Getting "Resource not found" when following the LangChain Tutorial for Azure OpenAI

[4quen]

Checked other resources

• I added a very descriptive title to this question.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.

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• I commit to help with one of those options 👆

Example Code

import os
from langchain_openai import AzureChatOpenAI

os.environ["AZURE_OPENAI_API_KEY"] = 'my-api-key'
os.environ["AZURE_OPENAI_ENDPOINT"] = 'https://my-endpoint.openai.azure.com'
os.environ["AZURE_OPENAI_DEPLOYMENT_NAME"] = 'gpt-4o-mini-rag'
os.environ["AZURE_OPENAI_API_VERSION"] = '2024-07-18'

model = AzureChatOpenAI(
    azure_endpoint=os.environ["AZURE_OPENAI_ENDPOINT"],
    azure_deployment=os.environ["AZURE_OPENAI_DEPLOYMENT_NAME"],
    openai_api_version=os.environ["AZURE_OPENAI_API_VERSION"],
)

from langchain_core.messages import HumanMessage, SystemMessage

messages = [
    SystemMessage(content="Translate the following from English into Italian"),
    HumanMessage(content="hi!"),
]

model.invoke(messages)

Description

Hi all,

I'm currently trying to do this LangChain tutorial with Azure OpenAI.

This is the error message I receive: "NotFoundError: Error code: 404 - {'error': {'code': '404', 'message': 'Resource not found'}}"

This is how the configuration in Azure Studio looks like (including where I took the parameters from):

I also tried the URL endpoint with "/openai" as suggested in another discussion here.
I also tried with the whole URL.

But every time I receive the same error. :-/

System Info

langchain = 0.3.3
langchain-community = 0.3.2
langchain-core = 0.3.10
langchain-openai = 0.2.2

IDE: PyCharm Professional
Platform: Windows
Python Version: 3.12

[4quen]

Now I can answer my own question.

The API version on the deployment tab is wrong (see screenshot above).

When opening the "sample code" tab in the chat playground a different API version is shown:

So there is a missmatch between the deployment tab and chat playground.
I hope that this answer will help others in the future.