• This is actually a bug report.

What Model are you using?

Qwen3-VL-4b-instruct

Describe the bug
‘generator’ object has no attribute ‘_raw_response’
error:

<last_exception>
    'generator' object has no attribute '_raw_response' and no __dict__ for setting new attributes
</last_exception>

Root Cause:

In process_response.py, line ~268:

python

if isinstance(response_model, ParallelBase): # ❌ BUG

Should be:

python

if inspect.isclass(response_model) and issubclass(response_model, ParallelBase):