"Failed to fetch response" using o1-mini and o3-mini API

I know similar questions have been asked quite a bit, but I’ve tried everything I can think of and still can’t get anything to work. Whenever I try to use o1-mini or o3-mini, I receive a “failed to fetch response” error. Here’s a summary of what I’ve checked.

Here’s what I’ve checked:

  • gpt-4o, gpt-4o-mini, etc. all work fine
  • I’m in Tier 3, I received my “welcome to o3-mini” message from OpenAI last week.
  • o1-mini never worked for me either
  • Permissions are set to allow ALL in the API key
  • I’ve allowed every model type in my project limit settings
  • I have token limits set to default
  • I only have one project and that project is selected
  • My project is still in the testing phase and I’m the only one testing, I definitely haven’t reached token limits