_params, **sync_specific) # type: ignore[arg-type]
528 self.root_client = openai.OpenAI(**client_params) # type: ignore[arg-type]
529 self.client = self.root_client.chat.completions

File d:\soft\anaconda\envs\langchain\Lib\site-packages\openai_client.py:123, in OpenAI.init(self, api_key, organization, project, base_url, timeout, max_retries, default_headers, default_query, http_client, _strict_response_validation)
120 if base_url is None:
121 base_url = f"https://api.openai.com/v1"
--> 123 super().init(
124 version=version,
125 base_url=base_url,
126 max_retries=max_retries,
127 timeout=timeout,
128 http_client=http_client,
129 custom_headers=default_headers,
130 custom_query=default_query,
131 _strict_response_validation=_strict_response_validation,
132 )
134 self._default_stream_cls = Stream
136 self.completions = resources.Completions(self)

File d:\soft\anaconda\envs\langchain\Lib\site-packages\openai_base_client.py:856, in SyncAPIClient.init(self, version, base_url, max_retries, timeout, transport, proxies, limits, http_client, custom_headers, custom_query, _strict_response_validation)
839 raise TypeError(
840 f"Invalid http_client argument; Expected an instance of httpx.Client but got {type(http_client)}"
841 )
843 super().init(
844 version=version,
845 limits=limits,
(...) 854 _strict_response_validation=_strict_response_validation,
855 )
--> 856 self._client = http_client or SyncHttpxClientWrapper(
857 base_url=base_url,
858 # cast to a valid type because mypy doesn't understand our type narrowing
859 timeout=cast(Timeout, timeout),
860 proxies=proxies,
861 transport=transport,
862 limits=limits,
863 follow_redirects=True,
864 )

File d:\soft\anaconda\envs\langchain\Lib\site-packages\openai_base_client.py:754, in _DefaultHttpxClient.init(self, **kwargs)
752 kwargs.setdefault("limits", DEFAULT_CONNECTION_LIMITS)
753 kwargs.setdefault("follow_redirects", True)
--> 754 super().init(**kwargs)

TypeError: Client.init() got an unexpected keyword argument 'proxies'

I also have the same problem, what the problem is?

[chakravarthik27]

proxies

A dependencies issue arose with httpx. To fix this, you can either upgrade the OpenAI SDK or downgrade the httpx version.

References:
https://community.openai.com/t/error-with-openai-1-56-0-client-init-got-an-unexpected-keyword-argument-proxies/1040332/12