🐛 Bug Report: AnthropicInstrumentor is not supporting `get_final_message`

[MiloParigi]

Which component is this bug for?

Anthropic Instrumentation

📜 Description

The current implementation (0.46.2) of opentelemetry-instrumentation-anthropic does not support the get_final_message method from the Anthropic SDK

When trying to use the get_final_message property of an async_generator object, the property is not present in the async_generator object: AttributeError: 'async_generator' object has no attribute 'get_final_message'

👟 Reproduction steps

In a new, clean environment (I'm using Python 3.13.5 personally)

requirements.txt

anthropic==0.66.0
opentelemetry-instrumentation-anthropic==0.46.2

main.py

import asyncio
from anthropic import AsyncAnthropic
from opentelemetry.instrumentation.anthropic import AnthropicInstrumentor

# AnthropicInstrumentor().instrument() # Uncommenting this will make the call fail

async def main() -> None:
    """
    This comes directly from the Github README of the Anthropic SDK
    
    https://github.com/anthropics/anthropic-sdk-python?tab=readme-ov-file#streaming-helpers
    """
    client = AsyncAnthropic(api_key="sk-XXX")

    async with client.messages.stream(
        max_tokens=1024,
        messages=[
            {
                "role": "user",
                "content": "Say hello there!",
            }
        ],
        model="claude-sonnet-4-20250514",
    ) as stream:
        message = await stream.get_final_message()
        print(message.to_json())

asyncio.run(main())

Then launch main.py, once with the telemetry commented out (it works), once without (it fails)

👍 Expected behavior

The call should not fail and traces should be sent

👎 Actual Behavior with Screenshots

It fails with an error

🤖 Python Version

3.13.5

📃 Provide any additional context for the Bug.

I think it might not be just the get_final_message, but some/all stream helpers, because the same issue arise when using the example from the SDK with text_stream: Anthropic SDK - Streaming Helpers

Looking at the SDK docs on helpers, we might want to add some unit-tests for the following methods:

• async_generator.close()
• async_generator.until_done()
• async_generator.get_final_message()
• async_generator.get_final_text()
• async_generator.text_stream()

👀 Have you spent some time to check if this bug has been raised before?

• I checked and didn't find similar issue

Are you willing to submit PR?

None

[nirga]

Thanks for reporting @MiloParigi! Taking a look