"Trying to contact this model returned this error" is blank

Sorry guys

how can I debug this?

That’s my configuration

URL must be either

  • https://api.openai.com/v1/chat/completions
  • https://api.openai.com/v1/responses

Also worth mentioning, that GPT 5.4 Nano may be better and cheaper that GPT 5 Mini, depending on the task.

Check the /logs page