GPT-5 Chain Of Thought

[passacagllia]

Question

I am using

[[package]]
name = "openai-agents"
version = "0.2.8"
description = "OpenAI Agents SDK"

with Azure Open AI Gpt-5 Model.

This is my code:

  async for event in result.stream_events():
      if event.type == "raw_response_event":
          if isinstance(event.data, ResponseTextDeltaEvent):
              print(event.data.delta)
              # When the agent updates, print that
          elif isinstance(event.data, ResponseReasoningSummaryPartAddedEvent):
              print(event.data)
          elif isinstance(event.data, ResponseReasoningSummaryTextDeltaEvent):
              print(event.data)

I can not catch any events from ResponseReasoningSummaryPartAddedEvent and ResponseReasoningSummaryTextDeltaEvent to stream ChainOfThoughts.

My settings:
reasoning_effort: "medium"
summary: "detailed"
verbosity: "medium"

Thank you.

[rm-openai]

You most likely need to request reasoning summaries. Via https://openai.github.io/openai-agents-python/ref/model_settings/#agents.model_settings.ModelSettings.reasoning

e.g. set summary; "auto" or similar

[seratch]

This example should demonstrate what you want to do: https://github.com/openai/openai-agents-python/blob/v0.2.9/examples/reasoning_content/runner_example.py#L52-L67

[passacagllia]

Thank you. The issue comes from prompt.

I need to add:

<persistence>
Always provide reasoning summaries. 
</persistence>