[Bug] Got error only when using OpenAI Chat Model

Questions
1

Describe the problem/error/question

My AI Agent workflow suddenly collapse today.
The error occurred only if I used OpenAI models. If I switched to claude 3.7 or any other models, the workflow will be okay.

What is the error message (if any)?

Invalid schema for function 'format_final_response': In context=('properties', 'output', 'items', 'properties', 'columns'), array schema missing items.

Please share your workflow

Share the output returned by the last node

Information on your n8n setup

  • n8n version: 1.82.3
  • Database (default: SQLite): Postgres
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via: Docker
  • Operating system: Almalinux 9
2

I see you are using gpt 3.5
Have you tried other models, like 4o-mini ?

3

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