OpenAI node: O1 models - JSON output fails

[cedricziel]

Bug Description

OpenAI text completion fails with hint that o1 doesn't support a system prompt

To Reproduce

1. create an openai text node
2. select an o1 modle
3. set "Output Content as JSON" to true
4. See that executions fail with the hint that this model doesn't like system prompts

Expected behavior

The API call should succeed

Operating System

docker

n8n Version

1.71.2

Node.js Version

packaged

Database

SQLite (default)

Execution mode

main (default)

[Joffcom]

Hey @cedricziel,

We have created an internal ticket to look into this which we will be tracking as "N8N-7955"