How to setup Reasoning Effort for GPT-5* models?

[doggy8088]

Right now, when I use new CopilotClient(), I can only specify the model. Is there a way to set the Reasoning Effort for GPT-5* models?

[github-actions]

Thank you for opening this issue, @doggy8088!

I've labeled this as both enhancement and question since you're asking about functionality that doesn't currently exist in the SDK.

Based on my review of the codebase, the SDK currently only supports specifying the model name when creating a session. Advanced model parameters like reasoning effort for GPT-5* models are not yet exposed through the SDK's API.

To better understand your use case and help prioritize this enhancement:

• Which SDK language are you using (.NET, Go, Node.js, or Python)?
• What specific reasoning effort values do you need to configure?
• Is this blocking your work, or is it a nice-to-have feature?

This would be a valuable addition to the SDK's capabilities!

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