AttributeError: 'Response' object has no attribute 'response_id' when using streaming

[shatsss]

Bug: AttributeError: 'Response' object has no attribute 'response_id'

Environment: openai-agents 0.9.1, openai 2.21.0, Python 3.10

Issue: The SDK tries to access response_id on Response objects, but the field is actually named id.

Location: agents/run.py line 1179 (and lines 677, 790, 1118, 1128)

Error:

response_id=turn_result.model_response.response_id  # ❌ response_id doesn't exist
AttributeError: 'Response' object has no attribute 'response_id'

Root Cause:
The Response class from openai.types.responses has an id field, not response_id:

Response.model_fields.keys()  # includes 'id', 'previous_response_id', but NOT 'response_id'

Fix:
Change all occurrences from:

turn_result.model_response.response_id

to:

turn_result.model_response.id

Impact: Affects custom model implementations that return Response objects, particularly when using streaming.

Workaround:

from openai.types.responses import Response

@property
def response_id(self):
    return self.id

Response.response_id = response_id

[IdanArbiv]

Finally! I’ve needed this for so long!

[ihower]

@shatsss I think the problem is not that Response is missing response_id.

The key point is that turn_result.model_response should be a ModelResponse object. And ModelResponse does have a response_id field.

Are you using a custom model? If yes, please check your CustomModel code. The get_response function should return a ModelResponse object, not a Response object.