from the above error output, I can figure out that you're calling the https://platform.openai.com/ endpoint not the Azure OpenAI endpoint.
Instead of importing AzureOpenAI from langchain.llms try AzureChatOpenAI as you're using gpt-35-turbo-16k model. Also install openai package if not installed and try to import the same.
from langchain.chat_models import AzureChatOpenAI import openai
Set up the openai type and base
openai.api_key = "AzureOpenAI key" openai.api_base = "https://YOUR_RESOURCE_NAME.openai.azure.com/" openai.api_type = 'azure' openai.api_version = '2023-03-15-preview'
Now passing the llm to the chain use AzureChatOpenAI instead of AzureOpenAI
llm = AzureChatOpenAI( deployment_name="gpt-35-turbo-16k", openai_api_base="Your base address should look like https://YOUR_RESOURCE_NAME.openai.azure.com/", openai_api_key="Your Azure OpenAI Key", openai_api_type="azure", openai_api_version="2023-03-15-preview")
similarly you need to provide detail for OpenAIEmbeddings()
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