I was getting the error as: openai.NotFoundError: Error code: 404 - {'error': {'code': '404', 'message': 'Resource not found'}}
when i try calling the azure openai on the autogen.
autogen-agentchat 0.6.2
autogen-core 0.6.2
autogen-ext 0.6.2

sample code:
import os
import asyncio
from dotenv import load_dotenv

from autogen_agentchat.agents import AssistantAgent, UserProxyAgent
from autogen_core.tools import FunctionTool
from autogen_ext.models.openai import OpenAIChatCompletionClient
from autogen_agentchat.messages import TextMessage

Load API keys and configs

load_dotenv()

Azure OpenAI configuration

api_key = os.getenv("AZURE_OPENAI_API_KEY")
deployment = os.getenv("AZURE_OPENAI_DEPLOYMENT")
api_base = os.getenv("AZURE_OPENAI_ENDPOINT")
api_version = os.getenv("AZURE_OPENAI_API_VERSION")

print("🔐 Using API:", api_key)
print("🌐 Base URL:", api_base)
print("🧠 Deployment:", deployment)
print("📅 API version:", api_version)

✅ Correct Azure-compatible model client

model_client = OpenAIChatCompletionClient(
model=deployment, # Logical model name (same as deployment)
api_key=api_key,
base_url=api_base,
api_version=api_version,
api_type="azure",
deployment_name=deployment # 🔥 CRITICAL for Azure deployments
)

✅ Tool function

async def multiply(a: int, b: int) -> int:
"""Multiply two integers."""
return a * b

tool = FunctionTool(multiply, description="Multiplies two integers")

✅ Agent setup

assistant = AssistantAgent(
name="assistant",
model_client=model_client,
tools=[tool],
system_message="You are a helpful assistant that uses tools to solve math problems."
)

user = UserProxyAgent(name="user")

✅ Message loop

async def main():
print("💬 Sending message to assistant...")
async for event in assistant.on_messages_stream(
messages=[TextMessage(content="Multiply 8 and 5", source=user.name)],
cancellation_token=None
):
print(f"\n🧠 [{event.class.name}]:\n{event.content}")

✅ Run

if name == "main":
asyncio.run(main())