("Error code: 400 - {'error': {'message': 'Request contains an invalid argument....
🚨 错误信息
BadRequestError("Error code: 400 - {'error': {'message': 'Request contains an invalid argument. (request id: 2025111917312841895688sb0yhHlV) (request id: 2025111917312841362809xQocweJf)', 'type': 'rix_api_error', 'param': '', 'code': 400}}")Traceback (most recent call last):
File "/localdata/hyzhou/miniconda3/envs/heychou/lib/python3.13/site-packages/langchain_core/language_models/chat_models.py", line 914, in generate
self._generate_with_cache(
~~~~~~~~~~~~~~~~~~~~~~~~~^
m,
^^
...<2 lines>...
**kwargs,
^^^^^^^^^
)
^
File "/localdata/hyzhou/miniconda3/envs/heychou/lib/python3.13/site-packages/langchain_core/language_models/chat_models.py", line 1208, in _generate_with_cache
result = self._generate(
messages, stop=stop, run_manager=run_manager, **kwargs
)
File "/localdata/hyzhou/miniconda3/envs/heychou/lib/python3.13/site-packages/langchain_openai/chat_models/base.py", line 1213, in _generate
raise e
File "/localdata/hyzhou/miniconda3/envs/heychou/lib/python3.13/site-packages/langchain_openai/chat_models/base.py", line 1208, in _generate
raw_response = self.client.with_raw_response.create(**payload)
File "/localdata/hyzhou/miniconda3/envs/heychou/lib/python3.13/site-packages/openai/_legacy_response.py", line 364, in wrapped
return cast(LegacyAPIResponse[R], func(*args, **kwargs))
~~~~^^^^^^^^^^^^^^^^^
File "/localdata/hyzhou/miniconda3/envs/heychou/lib/python3.13/site-packages/openai/_utils/_utils.py", line 286, in wrapper
return func(*args, **kwargs)
File "/localdata/hyzhou/miniconda3/envs/heychou/lib/python3.13/site-packages/openai/resources/chat/completions/completions.py", line 1147, in create
return self._post(
~~~~~~~~~~^
"/chat/completions",
^^^^^^^^^^^^^^^^^^^^
...<46 lines>...
stream_cls=Stream[ChatCompletionChunk],
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/localdata/hyzhou/miniconda3/envs/heychou/lib/python3.13/site-packages/openai/_base_client.py", line 1259, in post
return cast(ResponseT, self.request(cast_to, opts, stream=stream, stream_cls=stream_cls))
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/localdata/hyzhou/miniconda3/envs/heychou/lib/python3.13/site-packages/openai/_base_client.py", line 1047, in request
raise self._make_status_error_from_response(err.response) from None
openai.BadRequestError: Error code: 400 - {'error': {'message': 'Request contains an invalid argument. (request id: 2025111917312841895688sb0yhHlV) (request id: 2025111917312841362809xQocweJf)', 'type': 'rix_api_error', 'param': '', 'code': 400}}
🤖 AI解决方案
错误翻译
原文：Request contains an invalid argument.
译文：请求包含无效参数。原因分析
这是一个 OpenAI API 的 400 错误，发生在使用langchain_openai 库调用聊天模型时。根本原因是传递给 OpenAI API 的请求参数中存在无效或不支持的参数。
从调用栈可以看出错误发生在：
langchain_openai/chat_models/base.py中的_generate方法- 调用 OpenAI Python SDK 的
chat.completions.create()接口时参数验证失败
解决方案
检查并修复参数配置
# 检查当前的模型配置
from langchain_openai import ChatOpenAI
# 确保使用正确的模型名称
chat = ChatOpenAI(
model="gpt-3.5-turbo", # 或 "gpt-4", "gpt-4-turbo"
temperature=0.7,
max_tokens=1000,
# 移除可能不支持的参数
)
# 或者使用更简单的配置
chat = ChatOpenAI(model="gpt-3.5-turbo")排查步骤
# 调试方法：逐步添加参数
config = {"model": "gpt-3.5-turbo"}
# 逐个添加参数测试
config.update({"temperature": 0.7})
config.update({"max_tokens": 1000})
# 如果某个参数添加后报错，说明该参数有问题️ 预防措施
1. 参数验证最佳实践
openai 和 langchain-openai 包以获取最新兼容性2. 调试工具推荐
stream=True 进行流式调试，更容易定位问题参数# 启用详细日志
import logging
logging.basicConfig(level=logging.DEBUG)