---
type: email
from: exiao <notifications@github.com>
subject: Re: [openai/openai-agents-python] Title: Handoff fails with Invalid

 'input[1].id': '__fake_id__' when using non-OpenAI models and OpenAI tracing

 (Issue #1485)
received: 2026-03-06 07:22:40
date_header: Fri, 05 Sep 2025 07:24:36 -0700
priority: normal
status: awaiting_approval
uid: 29593
---

## Email Content

**From:** exiao <notifications@github.com>
**Subject:** Re: [openai/openai-agents-python] Title: Handoff fails with Invalid

 'input[1].id': '__fake_id__' when using non-OpenAI models and OpenAI tracing

 (Issue #1485)
**Date:** Fri, 05 Sep 2025 07:24:36 -0700

### Body (preview)

exiao left a comment (openai/openai-agents-python#1485)



Just to be clear, the handoff_agent by default uses GPT-5 responses API. To fix this, you need to set the default or the handoff model to be using Chat Completions? @seratch 



e.g.

```python

set_default_openai_api("chat_completions")

```



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