Async Responses Structured Outputs Memory leak

[savvasp-123]

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

Using the AsyncResponses client to parse structured outputs there are pydantic models left behind which causes memory to accumulate. Flame graph of the memory leak:

To Reproduce

1. Use the Async Responses .parse() API with a Pydantic model
2. Send large Base 64 Images in the messages using data URIs
3. The memory is not freed

Code snippets

OS

macOS

Python version

Python 13.7

Library version

openai v2.31.0