Classifier node does not work with openAI model node in "use response API"

[danielpoe]

Bug Description

See: #23281

Its not fixed.

Expected behavior:

• User adds AI "classifier" node
• User adds OpenAI model

=> It just works

Curent Behavior:

• framework error is shown - user gets no help how to fix it.

To fix it one must disable the "use response API" - but thats not catched and user is not guided.

Also there is technical no reason why it should not work with the new response API.

To Reproduce

• User adds AI "classifier" node
• User adds OpenAI model
• Execute Flow
• See Error

Expected behavior

It should just work or the user gets a speaking error message that guides him to deactivate the response api.

Debug Info

=> It just works or the user gets a nice message "response api not supported by classifier"

Operating System

independent

n8n Version

2.4.5

Node.js Version

23

Database

PostgreSQL

Execution mode

main (default)

Hosting

n8n cloud