---
type: email
from: Christian Raasteen <notifications@github.com>
subject: Re: [openai/openai-agents-python] GPT-5 + tool calls: Error code: 400

 - Item 'rs_...' of type 'reasoning' was provided without its required

 following item. (Issue #1660)
received: 2026-03-06 07:59:27
date_header: Wed, 08 Oct 2025 09:11:30 -0700
priority: normal
status: awaiting_approval
uid: 32134
---

## Email Content

**From:** Christian Raasteen <notifications@github.com>
**Subject:** Re: [openai/openai-agents-python] GPT-5 + tool calls: Error code: 400

 - Item 'rs_...' of type 'reasoning' was provided without its required

 following item. (Issue #1660)
**Date:** Wed, 08 Oct 2025 09:11:30 -0700

### Body (preview)

ChrisRawstone left a comment (openai/openai-agents-python#1660)



Also get this issue with handoff and tool calls with gpt-5 models... Seems quite critical that this is not working. Might have to switch to an another agent framework because of this:(



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