Confirm this is an issue with the Python library and not an underlying OpenAI API

• This is an issue with the Python library

Describe the bug

I am using the web search tool with o4-mini model and streaming. When it started searching the web, I received the following event:

ResponseOutputItemAddedEvent( item=ResponseOutputMessage( id='ws_686cdee20f548198a67dbdf8d44541fe02350ff60608d7b6', content=None, role=None, status='in_progress', type='web_search_call' ), output_index=1, sequence_number=4, type='response.output_item.added' ) 

It looks like the item type (ResponseOutputMessage) was identified incorrectly, should have been ResponseFunctionWebSearch.

Interestingly, the following ResponseOutputItemDoneEvent had the correct item.

To Reproduce

1. Perform a web search using streaming and o4-mini

Code snippets

OS

Fedora 42

Python version

Python 3.13.3

Library version

openai v1.93.1